/*
 * gitg-commit-view.c
 * This file is part of gitg - git repository viewer
 *
 * Copyright (C) 2009 - Jesse van den Kieboom
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <gtksourceview/gtksourceview.h>
#include <gtksourceview/gtksourcelanguagemanager.h>
#include <gtksourceview/gtksourcestyleschememanager.h>
#include <gtksourceview/gtksourcegutterrendererpixbuf.h>
#include <glib/gi18n.h>
#include <string.h>
#include <libgitg/gitg-commit.h>
#include <libgitg/gitg-shell.h>

#include "gitg-commit-view.h"
#include "gitg-diff-view.h"
#include "gitg-utils.h"

#define GITG_COMMIT_VIEW_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), GITG_TYPE_COMMIT_VIEW, GitgCommitViewPrivate))

#define CATEGORY_UNSTAGE_HUNK "CategoryUnstageHunk"
#define CATEGORY_STAGE_HUNK "CategoryStageHunk"

/* Properties */
enum
{
	PROP_0,
	PROP_REPOSITORY,
	PROP_CONTEXT_SIZE
};

enum
{
	COLUMN_NAME = 0,
	COLUMN_FILE,
	N_COLUMNS
};

typedef enum
{
	CONTEXT_TYPE_FILE,
	CONTEXT_TYPE_HUNK
} ContextType;

struct _GitgCommitViewPrivate
{
	GitgCommit *commit;
	GitgRepository *repository;

	GtkListStore *store_unstaged;
	GtkListStore *store_staged;

	GtkTreeView *tree_view_staged;
	GtkTreeView *tree_view_unstaged;

	GtkSourceView *changes_view;
	GtkTextView *comment_view;
	GtkSourceGutterRenderer *pixbuf_renderer;
	GtkCheckButton *check_button_signed_off_by;
	GtkCheckButton *check_button_amend;

	GtkHScale *hscale_context;
	gint context_size;

	GitgShell *shell;
	guint update_id;
	gboolean is_diff;

	GdkCursor *hand;
	GitgChangedFile *current_file;
	GitgChangedFileChanges current_changes;

	GtkUIManager *ui_manager;
	ContextType context_type;
	GtkTextIter context_iter;

	GtkActionGroup *group_context;
	GtkTextMark *highlight_mark;
	GtkTextTag *highlight_tag;

	GSettings *message_settings;
	GSettings *diff_settings;
};

static void gitg_commit_view_buildable_iface_init (GtkBuildableIface *iface);

G_DEFINE_TYPE_EXTENDED (GitgCommitView, gitg_commit_view, GTK_TYPE_VPANED, 0,
	G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE, gitg_commit_view_buildable_iface_init));

static GtkBuildableIface parent_iface;

static void     on_commit_file_inserted                (GitgCommit                   *commit,
                                                        GitgChangedFile              *file,
                                                        GitgCommitView               *view);
static void     on_commit_file_removed                 (GitgCommit                   *commit,
                                                        GitgChangedFile              *file,
                                                        GitgCommitView               *view);

static void     on_staged_button_press                 (GtkWidget                    *widget,
                                                        GdkEventButton               *event,
                                                        GitgCommitView               *view);
static void     on_unstaged_button_press               (GtkWidget                    *widget,
                                                        GdkEventButton               *event,
                                                        GitgCommitView               *view);
static gboolean on_staged_unstaged_button_press_before (GtkWidget                    *widget,
                                                        GdkEventButton               *event,
                                                        GitgCommitView               *view);
static void     on_unstaged_tree_view_row_activated    (GtkTreeView                  *tree_view,
                                                        GtkTreePath                  *path,
                                                        GtkTreeViewColumn            *column,
                                                        GitgCommitView               *view);
static void     on_staged_tree_view_row_activated      (GtkTreeView                  *tree_view,
                                                        GtkTreePath                  *path,
                                                        GtkTreeViewColumn            *column,
                                                        GitgCommitView               *view);

static gboolean popup_unstaged_menu                    (GitgCommitView               *view,
                                                        GdkEventButton               *event);
static gboolean popup_staged_menu                      (GitgCommitView               *view,
                                                        GdkEventButton               *event);

static gboolean on_staged_popup_menu                   (GtkWidget                    *widget,
                                                        GitgCommitView               *view);
static gboolean on_unstaged_popup_menu                 (GtkWidget                    *widget,
                                                        GitgCommitView               *view);

static gboolean on_staged_motion                       (GtkWidget                    *widget,
                                                        GdkEventMotion               *event,
                                                        GitgCommitView               *view);
static gboolean on_unstaged_motion                     (GtkWidget                    *widget,
                                                        GdkEventMotion               *event,
                                                        GitgCommitView               *view);

static void     on_commit_clicked                      (GtkButton                    *button,
                                                        GitgCommitView               *view);
static void     on_context_value_changed               (GtkHScale                    *scale,
                                                        GitgCommitView               *view);

static void     on_changes_view_popup_menu             (GtkTextView                  *textview,
                                                        GtkMenu                      *menu,
                                                        GitgCommitView               *view);

static void     on_stage_changes                       (GtkAction                    *action,
                                                        GitgCommitView               *view);
static void     on_revert_changes                      (GtkAction                    *action,
                                                        GitgCommitView               *view);
static void     on_ignore_file                         (GtkAction                    *action,
                                                        GitgCommitView               *view);
static void     on_unstage_changes                     (GtkAction                    *action,
                                                        GitgCommitView               *view);
static void     on_edit_file                           (GtkAction                    *action,
                                                        GitgCommitView               *view);
static void     on_delete_file                         (GtkAction                    *action,
                                                        GitgCommitView               *view);

static void     on_check_button_amend_toggled          (GtkToggleButton              *button,
                                                        GitgCommitView               *view);

static void     pixbuf_renderer_query_data_cb          (GtkSourceGutterRenderer      *renderer,
                                                        GtkTextIter                  *start,
                                                        GtkTextIter                  *end,
                                                        GtkSourceGutterRendererState  state,
                                                        GitgCommitView               *view);
static gboolean pixbuf_renderer_query_activatable_cb   (GtkSourceGutterRenderer      *renderer,
                                                        GtkTextIter                  *iter,
                                                        GdkRectangle                 *area,
                                                        GdkEvent                     *event,
                                                        GitgCommitView               *view);
static void     pixbuf_renderer_activate_cb            (GtkSourceGutterRenderer      *renderer,
                                                        GtkTextIter                  *iter,
                                                        GdkRectangle                 *area,
                                                        GdkEvent                     *event,
                                                        GitgCommitView               *view);

static void
gitg_commit_view_finalize (GObject *object)
{
	GitgCommitView *view = GITG_COMMIT_VIEW (object);

	if (view->priv->update_id)
	{
		g_signal_handler_disconnect (view->priv->shell, view->priv->update_id);
	}

	gitg_io_cancel (GITG_IO (view->priv->shell));
	g_object_unref (view->priv->shell);
	g_object_unref (view->priv->ui_manager);

	g_object_unref (view->priv->hand);

	G_OBJECT_CLASS (gitg_commit_view_parent_class)->finalize (object);
}

static void
icon_data_func (GtkTreeViewColumn *column,
                GtkCellRenderer   *renderer,
                GtkTreeModel      *model,
                GtkTreeIter       *iter,
                GitgCommitView    *view)
{
	GitgChangedFile *file;

	gtk_tree_model_get (model, iter, COLUMN_FILE, &file, -1);
	GitgChangedFileStatus status = gitg_changed_file_get_status (file);

	gboolean staged = (model == GTK_TREE_MODEL (view->priv->store_staged));

	switch (status)
	{
		case GITG_CHANGED_FILE_STATUS_NEW:
			g_object_set (renderer,
			              "stock-id",
			              staged ? GTK_STOCK_ADD : GTK_STOCK_NEW,
			              NULL);
		break;
		case GITG_CHANGED_FILE_STATUS_MODIFIED:
			g_object_set (renderer,
			              "stock-id",
			              staged ? GTK_STOCK_APPLY : GTK_STOCK_EDIT,
			              NULL);
		break;
		case GITG_CHANGED_FILE_STATUS_DELETED:
			g_object_set (renderer,
			              "stock-id",
			              staged ? GTK_STOCK_REMOVE : GTK_STOCK_DELETE,
			              NULL);
		break;
		default:
		break;
	}

	g_object_unref (file);
}

static void
set_icon_data_func (GitgCommitView  *view,
                    GtkTreeView     *treeview,
                    GtkCellRenderer *renderer)
{
	GtkTreeViewColumn *column = gtk_tree_view_get_column (treeview, 0);

	gtk_tree_view_column_set_cell_data_func (column,
	                                         renderer,
	                                         (GtkTreeCellDataFunc)icon_data_func,
	                                         view,
	                                         NULL);
}

static void
set_language (GitgCommitView    *view,
              GtkSourceLanguage *language)
{
	GtkTextView *text_view;
	GtkSourceBuffer *buffer;

	text_view = GTK_TEXT_VIEW (view->priv->changes_view);
	buffer = GTK_SOURCE_BUFFER (gtk_text_view_get_buffer (text_view));

	gtk_source_buffer_set_language (buffer, language);
	gitg_diff_view_set_diff_enabled (GITG_DIFF_VIEW (view->priv->changes_view),
	                                 FALSE);
}

static void
set_diff_language (GitgCommitView *view)
{
	GtkSourceLanguageManager *manager = gtk_source_language_manager_get_default ();
	GtkSourceLanguage *language = gtk_source_language_manager_get_language (manager, "gitgdiff");

	set_language (view, language);
	gitg_diff_view_set_diff_enabled (GITG_DIFF_VIEW (view->priv->changes_view), TRUE);
	gtk_widget_set_sensitive (GTK_WIDGET (view->priv->hscale_context), TRUE);
}

static void
show_binary_information (GitgCommitView *view)
{
	set_language (view, NULL);

	gtk_widget_set_sensitive (GTK_WIDGET (view->priv->hscale_context), FALSE);

	gtk_text_buffer_set_text (gtk_text_view_get_buffer (GTK_TEXT_VIEW (view->priv->changes_view)),
	                          _("Cannot display file content as text"),
	                          -1);
}

static void
on_changes_update (GitgShell       *shell,
                   gchar          **buffer,
                   GitgCommitView  *view)
{
	gchar *line;
	GtkTextBuffer *buf = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view->priv->changes_view));
	GtkTextIter iter;

	gtk_text_buffer_get_end_iter (buf, &iter);

	while ((line = *(buffer++)))
	{
		if (view->priv->is_diff && g_str_has_prefix (line, "@@"))
		{
			if (view->priv->current_changes & GITG_CHANGED_FILE_CHANGES_UNSTAGED)
			{
				gtk_source_buffer_create_source_mark (GTK_SOURCE_BUFFER (buf),
				                                      NULL,
				                                      CATEGORY_STAGE_HUNK,
				                                      &iter);
			}
			else
			{
				gtk_source_buffer_create_source_mark (GTK_SOURCE_BUFFER (buf),
				                                      NULL,
				                                      CATEGORY_UNSTAGE_HUNK,
				                                      &iter);
			}
		}

		gtk_text_buffer_insert (buf, &iter, line, -1);
	}

	if (gtk_source_buffer_get_language (GTK_SOURCE_BUFFER (buf)) == NULL)
	{
		gchar *content_type = gitg_utils_guess_content_type (GTK_TEXT_BUFFER (buf));

		if (content_type && !gitg_utils_can_display_content_type (content_type))
		{
			gitg_io_cancel (GITG_IO (shell));
			show_binary_information (view);
		}
		else if (content_type)
		{
			GtkSourceLanguage *language = gitg_utils_get_language (NULL, content_type);
			set_language (view, language);
			gtk_widget_set_sensitive (GTK_WIDGET (view->priv->hscale_context), FALSE);
		}

		g_free (content_type);
	}

	while (gtk_events_pending ())
	{
		gtk_main_iteration ();
	}
}

static void
connect_update (GitgCommitView *view)
{
	view->priv->update_id = g_signal_connect (view->priv->shell,
	                                          "update",
	                                          G_CALLBACK (on_changes_update),
	                                          view);
}

static void
set_current_file (GitgCommitView         *view,
                  GitgChangedFile        *file,
                  GitgChangedFileChanges  changes)
{
	if (view->priv->current_file != NULL)
	{
		g_object_unref (view->priv->current_file);
	}

	view->priv->current_file = file ? g_object_ref (file) : NULL;
	view->priv->current_changes = changes;
}

static gboolean
get_selected_files (GtkTreeView             *tree_view,
                    GList                  **files,
                    GList                  **paths,
                    GitgChangedFileChanges  *changes,
                    GitgChangedFileStatus   *status)
{
	GtkTreeSelection *selection = gtk_tree_view_get_selection (tree_view);

	if (files == NULL && changes == NULL && status == NULL && paths == NULL)
	{
		return gtk_tree_selection_count_selected_rows (selection) != 0;
	}

	GtkTreeModel *model;
	GList *items = gtk_tree_selection_get_selected_rows (selection, &model);

	if (files)
	{
		*files = NULL;
	}

	if (paths)
	{
		*paths = NULL;
	}

	if (!items)
	{
		return FALSE;
	}

	if (changes)
	{
		*changes = ~0;
	}

	if (status)
	{
		*status = -1;
	}

	GList *item;
	GitgChangedFile *file;

	for (item = items; item; item = g_list_next (item))
	{
		GtkTreeIter iter;

		gtk_tree_model_get_iter (model, &iter, (GtkTreePath *)item->data);
		gtk_tree_model_get (model, &iter, COLUMN_FILE, &file, -1);

		if (changes)
		{
			*changes &= gitg_changed_file_get_status (file);
		}

		GitgChangedFileStatus s = gitg_changed_file_get_status (file);

		if (status)
		{
			if (*status != -1 && *status != s)
			{
				*status = GITG_CHANGED_FILE_STATUS_NONE;
			}
			else
				*status = s;
		}

		if (files)
		{
			*files = g_list_prepend (*files, file);
		}
		else
		{
			g_object_unref (file);
		}
	}

	if (paths)
	{
		*paths = items;
	}
	else
	{
		g_list_free_full (items, (GDestroyNotify)gtk_tree_path_free);
	}

	if (files)
	{
		*files = g_list_reverse (*files);
	}

	return TRUE;
}

static gboolean
check_selection (GtkTreeView    *tree_view,
                GtkTreeIter    *iter,
                GitgCommitView *view)
{
	if (view->priv->update_id)
	{
		g_signal_handler_disconnect (view->priv->shell, view->priv->update_id);
	}

	gitg_io_cancel (GITG_IO (view->priv->shell));
	view->priv->update_id = 0;

	GtkTextView *tv = GTK_TEXT_VIEW (view->priv->changes_view);
	GtkTextBuffer *buffer = gtk_text_view_get_buffer (tv);
	GtkTextIter start;
	GtkTextIter end;

	gtk_text_buffer_get_bounds (buffer, &start, &end);

	gtk_source_buffer_remove_source_marks (GTK_SOURCE_BUFFER (buffer),
	                                       &start,
	                                       &end,
	                                       CATEGORY_UNSTAGE_HUNK);

	gtk_source_buffer_remove_source_marks (GTK_SOURCE_BUFFER (buffer),
	                                       &start,
	                                       &end,
	                                       CATEGORY_STAGE_HUNK);

	gtk_text_buffer_set_text (gtk_text_view_get_buffer (tv), "", -1);

	GList *paths;
	gboolean ret;
	get_selected_files (tree_view, NULL, &paths, NULL, NULL);

	if (g_list_length (paths) != 1)
	{
		set_current_file (view, NULL, GITG_CHANGED_FILE_CHANGES_NONE);
		gtk_widget_set_sensitive (GTK_WIDGET (view->priv->hscale_context),
		                          FALSE);
		ret = FALSE;
	}
	else
	{
		if (iter)
		{
			gtk_tree_model_get_iter (gtk_tree_view_get_model (tree_view),
			                        iter,
			                        (GtkTreePath *)paths->data);
		}

		ret = TRUE;
	}

	g_list_free_full (paths, (GDestroyNotify)gtk_tree_path_free);
	return ret;
}

static void
unselect_tree_view (GtkTreeView *view)
{
	gtk_tree_selection_unselect_all (gtk_tree_view_get_selection (view));
}

static void
unstaged_selection_changed (GtkTreeSelection *selection,
                            GitgCommitView   *view)
{
	GtkTreeModel *model;
	GtkTreeIter iter;

	if (!check_selection (view->priv->tree_view_unstaged, &iter, view))
	{
		return;
	}

	model = gtk_tree_view_get_model (view->priv->tree_view_unstaged);
	unselect_tree_view (view->priv->tree_view_staged);

	GitgChangedFile *file;

	gtk_tree_model_get (model, &iter, COLUMN_FILE, &file, -1);
	GitgChangedFileStatus status = gitg_changed_file_get_status (file);
	GFile *f = gitg_changed_file_get_file (file);

	if (status == GITG_CHANGED_FILE_STATUS_NEW)
	{
		gchar *content_type = gitg_utils_get_content_type (f);

		if (!gitg_utils_can_display_content_type (content_type))
		{
			show_binary_information (view);
		}
		else
		{
			GInputStream *stream = G_INPUT_STREAM (g_file_read (f, NULL, NULL));

			if (!stream)
			{
				show_binary_information (view);
			}
			else
			{
				gchar *basename = g_file_get_basename (f);
				GtkSourceLanguage *language;

				language = gitg_utils_get_language (basename,
				                                    content_type);
				g_free (basename);

				set_language (view, language);
				gtk_widget_set_sensitive (GTK_WIDGET (view->priv->hscale_context),
				                          FALSE);

				view->priv->is_diff = FALSE;
				connect_update (view);

				gitg_shell_run_stream (view->priv->shell,
				                       stream,
				                       NULL);

				g_object_unref (stream);
			}
		}

		g_free (content_type);
	}
	else
	{
		gboolean allow_external;

		set_diff_language (view);
		view->priv->is_diff = TRUE;
		connect_update (view);

		gchar *path = gitg_repository_relative (view->priv->repository, f);

		gchar ct[10];
		g_snprintf (ct, sizeof (ct), "-U%d", view->priv->context_size);

		allow_external = g_settings_get_boolean (view->priv->diff_settings,
		                                         "external");

		gitg_shell_run (view->priv->shell,
		                gitg_command_new (view->priv->repository,
		                                  "diff",
		                                  allow_external ? "--ext-diff" : "--no-ext-diff",
		                                  "--no-color",
		                                  ct,
		                                  "--",
		                                  path,
		                                  NULL),
		                NULL);

		g_free (path);
	}

	set_current_file (view, file, GITG_CHANGED_FILE_CHANGES_UNSTAGED);

	g_object_unref (file);
	g_object_unref (f);
}

static void
staged_selection_changed (GtkTreeSelection *selection,
                          GitgCommitView   *view)
{
	GtkTreeModel *model;
	GtkTreeIter iter;

	if (!check_selection (view->priv->tree_view_staged, &iter, view))
	{
		return;
	}

	model = gtk_tree_view_get_model (view->priv->tree_view_staged);
	unselect_tree_view (view->priv->tree_view_unstaged);

	GitgChangedFile *file;

	gtk_tree_model_get (model, &iter, COLUMN_FILE, &file, -1);
	GitgChangedFileStatus status = gitg_changed_file_get_status (file);

	GFile *f = gitg_changed_file_get_file (file);
	gchar *path = gitg_repository_relative (view->priv->repository, f);

	if (status == GITG_CHANGED_FILE_STATUS_NEW)
	{
		view->priv->is_diff = FALSE;

		gchar *content_type = gitg_utils_get_content_type (f);

		if (!gitg_utils_can_display_content_type (content_type))
		{
			show_binary_information (view);
		}
		else
		{
			gtk_widget_set_sensitive (GTK_WIDGET (view->priv->hscale_context),
			                          FALSE);

			connect_update (view);

			gchar *indexpath = g_strconcat (":0:", path, NULL);
			gitg_shell_run (view->priv->shell,
			                gitg_command_new (view->priv->repository,
			                                  "show",
			                                  "--encoding=UTF-8",
			                                  "--no-color",
			                                  indexpath,
			                                  NULL),
			                NULL);

			g_free (indexpath);
		}

		g_free (content_type);
	}
	else
	{
		gboolean allow_external;

		view->priv->is_diff = TRUE;
		set_diff_language (view);
		connect_update (view);

		gchar *head = gitg_repository_parse_head (view->priv->repository);
		gchar ct[10];
		g_snprintf (ct, sizeof (ct), "-U%d", view->priv->context_size);

		allow_external = g_settings_get_boolean (view->priv->diff_settings,
		                                         "external");

		gitg_shell_run (view->priv->shell,
		                gitg_command_new (view->priv->repository,
		                                  "diff-index",
		                                  allow_external ? "--ext-diff" : "--no-ext-diff",
		                                  ct,
		                                  "--cached",
		                                  "--no-color",
		                                  head,
		                                  "--",
		                                  path,
		                                  NULL),
		                NULL);

		g_free (head);
	}

	g_object_unref (f);
	g_free (path);

	set_current_file (view, file, GITG_CHANGED_FILE_CHANGES_CACHED);
	g_object_unref (file);
}

static gint
compare_by_name (GtkTreeModel *model,
                 GtkTreeIter  *a,
                 GtkTreeIter  *b,
                 gpointer      userdata)
{
	gchar *s1;
	gchar *s2;

	gtk_tree_model_get (model, a, COLUMN_NAME, &s1, -1);
	gtk_tree_model_get (model, b, COLUMN_NAME, &s2, -1);

	gint ret = gitg_utils_sort_names (s1, s2);

	g_free (s1);
	g_free (s2);

	return ret;
}

static void
set_sort_func (GtkListStore *store)
{
	gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
	                                      0,
	                                      GTK_SORT_ASCENDING);

	gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (store),
	                                 0,
	                                 compare_by_name,
	                                 NULL,
	                                 NULL);
}

static gboolean
has_hunk_mark (GtkSourceBuffer *buffer,
               GtkTextIter     *iter)
{
	GSList *m1;
	gboolean has_mark;

	m1 = gtk_source_buffer_get_source_marks_at_iter (buffer,
	                                                 iter,
	                                                 CATEGORY_UNSTAGE_HUNK);

	has_mark = (m1 != NULL);
	g_slist_free (m1);

	if (has_mark)
	{
		return TRUE;
	}

	m1 = gtk_source_buffer_get_source_marks_at_iter (buffer,
	                                                 iter,
	                                                 CATEGORY_STAGE_HUNK);

	has_mark = (m1 != NULL);
	g_slist_free (m1);

	return has_mark;
}

static gchar *
get_patch_header (GitgCommitView    *view,
                  GtkTextBuffer     *buffer,
                  GtkTextIter const *iter)
{
	GtkTextIter begin;
	GtkTextIter end;
	GitgDiffIter diff_iter;

	if (!gitg_diff_view_get_header_at_iter (GITG_DIFF_VIEW (view->priv->changes_view),
	                                        iter,
	                                        &diff_iter))
	{
		return NULL;
	}

	gitg_diff_iter_get_bounds (&diff_iter, &begin, &end);

	return gtk_text_buffer_get_text (buffer, &begin, &end, TRUE);
}

static gchar *
get_patch_contents (GitgCommitView    *view,
                    GtkTextBuffer     *buffer,
                    GtkTextIter const *iter)
{
	GtkTextIter begin;
	GtkTextIter end;
	GitgDiffIter diff_iter;

	if (!gitg_diff_view_get_hunk_at_iter (GITG_DIFF_VIEW (view->priv->changes_view),
	                                      iter,
	                                      &diff_iter))
	{
		return NULL;
	}

	gitg_diff_iter_get_bounds (&diff_iter, &begin, &end);

	return gtk_text_buffer_get_text (buffer, &begin, &end, FALSE);
}

static gchar *
get_hunk_patch (GitgCommitView *view,
                GtkTextIter    *iter)
{
	/* Get patch header */
	GtkTextBuffer *buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view->priv->changes_view));
	gchar *header = get_patch_header (view, buffer, iter);

	if (!header)
	{
		return NULL;
	}

	/* Get patch contents */
	gchar *contents = get_patch_contents (view, buffer, iter);

	if (!contents)
	{
		g_free (header);
		return NULL;
	}

	return g_strconcat (header, contents, NULL);
}

static gchar *
line_patch_contents (GitgCommitView    *view,
                     GtkTextIter const *iter,
                     GitgDiffLineType   old_type,
                     GitgDiffLineType   new_type)
{
	GtkTextIter start;
	GtkTextIter end;
	GtkTextIter patch_iter = *iter;
	GitgDiffView *diff_view = GITG_DIFF_VIEW (view->priv->changes_view);
	GtkTextBuffer *buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (diff_view));
	GitgDiffIter diff_iter;

	gtk_text_iter_set_line_offset (&patch_iter, 0);

	if (!gitg_diff_view_get_hunk_at_iter (diff_view, &patch_iter, &diff_iter))
	{
		return NULL;
	}

	gitg_diff_iter_get_bounds (&diff_iter, &start, &end);
	GtkTextIter begin = start;

	GString *patch = g_string_new ("");
	gchar *header = NULL;
	gint count_old = 0;
	gint count_new = 0;

	while (gtk_text_iter_compare (&start, &end) < 0)
	{
		GitgDiffLineType line_type;
		gboolean is_patch_line;

		line_type = gitg_diff_view_get_line_type (diff_view, &start);

		is_patch_line = gtk_text_iter_equal (&start, &patch_iter);

		gchar *text;
		GtkTextIter line_end = start;
		gtk_text_iter_forward_to_line_end (&line_end);

		if (gtk_text_iter_equal (&start, &begin))
		{
			header = gtk_text_buffer_get_text (buffer, &start, &line_end, TRUE);
		}
		else
		{
			if (line_type == old_type && !is_patch_line)
			{
				/* Take over like it was context */
				g_string_append_c (patch, ' ');

				if (!gtk_text_iter_ends_line (&start))
				{
					gtk_text_iter_forward_char (&start);
				}
			}

			if (line_type == GITG_DIFF_LINE_TYPE_NONE ||
			    line_type == old_type || is_patch_line)
			{
				/* copy context */
				gtk_text_iter_forward_line (&line_end);
				text = gtk_text_buffer_get_text (buffer, &start, &line_end, TRUE);

				g_string_append (patch, text);

				if (!is_patch_line || line_type == GITG_DIFF_LINE_TYPE_REMOVE)
				{
					++count_old;
				}

				if (!is_patch_line || line_type == GITG_DIFF_LINE_TYPE_ADD)
				{
					++count_new;
				}

				g_free (text);
			}
		}

		if (!gtk_text_iter_forward_line (&start))
		{
			break;
		}
	}

	gchar *head = gitg_utils_rewrite_hunk_counters (header, count_old, count_new);
	g_free (header);
	gchar *ret = NULL;

	if (head)
	{
		gchar *contents = g_string_free (patch, FALSE);
		ret = g_strconcat (head, "\n", contents, NULL);

		g_free (contents);
		g_free (head);
	}

	return ret;
}

static gboolean
stage_unstage_hunk (GitgCommitView  *view,
                    gchar const     *hunk,
                    GError         **error)
{
	gboolean ret;
	gboolean unstage = view->priv->current_changes & GITG_CHANGED_FILE_CHANGES_UNSTAGED;

	if (unstage)
	{
		ret = gitg_commit_stage (view->priv->commit,
		                         view->priv->current_file,
		                         hunk,
		                         error);
	}
	else
	{
		ret = gitg_commit_unstage (view->priv->commit,
		                           view->priv->current_file,
		                           hunk,
		                           error);
	}

	return ret;
}

static gboolean
handle_stage_unstage_line (GitgCommitView    *view,
                           GtkTextIter const *iter)
{
	GitgDiffView *diff_view = GITG_DIFF_VIEW (view->priv->changes_view);
	GtkTextBuffer *buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view->priv->changes_view));
	gchar *header = get_patch_header (view, buffer, iter);
	GitgDiffLineType old_type;
	GitgDiffLineType new_type;

	if (!header)
	{
		return FALSE;
	}

	GitgDiffIter diff_iter;

	if (!gitg_diff_view_get_header_at_iter (diff_view, iter, &diff_iter))
	{
		g_free (header);
		return FALSE;
	}

	if (view->priv->current_changes & GITG_CHANGED_FILE_CHANGES_UNSTAGED)
	{
		old_type = GITG_DIFF_LINE_TYPE_REMOVE;
		new_type = GITG_DIFF_LINE_TYPE_ADD;
	}
	else
	{
		old_type = GITG_DIFF_LINE_TYPE_ADD;
		new_type = GITG_DIFF_LINE_TYPE_REMOVE;
	}

	gchar *contents = line_patch_contents (view, iter, old_type, new_type);

	if (!contents)
	{
		g_free (header);
		return FALSE;
	}

	gboolean ret;
	GitgChangedFile *file = g_object_ref (view->priv->current_file);
	GError *error = NULL;
	gchar *hunk = g_strconcat (header, contents, NULL);

	g_free (contents);
	g_free (header);

	ret = stage_unstage_hunk (view, hunk, &error);

	if (ret && file == view->priv->current_file)
	{
		gitg_diff_view_clear_line (GITG_DIFF_VIEW (view->priv->changes_view),
		                           iter,
		                           old_type,
		                           new_type);
	}
	else if (!ret)
	{
		g_warning ("Could not stage/unstage: %s", error->message);
		g_error_free (error);
	}

	g_free (hunk);
	g_object_unref (file);

	return ret;
}

static gboolean
handle_stage_unstage (GitgCommitView *view,
                      GtkTextIter    *iter)
{
	gchar *hunk = get_hunk_patch (view, iter);

	if (!hunk)
	{
		return FALSE;
	}

	gboolean ret;
	GitgChangedFile *file = g_object_ref (view->priv->current_file);
	GError *error = NULL;

	ret = stage_unstage_hunk (view, hunk, &error);

	if (ret && file == view->priv->current_file)
	{
		/* remove hunk from text view */
		gitg_diff_view_remove_hunk (GITG_DIFF_VIEW (view->priv->changes_view), iter);
	}
	else if (!ret)
	{
		g_warning ("Could not stage/unstage: %s", error->message);
		g_error_free (error);
	}

	g_object_unref (file);
	g_free (hunk);

	return ret;
}

static gboolean
get_info_at_pointer (GitgCommitView    *view,
                     GtkTextIter       *iter,
                     gboolean          *is_hunk,
                     gchar            **hunk,
                     GitgDiffLineType  *line_type)
{
	GtkTextView *textview = GTK_TEXT_VIEW (view->priv->changes_view);
	gint x;
	gint y;
	gint width;
	gint height;
	gint buf_x;
	gint buf_y;

	/* Get where the pointer really is. */
	GdkWindow *win = gtk_text_view_get_window (textview, GTK_TEXT_WINDOW_TEXT);

	gdk_window_get_pointer (win, &x, &y, NULL);

	width = gdk_window_get_width (win);
	height = gdk_window_get_height (win);

	if (x < 0 || y < 0 || x > width || y > height)
	{
		return FALSE;
	}

	/* Get the iter where the cursor is at */
	gtk_text_view_window_to_buffer_coords (textview, GTK_TEXT_WINDOW_TEXT, x, y, &buf_x, &buf_y);
	gtk_text_view_get_iter_at_location (textview, iter, buf_x, buf_y);

	gtk_text_iter_set_line_offset (iter, 0);

	GtkSourceBuffer *buffer = GTK_SOURCE_BUFFER (gtk_text_view_get_buffer (textview));

	if (is_hunk)
	{
		*is_hunk = has_hunk_mark (buffer, iter);

		if (*is_hunk && hunk)
		{
			*hunk = get_hunk_patch (view, iter);
		}
	}

	if (line_type)
	{
		*line_type = gitg_diff_view_get_line_type (GITG_DIFF_VIEW (view->priv->changes_view),
		                                           iter);
	}

	return TRUE;
}

static void
unset_highlight (GitgCommitView *view)
{
	if (!view->priv->highlight_mark)
	{
		return;
	}

	GtkTextBuffer *buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view->priv->changes_view));
	GtkTextIter start;
	GtkTextIter end;

	gtk_text_buffer_get_iter_at_mark (buffer, &start, view->priv->highlight_mark);
	end = start;

	gtk_text_iter_forward_to_line_end (&end);

	gtk_text_buffer_remove_tag (buffer, view->priv->highlight_tag, &start, &end);

	gtk_text_buffer_delete_mark (buffer, view->priv->highlight_mark);
	view->priv->highlight_mark = NULL;
}

static void
set_highlight (GitgCommitView *view,
               GtkTextIter    *iter)
{
	if (!view->priv->highlight_tag)
	{
		return;
	}

	GtkTextIter start = *iter;
	GtkTextBuffer *buffer = gtk_text_iter_get_buffer (iter);

	gtk_text_iter_set_line_offset (&start, 0);

	if (view->priv->highlight_mark != NULL)
	{
		GtkTextIter mark_iter;
		gtk_text_buffer_get_iter_at_mark (buffer,
		                                  &mark_iter,
		                                  view->priv->highlight_mark);

		if (gtk_text_iter_equal (&start, &mark_iter))
		{
			return;
		}

		unset_highlight (view);
	}

	view->priv->highlight_mark = gtk_text_buffer_create_mark (buffer,
	                                                          NULL,
	                                                          &start,
	                                                          TRUE);

	GtkTextIter end = start;
	gtk_text_iter_forward_to_line_end (&end);

	gtk_text_buffer_apply_tag (buffer,
	                           view->priv->highlight_tag,
	                           &start,
	                           &end);
}

static gboolean
gutter_event (GtkWidget      *widget,
              GdkEventAny    *event,
              GitgCommitView *view)
{
	GtkTextView *textview = GTK_TEXT_VIEW (view->priv->changes_view);
	gint x;
	gint y;
	gint width;
	gint height;
	gint buf_x;
	gint buf_y;
	GtkTextIter iter;
	GitgDiffLineType line_type;
	GtkSourceGutter *gutter;
	GtkSourceGutterRenderer *renderer_at_pos;

	/* Get where the pointer really is. */
	GdkWindow *win = gtk_text_view_get_window (textview, GTK_TEXT_WINDOW_LEFT);

	gdk_window_get_pointer (win, &x, &y, NULL);

	width = gdk_window_get_width (win);
	height = gdk_window_get_height (win);

	if (x < 0 || y < 0 || x > width || y > height)
	{
		unset_highlight (view);
		gdk_window_set_cursor (event->window, NULL);
		return FALSE;
	}

	/* Get the iter where the cursor is at */
	gtk_text_view_window_to_buffer_coords (textview, GTK_TEXT_WINDOW_LEFT, x, y, &buf_x, &buf_y);
	gtk_text_view_get_iter_at_location (textview, &iter, buf_x, buf_y);

	gtk_text_iter_set_line_offset (&iter, 0);

	line_type = gitg_diff_view_get_line_type (GITG_DIFF_VIEW (view->priv->changes_view),
		                                  &iter);

	gutter = gtk_source_view_get_gutter (view->priv->changes_view,
	                                     GTK_TEXT_WINDOW_LEFT);
	renderer_at_pos = gtk_source_gutter_get_renderer_at_pos (gutter, x, y);

	if (renderer_at_pos == view->priv->pixbuf_renderer &&
	    (line_type == GITG_DIFF_LINE_TYPE_ADD ||
	     line_type == GITG_DIFF_LINE_TYPE_REMOVE))
	{
		set_highlight (view, &iter);
		gdk_window_set_cursor (event->window, view->priv->hand);
	}
	else
	{
		unset_highlight (view);
		gdk_window_set_cursor (event->window, NULL);
	}

	return FALSE;
}

static gboolean
view_event (GtkWidget      *widget,
            GdkEventAny    *event,
            GitgCommitView *view)
{
	GtkTextWindowType type;
	GtkTextBuffer *buffer;
	GtkTextIter iter;
	gboolean is_hunk = FALSE;

	type = gtk_text_view_get_window_type (GTK_TEXT_VIEW (widget), event->window);
	buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));

	if (type == GTK_TEXT_WINDOW_LEFT)
	{
		return gutter_event (widget, event, view);
	}

	if (type == GTK_TEXT_WINDOW_TEXT && event->type == GDK_LEAVE_NOTIFY)
	{
		unset_highlight (view);
		gdk_window_set_cursor (event->window, NULL);
		return FALSE;
	}

	get_info_at_pointer (view, &iter, &is_hunk, NULL, NULL);

	if (event->type == GDK_LEAVE_NOTIFY ||
	    event->type == GDK_MOTION_NOTIFY ||
	    event->type == GDK_BUTTON_PRESS ||
	    event->type == GDK_BUTTON_RELEASE ||
	    event->type == GDK_ENTER_NOTIFY)
	{
		if (is_hunk)
		{
			set_highlight (view, &iter);
			gdk_window_set_cursor (event->window, view->priv->hand);
		}
		else
		{
			unset_highlight (view);
			gdk_window_set_cursor (event->window, NULL);
		}
	}

	if (type == GTK_TEXT_WINDOW_TEXT &&event->type == GDK_BUTTON_RELEASE &&
	    ((GdkEventButton *) event)->button == 1 && is_hunk &&
	    !gtk_text_buffer_get_has_selection (buffer))
	{
		if (handle_stage_unstage (view, &iter))
		{
			unset_highlight (view);
			gdk_window_set_cursor (event->window, NULL);
		}
	}

	return FALSE;
}

static GtkTextBuffer *
initialize_buffer (GitgCommitView *view)
{
	GtkTextBuffer *buffer = GTK_TEXT_BUFFER (gtk_source_buffer_new (NULL));

	GtkSourceStyleSchemeManager *manager = gtk_source_style_scheme_manager_get_default ();
	GtkSourceStyleScheme *scheme = gtk_source_style_scheme_manager_get_scheme (manager, "gitg");
	gtk_source_buffer_set_style_scheme (GTK_SOURCE_BUFFER (buffer), scheme);

	return buffer;
}

static GtkTargetEntry dnd_entries[] = {
	{"text/uri-list", 0, 1}
};

static void
on_tree_view_drag_data_get (GtkWidget        *widget,
                            GdkDragContext   *context,
                            GtkSelectionData *selection,
                            guint             info,
                            guint             time,
                            GitgCommitView   *view)
{
	GList *selected;
	GList *item;
	gchar **uris;
	guint i = 0;

	get_selected_files (GTK_TREE_VIEW (widget), &selected, NULL, NULL, NULL);
	uris = g_new (gchar *, g_list_length (selected) + 1);

	for (item = selected; item; item = g_list_next (item))
	{
		GitgChangedFile *file = GITG_CHANGED_FILE (item->data);
		GFile *gf = gitg_changed_file_get_file (file);

		uris[i++] = g_file_get_uri (gf);
		g_object_unref (gf);
	}

	uris[i] = NULL;
	gtk_selection_data_set_uris (selection, uris);

	g_strfreev (uris);

	g_list_free_full (selected, g_object_unref);
}

static void
on_tree_view_staged_drag_data_received (GtkWidget        *widget,
                                       GdkDragContext   *drag_context,
                                       gint              x,
                                       gint              y,
                                       GtkSelectionData *data,
                                       guint             info,
                                       guint             time,
                                       GitgCommitView   *view)
{
	/* Stage all the files dropped on this */
	gchar **uris = gtk_selection_data_get_uris (data);
	gchar **uri;

	for (uri = uris; *uri; ++uri)
	{
		GFile *file = g_file_new_for_uri (*uri);
		GitgChangedFile *f;

		f = gitg_commit_find_changed_file (view->priv->commit, file);

		if (f && (gitg_changed_file_get_changes (f) & GITG_CHANGED_FILE_CHANGES_UNSTAGED))
		{
			gitg_commit_stage (view->priv->commit, f, NULL, NULL);
		}

		g_object_unref (f);
		g_object_unref (file);
	}
}

static void
on_tree_view_unstaged_drag_data_received (GtkWidget        *widget,
                                         GdkDragContext   *drag_context,
                                         gint              x,
                                         gint              y,
                                         GtkSelectionData *data,
                                         guint             info,
                                         guint             time,
                                         GitgCommitView   *view)
{
	/* Unstage all the files dropped on this */
	gchar **uris = gtk_selection_data_get_uris (data);
	gchar **uri;

	for (uri = uris; *uri; ++uri)
	{
		GFile *file = g_file_new_for_uri (*uri);
		GitgChangedFile *f;

		f = gitg_commit_find_changed_file (view->priv->commit, file);

		if (f && (gitg_changed_file_get_changes (f) & GITG_CHANGED_FILE_CHANGES_CACHED))
		{
			gitg_commit_unstage (view->priv->commit, f, NULL, NULL);
		}

		g_object_unref (f);
		g_object_unref (file);
	}
}

static void
initialize_dnd (GitgCommitView *view,
                GtkTreeView    *tree_view,
                GCallback       drag_data_received)
{
	gtk_tree_view_enable_model_drag_dest (tree_view,
	                                     dnd_entries,
	                                     G_N_ELEMENTS (dnd_entries),
	                                     GDK_ACTION_COPY);

	gtk_tree_view_enable_model_drag_source (tree_view,
	                                      GDK_BUTTON1_MASK,
	                                      dnd_entries,
	                                      G_N_ELEMENTS (dnd_entries),
	                                      GDK_ACTION_COPY);

	g_signal_connect (tree_view,
	                  "drag-data-get",
	                  G_CALLBACK (on_tree_view_drag_data_get),
	                  view);

	g_signal_connect (tree_view,
	                  "drag-data-received",
	                  G_CALLBACK (drag_data_received),
	                  view);
}

static void
initialize_dnd_staged (GitgCommitView *view)
{
	initialize_dnd (view,
	               view->priv->tree_view_staged,
	               G_CALLBACK (on_tree_view_staged_drag_data_received));
}

static void
initialize_dnd_unstaged (GitgCommitView *view)
{
	initialize_dnd (view,
	               view->priv->tree_view_unstaged,
	               G_CALLBACK (on_tree_view_unstaged_drag_data_received));
}

static void
on_tag_added (GtkTextTagTable *table,
              GtkTextTag      *tag,
              GitgCommitView  *view)
{
	gtk_text_tag_set_priority (view->priv->highlight_tag,
	                           gtk_text_tag_table_get_size (table) - 1);
}

/* Copied from GtkSourceView's gtksourceviewgutterrenderermarks.c */
static int
measure_line_height (GtkSourceView *view)
{
	PangoLayout *layout;
	gint height = 12;

	layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), "QWERTY");

	if (layout)
	{
		pango_layout_get_pixel_size (layout, NULL, &height);
		g_object_unref (layout);
	}

	return height - 2;
}

static void
gitg_commit_view_parser_finished (GtkBuildable *buildable,
                                  GtkBuilder   *builder)
{
	GtkSourceMarkAttributes *attrs;
	GtkSourceGutter *gutter;

	if (parent_iface.parser_finished)
	{
		parent_iface.parser_finished (buildable, builder);
	}

	/* Store widgets */
	GitgCommitView *self = GITG_COMMIT_VIEW (buildable);

	GtkBuilder *b = gitg_utils_new_builder ("gitg-commit-menu.ui");
	self->priv->ui_manager = g_object_ref (gtk_builder_get_object (b, "uiman"));

	g_signal_connect (gtk_builder_get_object (b, "StageChangesAction"),
	                  "activate",
	                  G_CALLBACK (on_stage_changes),
	                  self);

	g_signal_connect (gtk_builder_get_object (b, "RevertChangesAction"),
	                  "activate",
	                  G_CALLBACK (on_revert_changes),
	                  self);

	g_signal_connect (gtk_builder_get_object (b, "IgnoreFileAction"),
	                  "activate",
	                  G_CALLBACK (on_ignore_file),
	                  self);

	g_signal_connect (gtk_builder_get_object (b, "UnstageChangesAction"),
	                  "activate",
	                  G_CALLBACK (on_unstage_changes),
	                  self);

	g_signal_connect (gtk_builder_get_object (b, "EditFileAction"),
	                  "activate",
	                  G_CALLBACK (on_edit_file),
	                  self);

	g_signal_connect (gtk_builder_get_object (b, "DeleteFileAction"),
	                  "activate",
	                  G_CALLBACK (on_delete_file),
	                  self);

	self->priv->group_context = GTK_ACTION_GROUP (gtk_builder_get_object (b, "action_group_commit_context"));

	g_object_unref (b);

	self->priv->tree_view_unstaged = GTK_TREE_VIEW (gtk_builder_get_object (builder, "tree_view_unstaged"));
	self->priv->tree_view_staged = GTK_TREE_VIEW (gtk_builder_get_object (builder, "tree_view_staged"));

	self->priv->store_unstaged = gtk_list_store_new (N_COLUMNS, G_TYPE_STRING, GITG_TYPE_CHANGED_FILE);
	self->priv->store_staged = gtk_list_store_new (N_COLUMNS, G_TYPE_STRING, GITG_TYPE_CHANGED_FILE);

	set_sort_func (self->priv->store_unstaged);
	set_sort_func (self->priv->store_staged);

	self->priv->changes_view = GTK_SOURCE_VIEW (gtk_builder_get_object (builder, "source_view_changes"));

	gtk_widget_add_events (GTK_WIDGET (self->priv->changes_view),
	                       GDK_LEAVE_NOTIFY_MASK | GDK_ENTER_NOTIFY_MASK);

	self->priv->comment_view = GTK_TEXT_VIEW (gtk_builder_get_object (builder, "text_view_comment"));
	self->priv->check_button_signed_off_by = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "check_button_signed_off_by"));
	self->priv->check_button_amend = GTK_CHECK_BUTTON (gtk_builder_get_object (builder, "check_button_amend"));

	g_settings_bind (self->priv->message_settings,
	                 "show-right-margin",
	                 self->priv->comment_view,
	                 "show-right-margin",
	                 G_SETTINGS_BIND_GET | G_SETTINGS_BIND_SET);

	g_settings_bind (self->priv->message_settings,
	                 "right-margin-at",
	                 self->priv->comment_view,
	                 "right-margin-position",
	                 G_SETTINGS_BIND_GET | G_SETTINGS_BIND_SET);

	self->priv->hscale_context = GTK_HSCALE (gtk_builder_get_object (builder, "hscale_context"));
	gtk_range_set_value (GTK_RANGE (self->priv->hscale_context), 3);

	initialize_dnd_staged (self);
	initialize_dnd_unstaged (self);

	GtkIconTheme *theme = gtk_icon_theme_get_default ();
	GdkPixbuf *pixbuf = gtk_icon_theme_load_icon (theme, GTK_STOCK_ADD, 12, GTK_ICON_LOOKUP_USE_BUILTIN, NULL);

	if (pixbuf)
	{
		attrs = gtk_source_mark_attributes_new ();
		gtk_source_mark_attributes_set_pixbuf (attrs, pixbuf);

		gtk_source_view_set_mark_attributes (self->priv->changes_view,
		                                     CATEGORY_STAGE_HUNK,
		                                     attrs, 1);

		g_object_unref (pixbuf);
		g_object_unref (attrs);
	}

	pixbuf = gtk_icon_theme_load_icon (theme, GTK_STOCK_REMOVE, 12, GTK_ICON_LOOKUP_USE_BUILTIN, NULL);

	if (pixbuf)
	{
		attrs = gtk_source_mark_attributes_new ();
		gtk_source_mark_attributes_set_pixbuf (attrs, pixbuf);

		gtk_source_view_set_mark_attributes (self->priv->changes_view,
		                                     CATEGORY_UNSTAGE_HUNK,
		                                     attrs, 2);

		g_object_unref (pixbuf);
		g_object_unref (attrs);
	}

	gitg_utils_set_monospace_font (GTK_WIDGET (self->priv->changes_view));

	GtkTextBuffer *buffer = initialize_buffer (self);
	gtk_text_view_set_buffer (GTK_TEXT_VIEW (self->priv->changes_view), buffer);
	g_signal_connect (self->priv->changes_view, "event", G_CALLBACK (view_event), self);

	gtk_tree_view_set_model (self->priv->tree_view_unstaged, GTK_TREE_MODEL (self->priv->store_unstaged));
	gtk_tree_view_set_model (self->priv->tree_view_staged, GTK_TREE_MODEL (self->priv->store_staged));

	set_icon_data_func (self, self->priv->tree_view_unstaged, GTK_CELL_RENDERER (gtk_builder_get_object (builder, "unstaged_cell_renderer_icon")));
	set_icon_data_func (self, self->priv->tree_view_staged, GTK_CELL_RENDERER (gtk_builder_get_object (builder, "staged_cell_renderer_icon")));

	GtkSourceStyleScheme *scheme;
	GtkSourceStyle *style;

	scheme = gtk_source_buffer_get_style_scheme (GTK_SOURCE_BUFFER (buffer));
	style = gtk_source_style_scheme_get_style (scheme, "current-line");

	gchar *background = NULL;
	gboolean background_set = FALSE;

	gchar *foreground = NULL;
	gboolean foreground_set = FALSE;

	if (style)
	{
		g_object_get (style,
		              "line-background",
		              &background,
		              "line-background-set",
		              &background_set,
		              "foreground",
		              &foreground,
		              "foreground-set",
		              &foreground_set,
		              NULL);

		if (!background_set)
		{
			g_object_get (style,
			              "background",
			              &background,
			              "background-set",
			              &background_set,
			              NULL);
		}
	}

	if (background_set)
	{
		self->priv->highlight_tag = gtk_text_buffer_create_tag (buffer,
		                                                        NULL,
		                                                        "paragraph-background",
		                                                        background,
		                                                        "foreground",
		                                                        foreground,
		                                                        "foreground-set",
		                                                        foreground_set,
		                                                        NULL);

		gtk_text_tag_set_priority (self->priv->highlight_tag,
		                           gtk_text_tag_table_get_size (gtk_text_buffer_get_tag_table (buffer)) - 1);

		g_signal_connect (gtk_text_buffer_get_tag_table (buffer),
		                  "tag-added",
		                  G_CALLBACK (on_tag_added),
		                  self);
	}

	GtkTreeSelection *selection;

	selection = gtk_tree_view_get_selection (self->priv->tree_view_unstaged);

	gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
	g_signal_connect (selection, "changed", G_CALLBACK (unstaged_selection_changed), self);

	selection = gtk_tree_view_get_selection (self->priv->tree_view_staged);
	gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
	g_signal_connect (selection, "changed", G_CALLBACK (staged_selection_changed), self);

	g_signal_connect (self->priv->tree_view_unstaged,
	                  "event-after",
	                  G_CALLBACK (on_unstaged_button_press),
	                  self);

	g_signal_connect (self->priv->tree_view_staged,
	                  "event-after",
	                  G_CALLBACK (on_staged_button_press),
	                  self);

	g_signal_connect (self->priv->tree_view_unstaged,
	                  "button-press-event",
	                  G_CALLBACK (on_staged_unstaged_button_press_before),
	                  self);

	g_signal_connect (self->priv->tree_view_staged,
	                  "button-press-event",
	                  G_CALLBACK (on_staged_unstaged_button_press_before),
	                  self);

	g_signal_connect (self->priv->tree_view_unstaged,
	                  "row-activated",
	                  G_CALLBACK (on_unstaged_tree_view_row_activated),
	                  self);
	g_signal_connect (self->priv->tree_view_staged,
	                  "row-activated",
	                  G_CALLBACK (on_staged_tree_view_row_activated),
	                  self);

	g_signal_connect (self->priv->tree_view_unstaged,
	                  "popup-menu",
	                  G_CALLBACK (on_unstaged_popup_menu),
	                  self);

	g_signal_connect (self->priv->tree_view_staged,
	                  "popup-menu",
	                  G_CALLBACK (on_staged_popup_menu),
	                  self);

	g_signal_connect (self->priv->changes_view,
	                  "populate-popup",
	                  G_CALLBACK (on_changes_view_popup_menu),
	                  self);

	g_signal_connect (self->priv->tree_view_unstaged,
	                  "motion-notify-event",
	                  G_CALLBACK (on_unstaged_motion),
	                  self);

	g_signal_connect (self->priv->tree_view_staged,
	                  "motion-notify-event",
	                  G_CALLBACK (on_staged_motion),
	                  self);

	g_signal_connect (gtk_builder_get_object (builder, "button_commit"),
	                  "clicked",
	                  G_CALLBACK (on_commit_clicked),
	                  self);

	g_signal_connect (self->priv->hscale_context,
	                  "value-changed",
	                  G_CALLBACK (on_context_value_changed),
	                  self);

	g_signal_connect (self->priv->check_button_amend,
	                  "toggled",
	                  G_CALLBACK (on_check_button_amend_toggled),
	                  self);

	gutter = gtk_source_view_get_gutter (self->priv->changes_view,
	                                     GTK_TEXT_WINDOW_LEFT);

	self->priv->pixbuf_renderer = gtk_source_gutter_renderer_pixbuf_new ();
	g_object_set (self->priv->pixbuf_renderer, "xpad", 4, NULL);

	gtk_source_gutter_insert (gutter, self->priv->pixbuf_renderer, 1);
	gtk_source_gutter_renderer_set_size (self->priv->pixbuf_renderer,
	                                     measure_line_height (GTK_SOURCE_VIEW (self->priv->changes_view)));

	g_signal_connect (self->priv->pixbuf_renderer,
	                  "query-data",
	                  G_CALLBACK (pixbuf_renderer_query_data_cb),
	                  self);
	g_signal_connect (self->priv->pixbuf_renderer,
	                  "query-activatable",
	                  G_CALLBACK (pixbuf_renderer_query_activatable_cb),
	                  self);
	g_signal_connect (self->priv->pixbuf_renderer,
	                  "activate",
	                  G_CALLBACK (pixbuf_renderer_activate_cb),
	                  self);
}

static void
gitg_commit_view_buildable_iface_init (GtkBuildableIface *iface)
{
	parent_iface = *iface;

	iface->parser_finished = gitg_commit_view_parser_finished;
}

static void
gitg_commit_view_dispose (GObject *object)
{
	GitgCommitView *self = GITG_COMMIT_VIEW (object);

	if (self->priv->message_settings)
	{
		g_object_unref (self->priv->message_settings);
		self->priv->message_settings = NULL;
	}

	if (self->priv->diff_settings)
	{
		g_object_unref (self->priv->diff_settings);
		self->priv->diff_settings = NULL;
	}

	if (self->priv->repository)
	{
		g_object_unref (self->priv->repository);
		self->priv->repository = NULL;
	}

	if (self->priv->commit)
	{
		g_signal_handlers_disconnect_by_func (self->priv->commit,
		                                      on_commit_file_inserted,
		                                      self);

		g_signal_handlers_disconnect_by_func (self->priv->commit,
		                                      on_commit_file_removed,
		                                      self);

		g_object_unref (self->priv->commit);
		self->priv->commit = NULL;
	}

	if (self->priv->pixbuf_renderer != NULL)
	{
		g_object_unref (self->priv->pixbuf_renderer);
		self->priv->pixbuf_renderer = NULL;
	}
}

static void
gitg_commit_view_get_property (GObject    *object,
                               guint       prop_id,
                               GValue     *value,
                               GParamSpec *pspec)
{
	GitgCommitView *self = GITG_COMMIT_VIEW (object);

	switch (prop_id)
	{
		case PROP_REPOSITORY:
			g_value_set_object (value, self->priv->repository);
		break;
		case PROP_CONTEXT_SIZE:
			g_value_set_int (value, self->priv->context_size);
		break;
		default:
			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
gitg_commit_view_set_property (GObject      *object,
                               guint         prop_id,
                               const GValue *value,
                               GParamSpec   *pspec)
{
	GitgCommitView *self = GITG_COMMIT_VIEW (object);

	switch (prop_id)
	{
		case PROP_REPOSITORY:
			self->priv->repository = g_value_dup_object (value);
		break;
		case PROP_CONTEXT_SIZE:
			self->priv->context_size = g_value_get_int (value);
		break;
		default:
			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
initialize_commit (GitgCommitView *self)
{
	if (self->priv->commit)
	{
		return;
	}

	self->priv->commit = gitg_commit_new (self->priv->repository);

	g_signal_connect (self->priv->commit,
	                  "inserted",
	                  G_CALLBACK (on_commit_file_inserted),
	                  self);

	g_signal_connect (self->priv->commit,
	                  "removed",
	                  G_CALLBACK (on_commit_file_removed),
	                  self);

	gitg_commit_refresh (self->priv->commit);
}

static void
gitg_commit_view_map (GtkWidget *widget)
{
	GitgCommitView *self = GITG_COMMIT_VIEW (widget);

	GTK_WIDGET_CLASS (gitg_commit_view_parent_class)->map (widget);

	if (!self->priv->repository)
	{
		return;
	}

	initialize_commit (self);
}

static void
gitg_commit_view_class_init (GitgCommitViewClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);
	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

	object_class->finalize = gitg_commit_view_finalize;
	object_class->dispose = gitg_commit_view_dispose;

	widget_class->map = gitg_commit_view_map;

	object_class->set_property = gitg_commit_view_set_property;
	object_class->get_property = gitg_commit_view_get_property;

	g_object_class_install_property (object_class,
	                                 PROP_REPOSITORY,
	                                 g_param_spec_object ("repository",
	                                                      "REPOSITORY",
	                                                      "Repository",
	                                                      GITG_TYPE_REPOSITORY,
	                                                      G_PARAM_READWRITE));

	g_object_class_install_property (object_class,
	                                 PROP_CONTEXT_SIZE,
	                                 g_param_spec_int ("context-size",
	                                                   "CONTEXT_SIZE",
	                                                   "Diff context size",
	                                                   1,
	                                                   G_MAXINT,
	                                                   3,
	                                                   G_PARAM_READWRITE |
	                                                   G_PARAM_CONSTRUCT));

	g_type_class_add_private (object_class, sizeof (GitgCommitViewPrivate));
}

static void
gitg_commit_view_init (GitgCommitView *self)
{
	self->priv = GITG_COMMIT_VIEW_GET_PRIVATE (self);

	self->priv->message_settings =
		g_settings_new ("org.gnome.gitg.preferences.commit.message");

	self->priv->diff_settings =
		g_settings_new ("org.gnome.gitg.preferences.diff");

	self->priv->shell = gitg_shell_new (10000);
	gitg_shell_set_preserve_line_endings (self->priv->shell, TRUE);

	self->priv->hand = gdk_cursor_new (GDK_HAND1);
}

void
gitg_commit_view_set_repository (GitgCommitView *view,
                                 GitgRepository *repository)
{
	g_return_if_fail (GITG_IS_COMMIT_VIEW (view));
	g_return_if_fail (repository == NULL || GITG_IS_REPOSITORY (repository));

	if (view->priv->repository)
	{
		g_object_unref (view->priv->repository);
		view->priv->repository = NULL;
	}

	if (view->priv->commit)
	{
		g_object_unref (view->priv->commit);
		view->priv->commit = NULL;
	}

	gtk_list_store_clear (view->priv->store_unstaged);
	gtk_list_store_clear (view->priv->store_staged);

	if (repository)
	{
		view->priv->repository = g_object_ref (repository);
	}

	if (gtk_widget_get_mapped (GTK_WIDGET (view)))
	{
		initialize_commit (view);
	}

	g_object_notify (G_OBJECT (view), "repository");
}

static void
append_file (GtkListStore    *store,
             GitgChangedFile *file,
             GitgCommitView  *view)
{
	GFile *f = gitg_changed_file_get_file (file);
	gchar *rel = gitg_repository_relative (view->priv->repository, f);

	GtkTreeIter iter;

	gtk_list_store_append (store, &iter);
	gtk_list_store_set (store,
	                    &iter,
	                    COLUMN_NAME,
	                    rel,
	                    COLUMN_FILE,
	                    file,
	                    -1);

	g_free (rel);
	g_object_unref (f);
}

/* Callbacks */
static gboolean
find_file_in_store (GtkListStore    *store,
                    GitgChangedFile *file,
                    GtkTreeIter     *iter)
{
	GtkTreeModel *model = GTK_TREE_MODEL (store);

	if (!gtk_tree_model_get_iter_first (model, iter))
	{
		return FALSE;
	}

	do
	{
		GitgChangedFile *other;
		gtk_tree_model_get (model, iter, COLUMN_FILE, &other, -1);
		gboolean ret = (other == file);

		g_object_unref (other);

		if (ret)
		{
			return TRUE;
		}
	} while (gtk_tree_model_iter_next (model, iter));

	return FALSE;
}

static void
model_row_changed (GtkListStore *store,
                   GtkTreeIter  *iter)
{
	GtkTreePath *path;

	path = gtk_tree_model_get_path (GTK_TREE_MODEL (store), iter);

	if (!path)
	{
		return;
	}

	gtk_tree_model_row_changed (GTK_TREE_MODEL (store), path, iter);
	gtk_tree_path_free (path);
}

static void
on_commit_file_changed (GitgChangedFile *file,
                        GParamSpec      *spec,
                        GitgCommitView  *view)
{
	GtkTreeIter staged;
	GtkTreeIter unstaged;
	gboolean isstaged;
	gboolean isunstaged;

	isstaged = find_file_in_store (view->priv->store_staged,
	                               file,
	                               &staged);

	isunstaged = find_file_in_store (view->priv->store_unstaged,
	                                 file,
	                                 &unstaged);

	if (isstaged)
	{
		model_row_changed (view->priv->store_staged, &staged);
	}

	if (isunstaged)
	{
		model_row_changed (view->priv->store_unstaged, &unstaged);
	}

	GitgChangedFileChanges changes = gitg_changed_file_get_changes (file);

	if (changes & GITG_CHANGED_FILE_CHANGES_CACHED)
	{
		if (!isstaged)
		{
			append_file (view->priv->store_staged, file, view);
		}
	}
	else
	{
		if (isstaged)
		{
			gtk_list_store_remove (view->priv->store_staged, &staged);
		}
	}

	if (changes & GITG_CHANGED_FILE_CHANGES_UNSTAGED)
	{
		if (!isunstaged)
		{
			append_file (view->priv->store_unstaged, file, view);
		}
	}
	else
	{
		if (isunstaged)
		{
			gtk_list_store_remove (view->priv->store_unstaged,
			                       &unstaged);
		}
	}
}

static void
on_commit_file_inserted (GitgCommit      *commit,
                         GitgChangedFile *file,
                         GitgCommitView  *view)
{
	GitgChangedFileChanges changes;

	changes = gitg_changed_file_get_changes (file);

	if (changes & GITG_CHANGED_FILE_CHANGES_UNSTAGED)
	{
		append_file (view->priv->store_unstaged, file, view);
	}

	if (changes & GITG_CHANGED_FILE_CHANGES_CACHED)
	{
		append_file (view->priv->store_staged, file, view);
	}

	g_signal_connect (file,
	                  "notify::changes",
	                  G_CALLBACK (on_commit_file_changed),
	                  view);

	g_signal_connect (file,
	                  "notify::status",
	                  G_CALLBACK (on_commit_file_changed),
	                  view);
}

static void
on_commit_file_removed (GitgCommit      *commit,
                        GitgChangedFile *file,
                        GitgCommitView  *view)
{
	GtkTreeIter iter;

	if (find_file_in_store (view->priv->store_staged, file, &iter))
	{
		gtk_list_store_remove (view->priv->store_staged, &iter);
	}

	if (find_file_in_store (view->priv->store_unstaged, file, &iter))
	{
		gtk_list_store_remove (view->priv->store_unstaged, &iter);
	}
}

static gboolean
column_icon_test (GtkTreeView      *view,
                  gdouble           ex,
                  gdouble           ey,
                  GitgChangedFile **file)
{
	GtkTreeViewColumn *column;
	gint x;
	gint y;
	GtkTreePath *path;

	gtk_tree_view_convert_widget_to_bin_window_coords (view,
	                                                   (gint)ex,
	                                                   (gint)ey,
	                                                   &x,
	                                                   &y);

	if (!gtk_tree_view_get_path_at_pos (view,
	                                    x,
	                                    y,
	                                    &path,
	                                    &column,
	                                    NULL,
	                                    NULL))
	{
		return FALSE;
	}

	if (column != gtk_tree_view_get_column (view, 0))
	{
		gtk_tree_path_free (path);
		return FALSE;
	}

	if (file)
	{
		GtkTreeModel *model = gtk_tree_view_get_model (view);
		GtkTreeIter iter;

		gtk_tree_model_get_iter (model, &iter, path);
		gtk_tree_model_get (model, &iter, COLUMN_FILE, file, -1);
	}

	gtk_tree_path_free (path);

	return TRUE;
}

static gboolean
on_staged_unstaged_button_press_before (GtkWidget      *widget,
                                        GdkEventButton *event,
                                        GitgCommitView *view)
{
	if (event->button == 1 &&
	    column_icon_test (GTK_TREE_VIEW (widget),
	                      event->x,
	                      event->y,
	                      NULL))
	{
		/* Block selection by treeview when clicking on the icon */
		return TRUE;
	}

	if (event->button != 3)
	{
		return FALSE;
	}

	/* Check if it is important to keep the selection here */
	GtkTreeView *treeview = GTK_TREE_VIEW (widget);
	GtkTreePath *path;

	if (gtk_tree_view_get_path_at_pos (treeview,
	                                   (gint)event->x,
	                                   (gint)event->y,
	                                   &path,
	                                   NULL,
	                                   NULL,
	                                   NULL))
	{
		GtkTreeSelection *selection =
			gtk_tree_view_get_selection (treeview);

		if (gtk_tree_selection_path_is_selected (selection, path))
		{
			/* Block normal treeview behavior to unselect potential
			   multiselection */
			return TRUE;
		}
	}

	return FALSE;
}

static void
on_unstaged_tree_view_row_activated (GtkTreeView       *tree_view,
                                     GtkTreePath       *path,
                                     GtkTreeViewColumn *column,
                                     GitgCommitView    *view)
{
	GList *files = NULL;

	get_selected_files (view->priv->tree_view_unstaged,
	                    &files,
	                    NULL,
	                    NULL,
	                    NULL);

	gitg_commit_stage (view->priv->commit, files->data, NULL, NULL);
	g_list_free_full (files, (GDestroyNotify)g_object_unref);
}

static void
on_staged_tree_view_row_activated (GtkTreeView       *tree_view,
                                   GtkTreePath       *path,
                                   GtkTreeViewColumn *column,
                                   GitgCommitView    *view)
{
	GList *files = NULL;

	get_selected_files (view->priv->tree_view_staged,
	                    &files,
	                    NULL,
	                    NULL,
	                    NULL);

	gitg_commit_unstage (view->priv->commit, files->data, NULL, NULL);
	g_list_free_full (files, (GDestroyNotify)g_object_unref);
}

static void
on_unstaged_button_press (GtkWidget      *widget,
                          GdkEventButton *event,
                          GitgCommitView *view)
{
	GitgChangedFile *file;

	if (event->type != GDK_BUTTON_PRESS)
	{
		return;
	}

	if (event->button == 1 &&
	    column_icon_test (view->priv->tree_view_unstaged,
	                     event->x,
	                     event->y,
	                     &file))
	{
		GList *files = NULL;

		gitg_commit_stage (view->priv->commit, file, NULL, NULL);

		/* If the file is currently selected in the 'staged' tree,
		   then refresh the diff */
		get_selected_files (view->priv->tree_view_staged,
		                    &files,
		                    NULL,
		                    NULL,
		                    NULL);

		if (files && !files->next)
		{
			GFile *f;

			f = gitg_changed_file_get_file (files->data);

			if (gitg_changed_file_equal (file, f))
			{
				GtkTreeSelection *selection;

				selection = gtk_tree_view_get_selection (
					view->priv->tree_view_staged);

				staged_selection_changed (selection, view);
			}

			g_object_unref (f);
		}

		g_list_free_full (files, (GDestroyNotify)g_object_unref);
		g_object_unref (file);
	}
	else if (event->button == 3)
	{
		view->priv->context_type = CONTEXT_TYPE_FILE;
		popup_unstaged_menu (view, event);
	}
}

static void
on_staged_button_press (GtkWidget      *widget,
                        GdkEventButton *event,
                        GitgCommitView *view)
{
	GitgChangedFile *file;

	if (event->type != GDK_BUTTON_PRESS)
	{
		return;
	}

	if (event->button == 1 &&
	    column_icon_test (view->priv->tree_view_staged,
	                      event->x,
	                      event->y,
	                      &file))
	{
		GList *files = NULL;

		gitg_commit_unstage (view->priv->commit, file, NULL, NULL);

		/* If the file is currently selected in the 'unstaged' tree,
		   then refresh the diff */
		get_selected_files (view->priv->tree_view_unstaged,
		                    &files,
		                    NULL,
		                    NULL,
		                    NULL);

		if (files && !files->next)
		{
			GFile *f;

			f = gitg_changed_file_get_file (files->data);

			if (gitg_changed_file_equal (file, f))
			{
				GtkTreeSelection *selection;

				selection = gtk_tree_view_get_selection (
					view->priv->tree_view_unstaged);

				unstaged_selection_changed (selection, view);
			}
		}

		g_list_free_full (files, (GDestroyNotify)g_object_unref);
		g_object_unref (file);
	}
	else if (event->button == 3)
	{
		view->priv->context_type = CONTEXT_TYPE_FILE;
		popup_staged_menu (view, event);
	}
}

static gboolean
on_unstaged_motion (GtkWidget      *widget,
                    GdkEventMotion *event,
                    GitgCommitView *view)
{
	if (column_icon_test (view->priv->tree_view_unstaged,
	                      event->x,
	                      event->y,
	                      NULL))
	{
		gdk_window_set_cursor (gtk_widget_get_window (widget),
		                       view->priv->hand);
	}
	else
	{
		gdk_window_set_cursor (gtk_widget_get_window (widget), NULL);
	}

	return FALSE;
}

static gboolean
on_staged_motion (GtkWidget      *widget,
                  GdkEventMotion *event,
                  GitgCommitView *view)
{
	if (column_icon_test (view->priv->tree_view_staged,
	                      event->x,
	                      event->y,
	                      NULL))
	{
		gdk_window_set_cursor (gtk_widget_get_window (widget),
		                       view->priv->hand);
	}
	else
	{
		gdk_window_set_cursor (gtk_widget_get_window (widget), NULL);
	}

	return FALSE;
}

static gchar *
get_comment (GitgCommitView *view)
{
	GtkTextBuffer *buffer;
	GtkTextIter start;
	GtkTextIter end;

	buffer = gtk_text_view_get_buffer (view->priv->comment_view);

	gtk_text_buffer_get_bounds (buffer, &start, &end);
	gchar *text = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
	gchar *ptr;

	for (ptr = text; *ptr; ptr = g_utf8_next_char (ptr))
		if (!g_unichar_isspace (g_utf8_get_char (ptr)))
		{
			return text;
		}

	g_free (text);
	return NULL;
}

static void
show_error (GitgCommitView *view,
            gchar const    *error)
{
	GtkWidget *dlg;

	dlg = gtk_message_dialog_new (GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view))),
	                              GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
	                              GTK_MESSAGE_ERROR,
	                              GTK_BUTTONS_OK,
	                              "%s",
	                              error);

	gtk_dialog_run (GTK_DIALOG (dlg));
	gtk_widget_destroy (dlg);
}

static void
on_commit_clicked (GtkButton      *button,
                   GitgCommitView *view)
{
	gchar *comment;
	gboolean signoff;
	gboolean amend;

	if (!gitg_commit_has_changes (view->priv->commit))
	{
		show_error (view, _("You must first stage some changes before committing"));
		return;
	}

	comment = get_comment (view);

	if (!comment)
	{
		show_error (view, _("Please enter a commit message before committing"));
		return;
	}

	signoff = gtk_toggle_button_get_active (
		GTK_TOGGLE_BUTTON (view->priv->check_button_signed_off_by));

	amend = gtk_toggle_button_get_active (
		GTK_TOGGLE_BUTTON (view->priv->check_button_amend));

	GError *error = NULL;

	if (!gitg_commit_commit (view->priv->commit,
	                         comment,
	                         signoff,
	                         amend,
	                         &error))
	{
		if (error &&
		    error->domain == GITG_COMMIT_ERROR &&
		    error->code == GITG_COMMIT_ERROR_SIGNOFF)
		{
			show_error (view, _("Your user name or email could not be retrieved for use in the sign off message"));
		}
		else
		{
			gchar *msg;

			msg = g_strconcat (_("Something went wrong while trying to commit"),
			                   ":\n\n",
			                   error->message,
			                   NULL);

			show_error (view, msg);
			g_free (msg);
		}

		if (error)
		{
			g_error_free (error);
		}
	}
	else
	{
		gtk_text_buffer_set_text (
			gtk_text_view_get_buffer (view->priv->comment_view),
			"",
			-1);

		gtk_toggle_button_set_active (
			GTK_TOGGLE_BUTTON (view->priv->check_button_amend),
			FALSE);

		gtk_toggle_button_set_active (
			GTK_TOGGLE_BUTTON (view->priv->check_button_signed_off_by),
			FALSE);
	}

	g_free (comment);
}

static void
on_context_value_changed (GtkHScale      *scale,
                          GitgCommitView *view)
{
	view->priv->context_size = (gint)gtk_range_get_value (GTK_RANGE (scale));

	if (view->priv->current_changes & GITG_CHANGED_FILE_CHANGES_UNSTAGED)
	{
		unstaged_selection_changed (
			gtk_tree_view_get_selection (view->priv->tree_view_unstaged),
			view);
	}
	else if (view->priv->current_changes & GITG_CHANGED_FILE_CHANGES_CACHED)
	{
		staged_selection_changed (
			gtk_tree_view_get_selection (view->priv->tree_view_staged),
			view);
	}
}

static gboolean
set_unstaged_popup_status (GitgCommitView *view)
{
	GitgChangedFileChanges changes;
	GitgChangedFileStatus status;
	GtkAction *revert;
	GtkAction *ignore;
	GtkAction *edit;
	GtkAction *delete;

	if (!get_selected_files (view->priv->tree_view_unstaged,
	                         NULL,
	                         NULL,
	                         &changes,
	                         &status))
	{
		return FALSE;
	}

	revert = gtk_ui_manager_get_action (view->priv->ui_manager,
	                                    "/ui/popup_commit_stage/RevertChangesAction");

	ignore = gtk_ui_manager_get_action (view->priv->ui_manager,
	                                    "/ui/popup_commit_stage/IgnoreFileAction");

	edit = gtk_ui_manager_get_action (view->priv->ui_manager,
	                                  "/ui/popup_commit_stage/EditFileAction");

	delete = gtk_ui_manager_get_action (view->priv->ui_manager,
	                                    "/ui/popup_commit_stage/DeleteFileAction");

	gtk_action_set_visible (revert, status == GITG_CHANGED_FILE_STATUS_MODIFIED ||
	                               status == GITG_CHANGED_FILE_STATUS_DELETED);
	gtk_action_set_visible (ignore, status == GITG_CHANGED_FILE_STATUS_NEW);

	gtk_action_set_visible (edit, status != GITG_CHANGED_FILE_STATUS_DELETED);
	gtk_action_set_visible (delete, status == GITG_CHANGED_FILE_STATUS_NEW);

	return TRUE;
}

static gboolean
set_staged_popup_status (GitgCommitView *view)
{
	GitgChangedFileStatus status;
	GtkAction *edit;

	if (!get_selected_files (view->priv->tree_view_staged,
	                         NULL,
	                         NULL,
	                         NULL,
	                         &status))
	{
		return FALSE;
	}

	edit = gtk_ui_manager_get_action (view->priv->ui_manager,
	                                  "/ui/popup_commit_stage/EditFileAction");

	gtk_action_set_visible (edit, status != GITG_CHANGED_FILE_STATUS_DELETED);

	return TRUE;
}

static gboolean
popup_unstaged_menu (GitgCommitView *view,
                     GdkEventButton *event)
{
	GtkWidget *wd;

	if (!set_unstaged_popup_status (view))
	{
		return FALSE;
	}

	wd = gtk_ui_manager_get_widget (view->priv->ui_manager,
	                                "/ui/popup_commit_stage");

	view->priv->context_type = CONTEXT_TYPE_FILE;

	if (event)
	{
		gtk_menu_popup (GTK_MENU (wd),
		                NULL,
		                NULL,
		                NULL,
		                NULL,
		                event->button,
		                event->time);
	}
	else
	{
		gtk_menu_popup (GTK_MENU (wd),
		                NULL,
		                NULL,
		                gitg_utils_menu_position_under_tree_view,
		                view->priv->tree_view_staged,
		                0,
		                gtk_get_current_event_time ());
	}

	return TRUE;
}

static gboolean
popup_staged_menu (GitgCommitView *view,
                   GdkEventButton *event)
{
	GtkWidget *wd;

	if (!set_staged_popup_status (view))
	{
		return FALSE;
	}

	wd = gtk_ui_manager_get_widget (view->priv->ui_manager,
	                                "/ui/popup_commit_unstage");

	view->priv->context_type = CONTEXT_TYPE_FILE;

	if (event)
	{
		gtk_menu_popup (GTK_MENU (wd),
		                NULL,
		                NULL,
		                NULL,
		                NULL,
		                event->button,
		                event->time);
	}
	else
	{
		gtk_menu_popup (GTK_MENU (wd),
		                NULL,
		                NULL,
		                gitg_utils_menu_position_under_tree_view,
		                view->priv->tree_view_unstaged,
		                0,
		                gtk_get_current_event_time ());
	}

	return TRUE;
}


static gboolean
on_unstaged_popup_menu (GtkWidget      *widget,
                        GitgCommitView *view)
{
	return popup_unstaged_menu (view, NULL);
}

static gboolean
on_staged_popup_menu (GtkWidget      *widget,
                      GitgCommitView *view)
{
	return popup_staged_menu (view, NULL);
}

static void
on_stage_changes (GtkAction      *action,
                  GitgCommitView *view)
{
	if (view->priv->context_type == CONTEXT_TYPE_FILE)
	{
		GList *files = NULL;
		GList *item;

		get_selected_files (view->priv->tree_view_unstaged,
		                    &files,
		                    NULL,
		                    NULL,
		                    NULL);

		for (item = files; item; item = g_list_next (item))
		{
			gitg_commit_stage (view->priv->commit,
			                   GITG_CHANGED_FILE (item->data),
			                   NULL,
			                   NULL);
		}

		g_list_free_full (files, (GDestroyNotify)g_object_unref);
	}
	else
	{
		handle_stage_unstage (view, &view->priv->context_iter);
	}
}

static void
do_revert_changes (GitgCommitView *view)
{
	gboolean ret = TRUE;

	if (view->priv->context_type == CONTEXT_TYPE_FILE)
	{
		GList *files = NULL;
		GList *item;

		get_selected_files (view->priv->tree_view_unstaged,
		                    &files,
		                    NULL,
		                    NULL,
		                    NULL);

		for (item = files; item; item = g_list_next (item))
		{
			ret &= gitg_commit_undo (view->priv->commit,
			                         GITG_CHANGED_FILE (item->data),
			                         NULL,
			                         NULL);
		}

		g_list_free_full (files, (GDestroyNotify)g_object_unref);
	}
	else
	{
		GitgChangedFile *file;
		gchar *hunk;

		file = g_object_ref (view->priv->current_file);

		hunk = get_hunk_patch (view, &view->priv->context_iter);

		ret = gitg_commit_undo (view->priv->commit,
		                        view->priv->current_file,
		                        hunk,
		                        NULL);

		g_free (hunk);

		if (ret && view->priv->current_file == file)
		{
			gitg_diff_view_remove_hunk (GITG_DIFF_VIEW (view->priv->changes_view),
			                            &view->priv->context_iter);
		}

		g_object_unref (file);
	}

	if (!ret)
	{
		show_error (view, _("Revert fail"));
	}
}

static void
on_revert_changes (GtkAction      *action,
                   GitgCommitView *view)
{
	GtkWidget *dialog;
	gint response;

	dialog = gtk_message_dialog_new (GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view))),
	                                 GTK_DIALOG_MODAL,
	                                 GTK_MESSAGE_QUESTION,
	                                 GTK_BUTTONS_YES_NO,
	                                 "%s",
	                                 _("Are you sure you want to revert these changes?"));

	gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
	                                          "%s",
	                                          _("Reverting changes is permanent and cannot be undone"));

	response = gtk_dialog_run (GTK_DIALOG (dialog));

	if (response == GTK_RESPONSE_YES)
	{
		do_revert_changes (view);
	}

	gtk_widget_destroy (dialog);
}

static void
on_edit_file (GtkAction      *action,
              GitgCommitView *view)
{
	GList *files = NULL;
	GList *item;

	get_selected_files (view->priv->tree_view_unstaged,
	                    &files,
	                    NULL,
	                    NULL,
	                    NULL);

	for (item = files; item; item = g_list_next (item))
	{
		GitgChangedFile *file = item->data;

		if (gitg_changed_file_get_status (file) ==
		    GITG_CHANGED_FILE_STATUS_DELETED)
		{
			continue;
		}

		GFile *location = gitg_changed_file_get_file (file);
		gchar *uri = g_file_get_uri (location);

		gtk_show_uri (gtk_widget_get_screen (GTK_WIDGET (view)),
		              uri,
		              GDK_CURRENT_TIME,
		              NULL);

		g_free (uri);
		g_object_unref (location);
	}

	g_list_free_full (files, (GDestroyNotify)g_object_unref);
}

static void
do_delete_file (GitgCommitView *view)
{
	GList *files = NULL;
	GList *item;
	gboolean success = TRUE;

	get_selected_files (view->priv->tree_view_unstaged,
	                    &files,
	                    NULL,
	                    NULL,
	                    NULL);

	for (item = files; item; item = g_list_next (item))
	{
		GitgChangedFile *file = item->data;
		GFile *location = gitg_changed_file_get_file (file);

		success &= g_file_delete (location, NULL, NULL);

		g_object_unref (location);
	}

	g_list_free_full (files, (GDestroyNotify)g_object_unref);

	gitg_commit_refresh (view->priv->commit);

	if (!success)
	{
		show_error (view, _("Delete Failed"));
	}
}

static void
on_delete_file (GtkAction      *action,
                GitgCommitView *view)
{
	GtkWidget *toplevel;
	GtkWidget *dialog;

	toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));

	dialog = gtk_message_dialog_new (GTK_WINDOW (toplevel),
	                                 GTK_DIALOG_MODAL,
	                                 GTK_MESSAGE_QUESTION,
	                                 GTK_BUTTONS_YES_NO,
	                                 "%s",
	                                 _("Are you sure you want to delete these files?"));

	gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog), "%s",
	                                          _("Deleting files is permanent "
	                                            "and cannot be undone"));

	if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_YES)
	{
		do_delete_file (view);
	}

	gtk_widget_destroy (dialog);
}

static void
on_ignore_file (GtkAction      *action,
                GitgCommitView *view)
{
	GList *files = NULL;
	GList *item;

	get_selected_files (view->priv->tree_view_unstaged,
	                    &files,
	                    NULL,
	                    NULL,
	                    NULL);

	for (item = files; item; item = g_list_next (item))
	{
		gitg_commit_add_ignore (view->priv->commit,
		                        GITG_CHANGED_FILE (item->data),
		                        NULL);
	}

	g_list_free_full (files, (GDestroyNotify)g_object_unref);
}

static void
on_unstage_changes (GtkAction      *action,
                    GitgCommitView *view)
{
	if (view->priv->context_type == CONTEXT_TYPE_FILE)
	{
		GList *files = NULL;
		GList *item;

		get_selected_files (view->priv->tree_view_staged,
		                    &files,
		                    NULL,
		                    NULL,
		                    NULL);

		for (item = files; item; item = g_list_next (item))
		{
			gitg_commit_unstage (view->priv->commit,
			                     GITG_CHANGED_FILE (item->data),
			                     NULL,
			                     NULL);
		}

		g_list_free_full (files, (GDestroyNotify)g_object_unref);
	}
	else
	{
		handle_stage_unstage (view, &view->priv->context_iter);
	}
}

static GtkWidget *
create_context_menu_item (GitgCommitView *view,
                          gchar const    *action)
{
	GtkAction *ac;

	ac = gtk_action_group_get_action (view->priv->group_context, action);

	return gtk_action_create_menu_item (ac);
}

static void
on_changes_view_popup_menu (GtkTextView    *textview,
                            GtkMenu        *menu,
                            GitgCommitView *view)
{
	gboolean is_hunk;

	get_info_at_pointer (view,
	                     &view->priv->context_iter,
	                     &is_hunk,
	                     NULL,
	                     NULL);

	if (!is_hunk)
	{
		return;
	}

	GtkWidget *separator = gtk_separator_menu_item_new ();
	gtk_widget_show (separator);

	view->priv->context_type = CONTEXT_TYPE_HUNK;

	gtk_menu_shell_append (GTK_MENU_SHELL (menu), separator);

	if (view->priv->current_changes & GITG_CHANGED_FILE_CHANGES_CACHED)
	{
		GtkWidget *unstage;

		unstage = create_context_menu_item (view, "UnstageChangesAction");
		gtk_menu_shell_append (GTK_MENU_SHELL (menu), unstage);
	}
	else
	{
		GtkWidget *stage;
		GtkWidget *revert;

		stage = create_context_menu_item (view, "StageChangesAction");
		revert = create_context_menu_item (view, "RevertChangesAction");

		gtk_menu_shell_append (GTK_MENU_SHELL (menu), stage);
		gtk_menu_shell_append (GTK_MENU_SHELL (menu), revert);
	}
}

static void
on_check_button_amend_toggled (GtkToggleButton *button,
                               GitgCommitView  *view)
{
	gboolean active;
	GtkTextBuffer *buffer;
	GtkTextIter start;
	GtkTextIter end;

	active = gtk_toggle_button_get_active (button);
	buffer = gtk_text_view_get_buffer (view->priv->comment_view);

	gtk_text_buffer_get_bounds (buffer, &start, &end);

	if (active && gtk_text_iter_compare (&start, &end) == 0)
	{
		// Get last commit message
		gchar *message;

		message = gitg_commit_amend_message (view->priv->commit);

		if (message)
		{
			gtk_text_buffer_set_text (buffer, message, -1);
		}

		g_free (message);
	}
}

static void
pixbuf_renderer_query_data_cb (GtkSourceGutterRenderer      *renderer,
                               GtkTextIter                  *start,
                               GtkTextIter                  *end,
                               GtkSourceGutterRendererState  state,
                               GitgCommitView               *view)
{
	GitgDiffView *diff_view;
	const gchar *stock_id;

	diff_view = GITG_DIFF_VIEW (view->priv->changes_view);

	switch (gitg_diff_view_get_line_type (diff_view, start))
	{
		case GITG_DIFF_LINE_TYPE_NONE:
			stock_id = GTK_STOCK_DISCARD;
			break;
		case GITG_DIFF_LINE_TYPE_ADD:
			stock_id = GTK_STOCK_ADD;
			break;
		case GITG_DIFF_LINE_TYPE_REMOVE:
			stock_id = GTK_STOCK_REMOVE;
			break;
		default:
			g_return_if_reached ();
	}

	g_object_set (renderer,
	              "stock-id", stock_id,
	              NULL);
}

static gboolean
pixbuf_renderer_query_activatable_cb (GtkSourceGutterRenderer *renderer,
                                      GtkTextIter             *iter,
                                      GdkRectangle            *area,
                                      GdkEvent                *event,
                                      GitgCommitView          *view)
{
	GitgDiffView *diff_view = GITG_DIFF_VIEW (view->priv->changes_view);
	GitgDiffLineType line_type;

	line_type = gitg_diff_view_get_line_type (diff_view, iter);

	return line_type != GITG_DIFF_LINE_TYPE_NONE &&
	       ((GdkEventButton *) event)->button == 1;
}

static void
pixbuf_renderer_activate_cb (GtkSourceGutterRenderer *renderer,
                             GtkTextIter             *iter,
                             GdkRectangle            *area,
                             GdkEvent                *event,
                             GitgCommitView          *view)
{
	handle_stage_unstage_line (view, iter);
}
