view_file_list.c

来自「Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。」· C语言 代码 · 共 1,819 行 · 第 1/3 页

	gtk_tree_view_column_set_fixed_width(column, (thumb) ? thumb_max_width : 4);

	list = gtk_tree_view_column_get_cell_renderers(column);
	if (!list) return;
	cell = list->data;
	g_list_free(list);

	g_object_set(G_OBJECT(cell), "height", (thumb) ? thumb_max_height : -1, NULL);
	gtk_tree_view_columns_autosize(GTK_TREE_VIEW(listview));
}

static void vflist_populate_view(ViewFileList *vfl)
{
	GtkListStore *store;
	GtkTreeIter iter;
	gint thumbs;
	GList *work;
	GtkTreeRowReference *visible_row = NULL;
	GtkTreePath *tpath;
	gint valid;

	store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(vfl->listview)));
	thumbs = vfl->thumbs_enabled;

	vflist_thumb_stop(vfl);

	if (!vfl->list)
		{
		gtk_list_store_clear(store);
		vflist_send_update(vfl);
		return;
		}

	if (GTK_WIDGET_REALIZED(vfl->listview) &&
	    gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(vfl->listview), 0, 0, &tpath, NULL, NULL, NULL))
		{
		visible_row = gtk_tree_row_reference_new(GTK_TREE_MODEL(store), tpath);
		gtk_tree_path_free(tpath);
		}

	vflist_listview_set_height(vfl->listview, thumbs);

	valid = gtk_tree_model_get_iter_first(GTK_TREE_MODEL(store), &iter);

	work = vfl->list;
	while (work)
		{
		gint match;
		FileData *fd = work->data;
		gint done = FALSE;

		while (!done)
			{
			FileData *old_fd = NULL;

			if (valid)
				{
				gtk_tree_model_get(GTK_TREE_MODEL(store), &iter, FILE_COLUMN_POINTER, &old_fd, -1);
				match = CASE_SORT(fd->name, old_fd->name);
				}
			else
				{
				match = -1;
				}

			if (match < 0)
				{
				GtkTreeIter new;
				gchar *size;

				size = text_from_size(fd->size);
				if (valid)
					{
					gtk_list_store_insert_before(store, &new, &iter);
					}
				else
					{
					gtk_list_store_append(store, &new);
					}
				gtk_list_store_set(store, &new, FILE_COLUMN_POINTER, fd,
								FILE_COLUMN_THUMB, (thumbs) ? fd->pixbuf : NULL,
								FILE_COLUMN_NAME, fd->name,
								FILE_COLUMN_SIZE, size,
								FILE_COLUMN_DATE, text_from_time(fd->date),
								FILE_COLUMN_COLOR, FALSE, -1);
				g_free(size);

				done = TRUE;
				}
			else if (match > 0)
				{
				valid = gtk_list_store_remove(store, &iter);
				}
			else
				{
				gtk_list_store_set(store, &iter, FILE_COLUMN_POINTER, fd, -1);
				if (fd->date != old_fd->date)
					{
					gchar *size;

					/* update, file changed */
					size = text_from_size(fd->size);
					gtk_list_store_set(store, &iter, FILE_COLUMN_SIZE, size,
									 FILE_COLUMN_DATE, text_from_time(fd->date), -1);
					g_free(size);
					}
				else if (fd != old_fd)
					{
					/* preserve thumbnail */
					if (fd->pixbuf) g_object_unref(fd->pixbuf);
					fd->pixbuf = old_fd->pixbuf;
					if (fd->pixbuf) g_object_ref(fd->pixbuf);
					}

				gtk_list_store_set(store, &iter, FILE_COLUMN_THUMB, (thumbs) ? fd->pixbuf : NULL, -1);

				if (vfl->select_fd == old_fd) vfl->select_fd = fd;

				if (valid) valid = gtk_tree_model_iter_next(GTK_TREE_MODEL(store), &iter);

				done = TRUE;
				}
			}
		work = work->next;
		}

	while (valid)
		{
		valid = gtk_list_store_remove(store, &iter);
		}

	if (visible_row)
		{
		if (gtk_tree_row_reference_valid(visible_row))
			{
			tpath = gtk_tree_row_reference_get_path(visible_row);
			gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW(vfl->listview), tpath, NULL, TRUE, 0.0, 0.0);
			gtk_tree_path_free(tpath);
			}
		gtk_tree_row_reference_free(visible_row);
		}

	vflist_send_update(vfl);
	vflist_thumb_update(vfl);
}

gint vflist_refresh(ViewFileList *vfl)
{
	GList *old_list;
	gint ret = TRUE;

	old_list = vfl->list;
	vfl->list = NULL;

	if (vfl->path)
		{
		ret = filelist_read(vfl->path, &vfl->list, NULL);
		}

	vfl->list = filelist_sort(vfl->list, vfl->sort_method, vfl->sort_ascend);
	vflist_populate_view(vfl);

	filelist_free(old_list);

	return ret;
}

/* this overrides the low default of a GtkCellRenderer from 100 to CELL_HEIGHT_OVERRIDE, something sane for our purposes */

#define CELL_HEIGHT_OVERRIDE 512

static void cell_renderer_height_override(GtkCellRenderer *renderer)
{
	GParamSpec *spec;

	spec = g_object_class_find_property(G_OBJECT_GET_CLASS(G_OBJECT(renderer)), "height");
	if (spec && G_IS_PARAM_SPEC_INT(spec))
		{
		GParamSpecInt *spec_int;

		spec_int = G_PARAM_SPEC_INT(spec);
		if (spec_int->maximum < CELL_HEIGHT_OVERRIDE) spec_int->maximum = CELL_HEIGHT_OVERRIDE;
		}
}

static GdkColor *vflist_listview_color_shifted(GtkWidget *widget)
{
	static GdkColor color;
	static GtkWidget *done = NULL;

	if (done != widget)
		{
		GtkStyle *style;

		style = gtk_widget_get_style(widget);
		memcpy(&color, &style->base[GTK_STATE_NORMAL], sizeof(color));
		shift_color(&color, -1, 0);
		done = widget;
		}

	return &color;
}

static void vflist_listview_color_cb(GtkTreeViewColumn *tree_column, GtkCellRenderer *cell,
				     GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
{
	ViewFileList *vfl = data;
	gboolean set;

	gtk_tree_model_get(tree_model, iter, FILE_COLUMN_COLOR, &set, -1);
	g_object_set(G_OBJECT(cell),
		     "cell-background-gdk", vflist_listview_color_shifted(vfl->listview),
		     "cell-background-set", set, NULL);
}

static void vflist_listview_add_column(ViewFileList *vfl, gint n, const gchar *title, gint image, gint right_justify)
{
	GtkTreeViewColumn *column;
	GtkCellRenderer *renderer;

	column = gtk_tree_view_column_new();
	gtk_tree_view_column_set_title(column, title);
	gtk_tree_view_column_set_min_width(column, 4);

	if (!image)
		{
		gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_GROW_ONLY);
		renderer = gtk_cell_renderer_text_new();
		if (right_justify)
			{
			g_object_set(G_OBJECT(renderer), "xalign", 1.0, NULL);
			}
		gtk_tree_view_column_pack_start(column, renderer, TRUE);
		gtk_tree_view_column_add_attribute(column, renderer, "text", n);
		}
	else
		{
		gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
		renderer = gtk_cell_renderer_pixbuf_new();
		cell_renderer_height_override(renderer);
		gtk_tree_view_column_pack_start(column, renderer, TRUE);
		gtk_tree_view_column_add_attribute(column, renderer, "pixbuf", n);
		}

	gtk_tree_view_column_set_cell_data_func(column, renderer, vflist_listview_color_cb, vfl, NULL);

	gtk_tree_view_append_column(GTK_TREE_VIEW(vfl->listview), column);
}

/*
 *-----------------------------------------------------------------------------
 * base
 *-----------------------------------------------------------------------------
 */

gint vflist_set_path(ViewFileList *vfl, const gchar *path)
{
	GtkListStore *store;

	if (!path) return FALSE;
	if (vfl->path && strcmp(path, vfl->path) == 0) return TRUE;

	g_free(vfl->path);
	vfl->path = g_strdup(path);

	/* force complete reload */
	store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(vfl->listview)));
	gtk_list_store_clear(store);

	filelist_free(vfl->list);
	vfl->list = NULL;

	return vflist_refresh(vfl);
}

static void vflist_destroy_cb(GtkWidget *widget, gpointer data)
{
	ViewFileList *vfl = data;

	if (vfl->popup)
		{
		g_signal_handlers_disconnect_matched(G_OBJECT(vfl->popup), G_SIGNAL_MATCH_DATA,
						     0, 0, 0, NULL, vfl);
		gtk_widget_destroy(vfl->popup);
		}

	vflist_select_idle_cancel(vfl);
	vflist_thumb_stop(vfl);

	g_free(vfl->path);
	filelist_free(vfl->list);
	g_free(vfl);
}

ViewFileList *vflist_new(const gchar *path, gint thumbs)
{
	ViewFileList *vfl;
	GtkListStore *store;
	GtkTreeSelection *selection;

	vfl = g_new0(ViewFileList, 1);

	vfl->path = NULL;
	vfl->list = NULL;
	vfl->click_fd = NULL;
	vfl->select_fd = NULL;
	vfl->sort_method = SORT_NAME;
	vfl->sort_ascend = TRUE;
	vfl->thumbs_enabled = thumbs;

	vfl->thumbs_running = FALSE;
	vfl->thumbs_count = 0;
	vfl->thumbs_loader = NULL;
	vfl->thumbs_filedata = NULL;

	vfl->select_idle_id = -1;

	vfl->popup = NULL;

	vfl->widget = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(vfl->widget), GTK_SHADOW_IN);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(vfl->widget),
				       GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
	g_signal_connect(G_OBJECT(vfl->widget), "destroy",
			 G_CALLBACK(vflist_destroy_cb), vfl);

	store = gtk_list_store_new(6, G_TYPE_POINTER, GDK_TYPE_PIXBUF, G_TYPE_STRING,
				   G_TYPE_STRING, G_TYPE_STRING, G_TYPE_BOOLEAN);
	vfl->listview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
	g_object_unref(store);

	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(vfl->listview));
	gtk_tree_selection_set_mode(GTK_TREE_SELECTION(selection), GTK_SELECTION_MULTIPLE);
	gtk_tree_selection_set_select_function(selection, vflist_select_cb, vfl, NULL);

	gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(vfl->listview), FALSE);
	gtk_tree_view_set_enable_search(GTK_TREE_VIEW(vfl->listview), FALSE);

	vflist_listview_add_column(vfl, FILE_COLUMN_THUMB, "", TRUE, FALSE);
	vflist_listview_add_column(vfl, FILE_COLUMN_NAME, _("Name"), FALSE, FALSE);
	vflist_listview_add_column(vfl, FILE_COLUMN_SIZE, _("Size"), FALSE, TRUE);
	vflist_listview_add_column(vfl, FILE_COLUMN_DATE, _("Date"), FALSE, TRUE);

	g_signal_connect(G_OBJECT(vfl->listview), "key_press_event",
			 G_CALLBACK(vflist_press_key_cb), vfl);

	gtk_container_add (GTK_CONTAINER(vfl->widget), vfl->listview);
	gtk_widget_show(vfl->listview);

	vflist_dnd_init(vfl);

	g_signal_connect(G_OBJECT(vfl->listview), "button_press_event",
			 G_CALLBACK(vflist_press_cb), vfl);
	g_signal_connect(G_OBJECT(vfl->listview), "button_release_event",
			 G_CALLBACK(vflist_release_cb), vfl);

	if (path) vflist_set_path(vfl, path);

	return vfl;
}

void vflist_set_status_func(ViewFileList *vfl,
			    void (*func)(ViewFileList *vfl, gpointer data), gpointer data)
{
	vfl->func_status = func;
	vfl->data_status = data;
}

void vflist_set_thumb_status_func(ViewFileList *vfl,
				  void (*func)(ViewFileList *vfl, gdouble val, const gchar *text, gpointer data),
				  gpointer data)
{
	vfl->func_thumb_status = func;
	vfl->data_thumb_status = data;
}

void vflist_thumb_set(ViewFileList *vfl, gint enable)
{
	if (vfl->thumbs_enabled == enable) return;

	vfl->thumbs_enabled = enable;
	vflist_refresh(vfl);
}

void vflist_set_layout(ViewFileList *vfl, LayoutWindow *layout)
{
	vfl->layout = layout;
}

/*
 *-----------------------------------------------------------------------------
 * maintenance (for rename, move, remove)
 *-----------------------------------------------------------------------------
 */

static gint vflist_maint_find_closest(ViewFileList *vfl, gint row, gint count, GList *ignore_list)
{
	GList *list = NULL;
	GList *work;
	gint rev = row - 1;
	row ++;

	work = ignore_list;
	while (work)
		{
		gint f = vflist_index_by_path(vfl, work->data);
		if (f >= 0) list = g_list_prepend(list, GINT_TO_POINTER(f));
		work = work->next;
		}

	while (list)
		{
		gint c = TRUE;
		work = list;
		while (work && c)
			{
			gpointer p = work->data;
			work = work->next;
			if (row == GPOINTER_TO_INT(p))
				{
				row++;
				c = FALSE;
				}
			if (rev == GPOINTER_TO_INT(p))
				{
				rev--;
				c = FALSE;
				}
			if (!c) list = g_list_remove(list, p);
			}
		if (c && list)
			{
			g_list_free(list);
			list = NULL;
			}
		}
	if (row > count - 1)
		{
		if (rev < 0)
			return -1;
		else
			return rev;
		}
	else
		{
		return row;
		}
}

gint vflist_maint_renamed(ViewFileList *vfl, const gchar *source, const gchar *dest)
{
	gint ret = FALSE;
	gint row;
	gchar *source_base;
	gchar *dest_base;
	GList *work;
	FileData *fd;

	row = vflist_index_by_path(vfl, source);
	if (row < 0) return FALSE;

	source_base = remove_level_from_path(source);
	dest_base = remove_level_from_path(dest);

	work = g_list_nth(vfl->list, row);
	fd = work->data;

	if (strcmp(source_base, dest_base) == 0)
		{
		GtkListStore *store;
		GtkTreeIter iter;
		GtkTreeIter position;
		gint old_row;
		gint n;

		old_row = g_list_index(vfl->list, fd);

		vfl->list = g_list_remove(vfl->list, fd);
		g_free(fd->path);

		fd->path = g_strdup(dest);
		fd->name = filename_from_path(fd->path);

		vfl->list = filelist_insert_sort(vfl->list, fd, vfl->sort_method, vfl->sort_ascend);
		n = g_list_index(vfl->list, fd);

		store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(vfl->listview)));
		row = vflist_find_row(vfl, fd, &iter);
		if (vflist_find_row(vfl, fd, &iter) >= 0 &&
		    gtk_tree_model_iter_nth_child(GTK_TREE_MODEL(store), &position, NULL, n))
			{
			if (old_row >= n)
				{
				gtk_list_store_move_before(store, &iter, &position);
				}
			else
				{
				gtk_list_store_move_after(store, &iter, &position);
				}
			}
		gtk_list_store_set(store, &iter, FILE_COLUMN_NAME, fd->name, -1);

		ret = TRUE;
		}
	else
		{
		ret = vflist_maint_removed(vfl, source, NULL);
		}

	g_free(source_base);
	g_free(dest_base);

	return ret;
}

gint vflist_maint_removed(ViewFileList *vfl, const gchar *path, GList *ignore_list)
{
	GtkTreeIter iter;
	GList *list;
	FileData *fd;
	gint row;
	gint new_row = -1;

	row = vflist_index_by_path(vfl, path);
	if (row < 0) return FALSE;

	if (vflist_index_is_selected(vfl, row) &&
	    layout_image_get_collection(vfl->layout, NULL) == NULL)
		{
		gint n;

		n = vflist_count(vfl, NULL);
		if (ignore_list)
			{
			new_row = vflist_maint_find_closest(vfl, row, n, ignore_list);
			if (debug) printf("row = %d, closest is %d\n", row, new_row);
			}
		else
			{
			if (row + 1 < n)
				{
				new_row = row + 1;
				}
			else if (row > 0)
				{
				new_row = row - 1;
				}
			}
		vflist_select_none(vfl);
		if (new_row >= 0)
			{
			fd = vflist_index_get_data(vfl, new_row);
			if (vflist_find_row(vfl, fd, &iter) >= 0)
				{
				GtkTreeSelection *selection;

				selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(vfl->listview));
				gtk_tree_selection_select_iter(selection, &iter);
				vflist_move_cursor(vfl, &iter);
				}
			}
		}

	fd = vflist_index_get_data(vfl, row);
	if (vflist_find_row(vfl, fd, &iter) >= 0)
		{
		GtkListStore *store;
		store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(vfl->listview)));
		gtk_list_store_remove(store, &iter);
		}
	list = g_list_nth(vfl->list, row);
	fd = list->data;

	/* thumbnail loader check */
	if (fd == vfl->thumbs_filedata) vfl->thumbs_filedata = NULL;

	vfl->list = g_list_remove(vfl->list, fd);
	file_data_free(fd);

	vflist_send_update(vfl);

	return TRUE;
}

gint vflist_maint_moved(ViewFileList *vfl, const gchar *source, const gchar *dest, GList *ignore_list)
{
	gint ret = FALSE;
	gchar *buf;

	if (!source || !vfl->path) return FALSE;

	buf = remove_level_from_path(source);

	if (strcmp(buf, vfl->path) == 0)
		{
		ret = vflist_maint_removed(vfl, source, ignore_list);
		}

	g_free(buf);

	return ret;
}