view_file_icon.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

/*
 * GQview
 * (C) 2004 John Ellis
 *
 * Author: John Ellis
 *
 * This software is released under the GNU General Public License (GNU GPL).
 * Please read the included file COPYING for more information.
 * This software comes with no warranty of any kind, use at your own risk!
 */

#include "gqview.h"
#include "view_file_icon.h"

#include "cellrenderericon.h"
#include "collect.h"
#include "collect-io.h"
#include "collect-table.h"
#include "dnd.h"
#include "editors.h"
#include "img-view.h"
#include "info.h"
#include "filelist.h"
#include "layout.h"
#include "layout_image.h"
#include "menu.h"
#include "thumb.h"
#include "utilops.h"
#include "ui_bookmark.h"
#include "ui_fileops.h"
#include "ui_menu.h"
#include "ui_tree_edit.h"


#include <gdk/gdkkeysyms.h> /* for keyboard values */

/* between these, the icon width is increased by thumb_max_width / 2 */
#define THUMB_MIN_ICON_WIDTH 128
#define THUMB_MAX_ICON_WIDTH 150

#define VFICON_MAX_COLUMNS 32
#define THUMB_BORDER_PADDING 2

#define VFICON_TIP_DELAY 500

#define ICON_DATA(x) ((IconData *)x)
#define FILE_DATA(x) ((FileData *)x)


enum {
	FILE_COLUMN_POINTER = 0,
	FILE_COLUMN_COUNT
};

typedef enum {
	SELECTION_NONE		= 0,
	SELECTION_SELECTED	= 1 << 0,
	SELECTION_PRELIGHT	= 1 << 1,
	SELECTION_FOCUS		= 1 << 2
} SelectionType;

typedef struct _IconData IconData;
struct _IconData
{
	FileData fd;
	SelectionType selected;
};


static gint iconlist_read(const gchar *path, GList **list)
{
	GList *temp;
	GList *work;

	if (!filelist_read(path, &temp, NULL)) return FALSE;

	work = temp;
	while (work)
		{
		FileData *fd;
		IconData *id;

		fd = work->data;
		id = g_new0(IconData, 1);

		memcpy(id, fd, sizeof(FileData));
		id->selected = SELECTION_NONE;

		work->data = id;
		g_free(fd);

		work = work->next;
		}

	*list = temp;

	return TRUE;
}

static void iconlist_free(GList *list)
{
	filelist_free(list);
}


static void vficon_toggle_filenames(ViewFileIcon *vfi);
static void vficon_selection_remove(ViewFileIcon *vfi, FileData *fd, SelectionType mask, GtkTreeIter *iter);
static void vficon_move_focus(ViewFileIcon *vfi, gint row, gint col, gint relative);
static void vficon_set_focus(ViewFileIcon *vfi, FileData *fd);
static void vficon_thumb_update(ViewFileIcon *vfi);
static void vficon_populate_at_new_size(ViewFileIcon *vfi, gint w, gint h, gint force);


/*
 *-----------------------------------------------------------------------------
 * pop-up menu
 *-----------------------------------------------------------------------------
 */

static GList *vficon_pop_menu_file_list(ViewFileIcon *vfi)
{
	if (!vfi->click_fd) return NULL;

	if (ICON_DATA(vfi->click_fd)->selected & SELECTION_SELECTED)
		{
		return vficon_selection_get_list(vfi);
		}

	return g_list_append(NULL, g_strdup(vfi->click_fd->path));
}

static void vficon_pop_menu_edit_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi;
	gint n;
	GList *list;

	vfi = submenu_item_get_data(widget);
	n = GPOINTER_TO_INT(data);

	if (!vfi) return;

	list = vficon_pop_menu_file_list(vfi);
	start_editor_from_path_list(n, list);
	path_list_free(list);
}

static void vficon_pop_menu_info_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	info_window_new(NULL, vficon_pop_menu_file_list(vfi));
}

static void vficon_pop_menu_view_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	if (!vfi->click_fd) return;

	if (ICON_DATA(vfi->click_fd)->selected & SELECTION_SELECTED)
		{
		GList *list;
		
		list = vficon_selection_get_list(vfi);
		view_window_new_from_list(list);
		path_list_free(list);
		}
	else
		{
		view_window_new(vfi->click_fd->path);
		}
}

static void vficon_pop_menu_copy_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	file_util_copy(NULL, vficon_pop_menu_file_list(vfi), NULL, vfi->listview);
}

static void vficon_pop_menu_move_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	file_util_move(NULL, vficon_pop_menu_file_list(vfi), NULL, vfi->listview);
}

static void vficon_pop_menu_rename_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	file_util_rename(NULL, vficon_pop_menu_file_list(vfi), vfi->listview);
}

static void vficon_pop_menu_delete_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	file_util_delete(NULL, vficon_pop_menu_file_list(vfi), vfi->listview);
}

static void vficon_pop_menu_sort_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi;
	SortType type;
	
	vfi = submenu_item_get_data(widget);
	if (!vfi) return;

	type = (SortType)GPOINTER_TO_INT(data);

	if (vfi->layout)
		{
		layout_sort_set(vfi->layout, type, vfi->sort_ascend);
		}
	else
		{
		vficon_sort_set(vfi, type, vfi->sort_ascend);
		}
}

static void vficon_pop_menu_sort_ascend_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	if (vfi->layout)
		{
		layout_sort_set(vfi->layout, vfi->sort_method, !vfi->sort_ascend);
		}
	else
		{
		vficon_sort_set(vfi, vfi->sort_method, !vfi->sort_ascend);
		}
}

static void vficon_pop_menu_list_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	if (vfi->layout) layout_views_set(vfi->layout, vfi->layout->tree_view, FALSE);
}

static void vficon_pop_menu_show_names_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	vficon_toggle_filenames(vfi);
}

static void vficon_pop_menu_refresh_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;

	vficon_refresh(vfi);
}

static void vficon_popup_destroy_cb(GtkWidget *widget, gpointer data)
{
	ViewFileIcon *vfi = data;                                                                                                                               
	vficon_selection_remove(vfi, vfi->click_fd, SELECTION_PRELIGHT, NULL);
	vfi->click_fd = NULL;
	vfi->popup = NULL;
}

static GtkWidget *vficon_pop_menu(ViewFileIcon *vfi, gint active)
{
	GtkWidget *menu;
	GtkWidget *item;
	GtkWidget *submenu;

	menu = popup_menu_short_lived();

	g_signal_connect(G_OBJECT(menu), "destroy",
			 G_CALLBACK(vficon_popup_destroy_cb), vfi);

	submenu_add_edit(menu, &item, G_CALLBACK(vficon_pop_menu_edit_cb), vfi);
	gtk_widget_set_sensitive(item, active);

	item = menu_item_add_stock(menu, _("_Properties"), GTK_STOCK_PROPERTIES, G_CALLBACK(vficon_pop_menu_info_cb), vfi);
	gtk_widget_set_sensitive(item, active);

	item = menu_item_add_stock(menu, _("View in _new window"), GTK_STOCK_NEW, G_CALLBACK(vficon_pop_menu_view_cb), vfi);
	gtk_widget_set_sensitive(item, active);

	menu_item_add_divider(menu);
	item = menu_item_add_stock(menu, _("_Copy..."), GTK_STOCK_COPY, G_CALLBACK(vficon_pop_menu_copy_cb), vfi);
	gtk_widget_set_sensitive(item, active);
	item = menu_item_add(menu, _("_Move..."), G_CALLBACK(vficon_pop_menu_move_cb), vfi);
	gtk_widget_set_sensitive(item, active);
	item = menu_item_add(menu, _("_Rename..."), G_CALLBACK(vficon_pop_menu_rename_cb), vfi);
	gtk_widget_set_sensitive(item, active);
	item = menu_item_add_stock(menu, _("_Delete..."), GTK_STOCK_DELETE, G_CALLBACK(vficon_pop_menu_delete_cb), vfi);
	gtk_widget_set_sensitive(item, active);

	menu_item_add_divider(menu);

	submenu = submenu_add_sort(NULL, G_CALLBACK(vficon_pop_menu_sort_cb), vfi,
				   FALSE, FALSE, TRUE, vfi->sort_method);
	menu_item_add_divider(submenu);
	menu_item_add_check(submenu, _("Ascending"), vfi->sort_ascend,
			    G_CALLBACK(vficon_pop_menu_sort_ascend_cb), vfi);

	item = menu_item_add(menu, _("_Sort"), NULL, NULL);
	gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), submenu);

	menu_item_add_check(menu, _("View as _icons"), TRUE,
			    G_CALLBACK(vficon_pop_menu_list_cb), vfi);
	menu_item_add_check(menu, _("Show filename _text"), vfi->show_text,
			    G_CALLBACK(vficon_pop_menu_show_names_cb), vfi);
	menu_item_add_stock(menu, _("Re_fresh"), GTK_STOCK_REFRESH, G_CALLBACK(vficon_pop_menu_refresh_cb), vfi);

	return menu;
}

/*
 *-------------------------------------------------------------------
 * signals
 *-------------------------------------------------------------------
 */

static void vficon_send_update(ViewFileIcon *vfi)
{
	if (vfi->func_status) vfi->func_status(vfi, vfi->data_status);
}

static void vficon_send_layout_select(ViewFileIcon *vfi, FileData *fd)
{
	const gchar *read_ahead_path = NULL;

	if (!vfi->layout || !fd) return;

	if (enable_read_ahead)
		{
		FileData *fd_n;
		gint row;

		row = g_list_index(vfi->list, fd);
		if (row > vficon_index_by_path(vfi, layout_image_get_path(vfi->layout)) &&
		    row + 1 < vficon_count(vfi, NULL))
			{
			fd_n = vficon_index_get_data(vfi, row + 1);
			}
		else if (row > 0)
			{
			fd_n = vficon_index_get_data(vfi, row - 1);
			}
		else
			{
			fd_n = NULL;
			}
		if (fd_n) read_ahead_path = fd_n->path;
		}

	layout_image_set_with_ahead(vfi->layout, fd->path, read_ahead_path);
}

static void vficon_toggle_filenames(ViewFileIcon *vfi)
{
	vfi->show_text = !vfi->show_text;
	show_icon_names = vfi->show_text;

	vficon_populate_at_new_size(vfi, vfi->listview->allocation.width, vfi->listview->allocation.height, TRUE);
}

static gint vficon_get_icon_width(ViewFileIcon *vfi)
{
	gint width;

	if (!vfi->show_text) return thumb_max_width;

	width = thumb_max_width + thumb_max_width / 2;
	if (width < THUMB_MIN_ICON_WIDTH) width = THUMB_MIN_ICON_WIDTH;
	if (width > THUMB_MAX_ICON_WIDTH) width = thumb_max_width;

	return width;
}

/*
 *-------------------------------------------------------------------
 * misc utils
 *-------------------------------------------------------------------
 */

static gint vficon_find_position(ViewFileIcon *vfi, FileData *fd, gint *row, gint *col)
{
	gint n;

	n = g_list_index(vfi->list, fd);

	if (n < 0) return FALSE;

	*row = n / vfi->columns;
	*col = n - (*row * vfi->columns);

	return TRUE;
}

static gint vficon_find_iter(ViewFileIcon *vfi, FileData *fd, GtkTreeIter *iter, gint *column)
{
	GtkTreeModel *store;
	gint row, col;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
	if (!vficon_find_position(vfi, fd, &row, &col)) return FALSE;
	if (!gtk_tree_model_iter_nth_child(store, iter, NULL, row)) return FALSE;
	if (column) *column = col;

	return TRUE;
}

static FileData *vficon_find_data(ViewFileIcon *vfi, gint row, gint col, GtkTreeIter *iter)
{
	GtkTreeModel *store;
	GtkTreeIter p;

	if (row < 0 || col < 0) return NULL;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
	if (gtk_tree_model_iter_nth_child(store, &p, NULL, row))
		{
		GList *list;

		gtk_tree_model_get(store, &p, FILE_COLUMN_POINTER, &list, -1);
		if (!list) return NULL;

		if (iter) *iter = p;

		return g_list_nth_data(list, col);
		}

	return NULL;
}

static FileData *vficon_find_data_by_coord(ViewFileIcon *vfi, gint x, gint y, GtkTreeIter *iter)
{
	GtkTreePath *tpath;
	GtkTreeViewColumn *column;

	if (gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(vfi->listview), x, y,
					  &tpath, &column, NULL, NULL))
		{
		GtkTreeModel *store;
		GtkTreeIter row;
		GList *list;
		gint n;

		store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
		gtk_tree_model_get_iter(store, &row, tpath);
		gtk_tree_path_free(tpath);

		gtk_tree_model_get(store, &row, FILE_COLUMN_POINTER, &list, -1);

		n = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(column), "column_number"));
		if (list)
			{
			if (iter) *iter = row;
			return g_list_nth_data(list, n);
			}
		}

	return NULL;
}

/*
 *-------------------------------------------------------------------
 * tooltip type window
 *-------------------------------------------------------------------
 */

static void tip_show(ViewFileIcon *vfi)
{
	GtkWidget *label;
	gint x, y;

	if (vfi->tip_window) return;

	gdk_window_get_pointer(gtk_tree_view_get_bin_window(GTK_TREE_VIEW(vfi->listview)), &x, &y, NULL);

	vfi->tip_fd = vficon_find_data_by_coord(vfi, x, y, NULL);
	if (!vfi->tip_fd) return;

	vfi->tip_window = gtk_window_new(GTK_WINDOW_POPUP);
	gtk_window_set_resizable(GTK_WINDOW(vfi->tip_window), FALSE);
	gtk_container_set_border_width(GTK_CONTAINER(vfi->tip_window), 2);

	label = gtk_label_new(vfi->tip_fd->name);

	g_object_set_data(G_OBJECT(vfi->tip_window), "tip_label", label);
	gtk_container_add(GTK_CONTAINER(vfi->tip_window), label);
	gtk_widget_show(label);

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

	if (!GTK_WIDGET_REALIZED(vfi->tip_window)) gtk_widget_realize(vfi->tip_window);
	gtk_window_move(GTK_WINDOW(vfi->tip_window), x + 16, y + 16);
	gtk_widget_show(vfi->tip_window);
}

static void tip_hide(ViewFileIcon *vfi)
{
	if (vfi->tip_window) gtk_widget_destroy(vfi->tip_window);
	vfi->tip_window = NULL;
}

static gint tip_schedule_cb(gpointer data)
{
	ViewFileIcon *vfi = data;
	GtkWidget *window;

	if (vfi->tip_delay_id == -1) return FALSE;

	window = gtk_widget_get_toplevel(vfi->listview);

	if (GTK_WIDGET_SENSITIVE(window) &&
	    GTK_WINDOW(window)->has_focus)
		{
		tip_show(vfi);
		}

	vfi->tip_delay_id = -1;
	return FALSE;
}

static void tip_schedule(ViewFileIcon *vfi)
{
	tip_hide(vfi);

	if (vfi->tip_delay_id != -1)
		{
		g_source_remove(vfi->tip_delay_id);
		vfi->tip_delay_id = -1;
		}

	if (!vfi->show_text)
		{
		vfi->tip_delay_id = g_timeout_add(VFICON_TIP_DELAY, tip_schedule_cb, vfi);
		}
}

static void tip_unschedule(ViewFileIcon *vfi)
{
	tip_hide(vfi);

	if (vfi->tip_delay_id != -1) g_source_remove(vfi->tip_delay_id);
	vfi->tip_delay_id = -1;
}

static void tip_update(ViewFileIcon *vfi, FileData *fd)
{
	if (vfi->tip_window)
		{
		gint x, y;

		gdk_window_get_pointer(NULL, &x, &y, NULL);
		gtk_window_move(GTK_WINDOW(vfi->tip_window), x + 16, y + 16);

		if (fd != vfi->tip_fd)
			{
			GtkWidget *label;

			vfi->tip_fd = fd;

			if (!vfi->tip_fd)
				{
				tip_hide(vfi);
				tip_schedule(vfi);
				return;
				}

			label = g_object_get_data(G_OBJECT(vfi->tip_window), "tip_label");
			gtk_label_set_text(GTK_LABEL(label), vfi->tip_fd->name);
			}
		}
	else
		{
		tip_schedule(vfi);
		}
}

/*
 *-------------------------------------------------------------------
 * dnd
 *-------------------------------------------------------------------
 */

static void vficon_dnd_get(GtkWidget *widget, GdkDragContext *context,
			   GtkSelectionData *selection_data, guint info,
			   guint time, gpointer data)
{
	ViewFileIcon *vfi = data;
	GList *list = NULL;
	gchar *uri_text = NULL;
	gint total;

	if (!vfi->click_fd) return;

	if (ICON_DATA(vfi->click_fd)->selected & SELECTION_SELECTED)
		{
		list = vficon_selection_get_list(vfi);
		}
	else
		{
		const gchar *path = vfi->click_fd->path;

		list = g_list_append(NULL, g_strdup(path));
		}

	if (!list) return;
	uri_text = uri_text_from_list(list, &total, (info == TARGET_TEXT_PLAIN));
	path_list_free(list);

	if (debug) printf(uri_text);

	gtk_selection_data_set(selection_data, selection_data->target,
			       8, uri_text, total);
	g_free(uri_text);
}

static void vficon_dnd_begin(GtkWidget *widget, GdkDragContext *context, gpointer data)
{
	ViewFileIcon *vfi = data;

	tip_unschedule(vfi);

	if (vfi->click_fd && vfi->click_fd->pixbuf)
		{
		gint items;

		if (ICON_DATA(vfi->click_fd)->selected & SELECTION_SELECTED)
			items = g_list_length(vfi->selection);
		else
			items = 1;

		dnd_set_drag_icon(widget, context, vfi->click_fd->pixbuf, items);
		}
}

static void vficon_dnd_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
{