pan-view.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) 2005 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 "pan-view.h"

#include "cache.h"
#include "cache-loader.h"
#include "dnd.h"
#include "editors.h"
#include "filelist.h"
#include "fullscreen.h"
#include "image.h"
#include "image-load.h"
#include "img-view.h"
#include "info.h"
#include "menu.h"
#include "pixbuf-renderer.h"
#include "pixbuf_util.h"
#include "thumb.h"
#include "utilops.h"
#include "ui_bookmark.h"
#include "ui_fileops.h"
#include "ui_menu.h"
#include "ui_misc.h"
#include "ui_tabcomp.h"

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


#define PAN_WINDOW_DEFAULT_WIDTH 720
#define PAN_WINDOW_DEFAULT_HEIGHT 500

#define PAN_TILE_SIZE 512

#define PAN_THUMB_SIZE_DOTS 4
#define PAN_THUMB_SIZE_NONE 24
#define PAN_THUMB_SIZE_SMALL 64
#define PAN_THUMB_SIZE_NORMAL 128
#define PAN_THUMB_SIZE_LARGE 256
#define PAN_THUMB_SIZE pw->thumb_size

#define PAN_THUMB_GAP_DOTS 2
#define PAN_THUMB_GAP_SMALL 14
#define PAN_THUMB_GAP_NORMAL 30
#define PAN_THUMB_GAP_LARGE 40
#define PAN_THUMB_GAP_HUGE 50
#define PAN_THUMB_GAP pw->thumb_gap

#define PAN_SHADOW_OFFSET 6
#define PAN_SHADOW_FADE 5
#define PAN_SHADOW_COLOR 0, 0, 0
#define PAN_SHADOW_ALPHA 64

#define PAN_OUTLINE_THICKNESS 1
#define PAN_OUTLINE_COLOR_1 255, 255, 255
#define PAN_OUTLINE_COLOR_2 64, 64, 64
#define PAN_OUTLINE_ALPHA 180

#define PAN_BACKGROUND_COLOR 150, 150, 150

#define PAN_GRID_SIZE 60
#define PAN_GRID_COLOR 0, 0, 0
#define PAN_GRID_ALPHA 20

#define PAN_FOLDER_BOX_COLOR 255, 255, 255
#define PAN_FOLDER_BOX_ALPHA 100
#define PAN_FOLDER_BOX_BORDER 20

#define PAN_FOLDER_BOX_OUTLINE_THICKNESS 4
#define PAN_FOLDER_BOX_OUTLINE_COLOR 0, 0, 0
#define PAN_FOLDER_BOX_OUTLINE_ALPHA 128

#define PAN_TEXT_BORDER_SIZE 4
#define PAN_TEXT_COLOR 0, 0, 0

#define PAN_POPUP_COLOR 255, 255, 225
#define PAN_POPUP_ALPHA 255
#define PAN_POPUP_BORDER 1
#define PAN_POPUP_BORDER_COLOR 0, 0, 0
#define PAN_POPUP_TEXT_COLOR 0, 0, 0

#define PAN_CAL_POPUP_COLOR 220, 220, 220
#define PAN_CAL_POPUP_ALPHA 255
#define PAN_CAL_POPUP_BORDER 1
#define PAN_CAL_POPUP_BORDER_COLOR 0, 0, 0
#define PAN_CAL_POPUP_TEXT_COLOR 0, 0, 0

#define PAN_CAL_DAY_WIDTH 100
#define PAN_CAL_DAY_HEIGHT 80

#define PAN_CAL_DAY_COLOR 255, 255, 255
#define PAN_CAL_DAY_ALPHA 220
#define PAN_CAL_DAY_BORDER 2
#define PAN_CAL_DAY_BORDER_COLOR 0, 0, 0
#define PAN_CAL_DAY_TEXT_COLOR 0, 0, 0

#define PAN_CAL_MONTH_COLOR 255, 255, 255
#define PAN_CAL_MONTH_ALPHA 200
#define PAN_CAL_MONTH_BORDER 4
#define PAN_CAL_MONTH_BORDER_COLOR 0, 0, 0
#define PAN_CAL_MONTH_TEXT_COLOR 0, 0, 0

#define PAN_CAL_DOT_SIZE 3
#define PAN_CAL_DOT_GAP 2
#define PAN_CAL_DOT_COLOR 128, 128, 128
#define PAN_CAL_DOT_ALPHA 128


#define PAN_GROUP_MAX 16

#define ZOOM_INCREMENT 1.0
#define ZOOM_LABEL_WIDTH 64


#define PAN_PREF_GROUP "pan_view_options"
#define PAN_PREF_HIDE_WARNING "hide_performance_warning"
#define PAN_PREF_EXIF_DATE "use_exif_date"


typedef enum {
	LAYOUT_TIMELINE = 0,
	LAYOUT_CALENDAR,
	LAYOUT_FOLDERS_LINEAR,
	LAYOUT_FOLDERS_FLOWER,
	LAYOUT_GRID,
} LayoutType;

typedef enum {
	LAYOUT_SIZE_THUMB_DOTS = 0,
	LAYOUT_SIZE_THUMB_NONE,
	LAYOUT_SIZE_THUMB_SMALL,
	LAYOUT_SIZE_THUMB_NORMAL,
	LAYOUT_SIZE_THUMB_LARGE,
	LAYOUT_SIZE_10,
	LAYOUT_SIZE_25,
	LAYOUT_SIZE_33,
	LAYOUT_SIZE_50,
	LAYOUT_SIZE_100
} LayoutSize;

typedef enum {
	ITEM_NONE,
	ITEM_THUMB,
	ITEM_BOX,
	ITEM_TRIANGLE,
	ITEM_TEXT,
	ITEM_IMAGE
} ItemType;

typedef enum {
	TEXT_ATTR_NONE = 0,
	TEXT_ATTR_BOLD = 1 << 0,
	TEXT_ATTR_HEADING = 1 << 1,
	TEXT_ATTR_MARKUP = 1 << 2
} TextAttrType;

enum {
	BORDER_NONE = 0,
	BORDER_1 = 1 << 0,
	BORDER_2 = 1 << 1,
	BORDER_3 = 1 << 2,
	BORDER_4 = 1 << 3
};

typedef struct _PanItem PanItem;
struct _PanItem {
	ItemType type;
	gint x;
	gint y;
	gint width;
	gint height;
	gchar *key;

	FileData *fd;

	GdkPixbuf *pixbuf;
	gint refcount;

	gchar *text;
	TextAttrType text_attr;

	guint8 color_r;
	guint8 color_g;
	guint8 color_b;
	guint8 color_a;

	guint8 color2_r;
	guint8 color2_g;
	guint8 color2_b;
	guint8 color2_a;
	gint border;

	gpointer data;

	gint queued;
};

typedef struct _PanWindow PanWindow;
struct _PanWindow
{
	GtkWidget *window;
	ImageWindow *imd;
	ImageWindow *imd_normal;
	FullScreenData *fs;

	GtkWidget *path_entry;

	GtkWidget *label_message;
	GtkWidget *label_zoom;

	GtkWidget *search_box;
	GtkWidget *search_entry;
	GtkWidget *search_label;
	GtkWidget *search_button;
	GtkWidget *search_button_arrow;

	GtkWidget *date_button;

	GtkWidget *scrollbar_h;
	GtkWidget *scrollbar_v;

	gint overlay_id;

	gchar *path;
	LayoutType layout;
	LayoutSize size;
	gint thumb_size;
	gint thumb_gap;
	gint image_size;
	gint exif_date_enable;

	gint ignore_symlinks;

	GList *list;
	GList *list_static;
	GList *list_grid;

	GList *cache_list;
	GList *cache_todo;
	gint cache_count;
	gint cache_total;
	gint cache_tick;
	CacheLoader *cache_cl;

	ImageLoader *il;
	ThumbLoader *tl;
	PanItem *queue_pi;
	GList *queue;

	PanItem *click_pi;
	PanItem *search_pi;

	gint idle_id;
};

typedef struct _PanGrid PanGrid;
struct _PanGrid {
	gint x;
	gint y;
	gint w;
	gint h;
	GList *list;
};

typedef struct _PanCacheData PanCacheData;
struct _PanCacheData {
	FileData fd;
	CacheData *cd;
};


static GList *pan_window_list = NULL;


static GList *pan_window_layout_list(const gchar *path, SortType sort, gint ascend,
				     gint ignore_symlinks);

static GList *pan_layout_intersect(PanWindow *pw, gint x, gint y, gint width, gint height);

static void pan_window_layout_update_idle(PanWindow *pw);

static GtkWidget *pan_popup_menu(PanWindow *pw);
static void pan_fullscreen_toggle(PanWindow *pw, gint force_off);

static void pan_window_close(PanWindow *pw);

static void pan_window_dnd_init(PanWindow *pw);


typedef enum {
	DATE_LENGTH_EXACT,
	DATE_LENGTH_HOUR,
	DATE_LENGTH_DAY,
	DATE_LENGTH_WEEK,
	DATE_LENGTH_MONTH,
	DATE_LENGTH_YEAR
} DateLengthType;

static gint date_compare(time_t a, time_t b, DateLengthType length)
{
	struct tm ta;
	struct tm tb;

	if (length == DATE_LENGTH_EXACT) return (a == b);

	if (!localtime_r(&a, &ta) ||
	    !localtime_r(&b, &tb)) return FALSE;

	if (ta.tm_year != tb.tm_year) return FALSE;
	if (length == DATE_LENGTH_YEAR) return TRUE;

	if (ta.tm_mon != tb.tm_mon) return FALSE;
	if (length == DATE_LENGTH_MONTH) return TRUE;

	if (length == DATE_LENGTH_WEEK) return (ta.tm_yday / 7 == tb.tm_yday / 7);

	if (ta.tm_mday != tb.tm_mday) return FALSE;
	if (length == DATE_LENGTH_DAY) return TRUE;

	return (ta.tm_hour == tb.tm_hour);
}

static gint date_value(time_t d, DateLengthType length)
{
	struct tm td;

	if (!localtime_r(&d, &td)) return -1;

	switch (length)
		{
		case DATE_LENGTH_DAY:
			return td.tm_mday;
			break;
		case DATE_LENGTH_WEEK:
			return td.tm_wday;
			break;
		case DATE_LENGTH_MONTH:
			return td.tm_mon + 1;
			break;
		case DATE_LENGTH_YEAR:
			return td.tm_year + 1900;
			break;
		case DATE_LENGTH_EXACT:
		default:
			break;
		}

	return -1;
}

static gchar *date_value_string(time_t d, DateLengthType length)
{
	struct tm td;
	gchar buf[128];
	gchar *format = NULL;

	if (!localtime_r(&d, &td)) return g_strdup("");

	switch (length)
		{
		case DATE_LENGTH_DAY:
			return g_strdup_printf("%d", td.tm_mday);
			break;
		case DATE_LENGTH_WEEK:
			format = "%A %e";
			break;
		case DATE_LENGTH_MONTH:
			format = "%B %Y";
			break;
		case DATE_LENGTH_YEAR:
			return g_strdup_printf("%d", td.tm_year + 1900);
			break;
		case DATE_LENGTH_EXACT:
		default:
			return g_strdup(text_from_time(d));
			break;
		}


	if (format && strftime(buf, sizeof(buf), format, &td) > 0)
		{
		gchar *ret = g_locale_to_utf8(buf, -1, NULL, NULL, NULL);
		if (ret) return ret;
		}

	return g_strdup("");
}

static time_t date_to_time(gint year, gint month, gint day)
{
	struct tm lt;

	lt.tm_sec = 0;
	lt.tm_min = 0;
	lt.tm_hour = 0;
	lt.tm_mday = (day >= 1 && day <= 31) ? day : 1;
	lt.tm_mon = (month >= 1 && month <= 12) ? month - 1 : 0;
	lt.tm_year = year - 1900;
	lt.tm_isdst = 0;

	return mktime(&lt);
}

/*
 *-----------------------------------------------------------------------------
 * cache
 *-----------------------------------------------------------------------------
 */

static void pan_cache_free(PanWindow *pw)
{
	GList *work;

	work = pw->cache_list;
	while (work)
		{
		PanCacheData *pc;

		pc = work->data;
		work = work->next;

		cache_sim_data_free(pc->cd);
		file_data_free((FileData *)pc);
		}

	g_list_free(pw->cache_list);
	pw->cache_list = NULL;

	filelist_free(pw->cache_todo);
	pw->cache_todo = NULL;

	pw->cache_count = 0;
	pw->cache_total = 0;
	pw->cache_tick = 0;

	cache_loader_free(pw->cache_cl);
	pw->cache_cl = NULL;
}

static void pan_cache_fill(PanWindow *pw, const gchar *path)
{
	GList *list;

	pan_cache_free(pw);

	list = pan_window_layout_list(path, SORT_NAME, TRUE, pw->ignore_symlinks);
	pw->cache_todo = g_list_reverse(list);

	pw->cache_total = g_list_length(pw->cache_todo);
}

static void pan_cache_step_done_cb(CacheLoader *cl, gint error, gpointer data)
{
	PanWindow *pw = data;

	if (pw->cache_list)
		{
		PanCacheData *pc;
		pc = pw->cache_list->data;

		if (!pc->cd)
			{
			pc->cd = cl->cd;
			cl->cd = NULL;
			}
		}

	cache_loader_free(cl);
	pw->cache_cl = NULL;

	pan_window_layout_update_idle(pw);
}

static gint pan_cache_step(PanWindow *pw)
{
	FileData *fd;
	PanCacheData *pc;
	CacheDataType load_mask;

	if (!pw->cache_todo) return TRUE;

	fd = pw->cache_todo->data;
	pw->cache_todo = g_list_remove(pw->cache_todo, fd);

#if 0
	if (enable_thumb_caching)
		{
		gchar *found;

		found = cache_find_location(CACHE_TYPE_SIM, fd->path);
		if (found && filetime(found) == fd->date)
			{
			cd = cache_sim_data_load(found);
			}
		g_free(found);
		}

	if (!cd) cd = cache_sim_data_new();

	if (!cd->dimensions)
		{
		cd->dimensions = image_load_dimensions(fd->path, &cd->width, &cd->height);
		if (enable_thumb_caching &&
		    cd->dimensions)
			{
			gchar *base;
			mode_t mode = 0755;

			base = cache_get_location(CACHE_TYPE_SIM, fd->path, FALSE, &mode);
			if (cache_ensure_dir_exists(base, mode))
				{
				g_free(cd->path);
				cd->path = cache_get_location(CACHE_TYPE_SIM, fd->path, TRUE, NULL);
				if (cache_sim_data_save(cd))
					{
					filetime_set(cd->path, filetime(fd->path));
					}
				}
			g_free(base);
			}

		pw->cache_tick = 9;
		}
#endif
	pc = g_new0(PanCacheData, 1);
	memcpy(pc, fd, sizeof(FileData));
	g_free(fd);

	pc->cd = NULL;

	pw->cache_list = g_list_prepend(pw->cache_list, pc);

	cache_loader_free(pw->cache_cl);

	load_mask = CACHE_LOADER_NONE;
	if (pw->size > LAYOUT_SIZE_THUMB_LARGE) load_mask |= CACHE_LOADER_DIMENSIONS;
	if (pw->exif_date_enable) load_mask |= CACHE_LOADER_DATE;
	pw->cache_cl = cache_loader_new(((FileData *)pc)->path, load_mask,
					pan_cache_step_done_cb, pw);
	return (pw->cache_cl == NULL);
}

/* This sync date function is optimized for lists with a common sort */
static void pan_cache_sync_date(PanWindow *pw, GList *list)
{
	GList *haystack;
	GList *work;

	haystack = g_list_copy(pw->cache_list);

	work = list;
	while (work)
		{
		FileData *fd;
		GList *needle;

		fd = work->data;
		work = work->next;

		needle = haystack;
		while (needle)
			{
			PanCacheData *pc;
			gchar *path;

			pc = needle->data;
			path = ((FileData *)pc)->path;
			if (path && strcmp(path, fd->path) == 0)
				{
				if (pc->cd && pc->cd->have_date && pc->cd->date >= 0)
					{
					fd->date = pc->cd->date;
					}

				haystack = g_list_delete_link(haystack, needle);
				needle = NULL;
				}
			else
				{
				needle = needle->next;
				}
			}
		}

	g_list_free(haystack);
}

/*
 *-----------------------------------------------------------------------------
 * item grid
 *-----------------------------------------------------------------------------
 */