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。

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

	work = pw->list_grid;
	while (work)
		{
		PanGrid *pg;

		pg = work->data;
		work = work->next;

		g_list_free(pg->list);
		g_free(pg);
		}

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

	pw->list = g_list_concat(pw->list, pw->list_static);
	pw->list_static = NULL;
}

static void pan_grid_build(PanWindow *pw, gint width, gint height, gint grid_size)
{
	GList *work;
	gint col, row;
	gint cw, ch;
	gint l;
	gdouble total;
	gdouble s;
	gdouble aw, ah;
	gint i, j;

	pan_grid_clear(pw);

	l = g_list_length(pw->list);

	if (l < 1) return;

	total = (gdouble)width * (gdouble)height / (gdouble)l;
	s = sqrt(total);

	aw = (gdouble)width / s;
	ah = (gdouble)height / s;

	col = (gint)(sqrt((gdouble)l / grid_size) * width / height + 0.999);
	col = CLAMP(col, 1, l / grid_size + 1);
	row = (gint)((gdouble)l / grid_size / col);
	if (row < 1) row = 1;

	/* limit minimum size of grid so that a tile will always fit regardless of position */
	cw = MAX((gint)ceil((gdouble)width / col), PAN_TILE_SIZE * 2);
	ch = MAX((gint)ceil((gdouble)height / row), PAN_TILE_SIZE * 2);

	row = row * 2 - 1;
	col = col * 2 - 1;

	printf("intersect speedup grid is %dx%d, based on %d average per grid\n", col, row, grid_size);

	for (j = 0; j < row; j++)
	    for (i = 0; i < col; i++)
		{
		if ((i + 1) * cw / 2 < width && (j + 1) * ch / 2 < height)
			{
			PanGrid *pg;

			pg = g_new0(PanGrid, 1);
			pg->x = i * cw / 2;
			pg->y = j * ch / 2;
			pg->w = cw;
			pg->h = ch;
			pg->list = NULL;

			pw->list_grid = g_list_prepend(pw->list_grid, pg);

			if (debug) printf("grid section: %d,%d (%dx%d)\n", pg->x, pg->y, pg->w, pg->h);
			}
		}

	work = pw->list;
	while (work)
		{
		PanItem *pi;
		GList *grid;

		pi = work->data;
		work = work->next;

		grid = pw->list_grid;
		while (grid)
			{
			PanGrid *pg;
			gint rx, ry, rw, rh;

			pg = grid->data;
			grid = grid->next;

			if (util_clip_region(pi->x, pi->y, pi->width, pi->height,
					     pg->x, pg->y, pg->w, pg->h,
					     &rx, &ry, &rw, &rh))
				{
				pg->list = g_list_prepend(pg->list, pi);
				}
			}
		}

	work = pw->list_grid;
	while (work)
		{
		PanGrid *pg;

		pg = work->data;
		work = work->next;

		pg->list = g_list_reverse(pg->list);
		}

	pw->list_static = pw->list;
	pw->list = NULL;
}



/*
 *-----------------------------------------------------------------------------
 * item objects
 *-----------------------------------------------------------------------------
 */

static void pan_item_free(PanItem *pi)
{
	if (!pi) return;

	if (pi->pixbuf) g_object_unref(pi->pixbuf);
	if (pi->fd) file_data_free(pi->fd);
	g_free(pi->text);
	g_free(pi->key);
	g_free(pi->data);

	g_free(pi);
}

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

	pan_grid_clear(pw);

	work = pw->list;
	while (work)
		{
		PanItem *pi = work->data;
		work = work->next;

		pan_item_free(pi);
		}

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

	g_list_free(pw->queue);
	pw->queue = NULL;
	pw->queue_pi = NULL;

	image_loader_free(pw->il);
	pw->il = NULL;

	thumb_loader_free(pw->tl);
	pw->tl = NULL;

	pw->click_pi = NULL;
	pw->search_pi = NULL;
}

static PanItem *pan_item_new_thumb(PanWindow *pw, FileData *fd, gint x, gint y)
{
	PanItem *pi;

	pi = g_new0(PanItem, 1);
	pi->type = ITEM_THUMB;
	pi->fd = fd;
	pi->x = x;
	pi->y = y;
	pi->width = PAN_THUMB_SIZE + PAN_SHADOW_OFFSET * 2;
	pi->height = PAN_THUMB_SIZE + PAN_SHADOW_OFFSET * 2;

	pi->pixbuf = NULL;

	pi->queued = FALSE;

	pw->list = g_list_prepend(pw->list, pi);

	return pi;
}

static PanItem *pan_item_new_box(PanWindow *pw, FileData *fd, gint x, gint y, gint width, gint height,
				 gint border_size,
				 guint8 base_r, guint8 base_g, guint8 base_b, guint8 base_a,
				 guint8 bord_r, guint8 bord_g, guint8 bord_b, guint8 bord_a)
{
	PanItem *pi;

	pi = g_new0(PanItem, 1);
	pi->type = ITEM_BOX;
	pi->fd = fd;
	pi->x = x;
	pi->y = y;
	pi->width = width;
	pi->height = height;

	pi->color_r = base_r;
	pi->color_g = base_g;
	pi->color_b = base_b;
	pi->color_a = base_a;

	pi->color2_r = bord_r;
	pi->color2_g = bord_g;
	pi->color2_b = bord_b;
	pi->color2_a = bord_a;
	pi->border = border_size;

	pw->list = g_list_prepend(pw->list, pi);

	return pi;
}

static void pan_item_box_shadow(PanItem *pi, gint offset, gint fade)
{
	gint *shadow;

	if (!pi || pi->type != ITEM_BOX) return;

	shadow = pi->data;
	if (shadow)
		{
		pi->width -= shadow[0];
		pi->height -= shadow[0];
		}

	shadow = g_new0(gint, 2);
	shadow[0] = offset;
	shadow[1] = fade;

	pi->width += offset;
	pi->height += offset;

	g_free(pi->data);
	pi->data = shadow;
}

static PanItem *pan_item_new_tri(PanWindow *pw, FileData *fd, gint x, gint y, gint width, gint height,
				 gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
				 guint8 r, guint8 g, guint8 b, guint8 a)
{
	PanItem *pi;
	gint *coord;

	pi = g_new0(PanItem, 1);
	pi->type = ITEM_TRIANGLE;
	pi->x = x;
	pi->y = y;
	pi->width = width;
	pi->height = height;

	pi->color_r = r;
	pi->color_g = g;
	pi->color_b = b;
	pi->color_a = a;

	coord = g_new0(gint, 6);
	coord[0] = x1;
	coord[1] = y1;
	coord[2] = x2;
	coord[3] = y2;
	coord[4] = x3;
	coord[5] = y3;

	pi->data = coord;

	pi->border = BORDER_NONE;

	pw->list = g_list_prepend(pw->list, pi);

	return pi;
}

static void pan_item_tri_border(PanItem *pi, gint borders,
				guint8 r, guint8 g, guint8 b, guint8 a)
{
	if (!pi || pi->type != ITEM_TRIANGLE) return;

	pi->border = borders;

	pi->color2_r = r;
	pi->color2_g = g;
	pi->color2_b = b;
	pi->color2_a = a;
}

static PangoLayout *pan_item_text_layout(PanItem *pi, GtkWidget *widget)
{
	PangoLayout *layout;

	layout = gtk_widget_create_pango_layout(widget, NULL);

	if (pi->text_attr & TEXT_ATTR_MARKUP)
		{
		pango_layout_set_markup(layout, pi->text, -1);
		return layout;
		}

	if (pi->text_attr & TEXT_ATTR_BOLD ||
	    pi->text_attr & TEXT_ATTR_HEADING)
		{
		PangoAttrList *pal;
		PangoAttribute *pa;
		
		pal = pango_attr_list_new();
		if (pi->text_attr & TEXT_ATTR_BOLD)
			{
			pa = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
			pa->start_index = 0;
			pa->end_index = G_MAXINT;
			pango_attr_list_insert(pal, pa);
			}
		if (pi->text_attr & TEXT_ATTR_HEADING)
			{
			pa = pango_attr_scale_new(PANGO_SCALE_LARGE);
			pa->start_index = 0;
			pa->end_index = G_MAXINT;
			pango_attr_list_insert(pal, pa);
			}
		pango_layout_set_attributes(layout, pal);
		pango_attr_list_unref(pal);
		}

	pango_layout_set_text(layout, pi->text, -1);
	return layout;
}

static void pan_item_text_compute_size(PanItem *pi, GtkWidget *widget)
{
	PangoLayout *layout;

	if (!pi || !pi->text || !widget) return;

	layout = pan_item_text_layout(pi, widget);
	pango_layout_get_pixel_size(layout, &pi->width, &pi->height);
	g_object_unref(G_OBJECT(layout));

	pi->width += PAN_TEXT_BORDER_SIZE * 2;
	pi->height += PAN_TEXT_BORDER_SIZE * 2;
}

static PanItem *pan_item_new_text(PanWindow *pw, gint x, gint y, const gchar *text, TextAttrType attr,
				  guint8 r, guint8 g, guint8 b, guint8 a)
{
	PanItem *pi;

	pi = g_new0(PanItem, 1);
	pi->type = ITEM_TEXT;
	pi->x = x;
	pi->y = y;
	pi->text = g_strdup(text);
	pi->text_attr = attr;

	pi->color_r = r;
	pi->color_g = g;
	pi->color_b = b;
	pi->color_a = a;

	pan_item_text_compute_size(pi, pw->imd->pr);

	pw->list = g_list_prepend(pw->list, pi);

	return pi;
}

static void pan_item_set_key(PanItem *pi, const gchar *key)
{
	gchar *tmp;

	if (!pi) return;

	tmp = pi->key;
	pi->key = g_strdup(key);
	g_free(tmp);
}

static void pan_item_added(PanWindow *pw, PanItem *pi)
{
	if (!pi) return;
	image_area_changed(pw->imd, pi->x, pi->y, pi->width, pi->height);
}

static void pan_item_remove(PanWindow *pw, PanItem *pi)
{
	if (!pi) return;

	if (pw->click_pi == pi) pw->click_pi = NULL;
	if (pw->queue_pi == pi)	pw->queue_pi = NULL;
	if (pw->search_pi == pi) pw->search_pi = NULL;
	pw->queue = g_list_remove(pw->queue, pi);

	pw->list = g_list_remove(pw->list, pi);
	image_area_changed(pw->imd, pi->x, pi->y, pi->width, pi->height);
	pan_item_free(pi);
}

static void pan_item_size_by_item(PanItem *pi, PanItem *child, gint border)
{
	if (!pi || !child) return;

	if (pi->x + pi->width < child->x + child->width + border)
		pi->width = child->x + child->width + border - pi->x;

	if (pi->y + pi->height < child->y + child->height + border)
		pi->height = child->y + child->height + border - pi->y;
}

static void pan_item_size_coordinates(PanItem *pi, gint border, gint *w, gint *h)
{
	if (!pi) return;

	if (*w < pi->x + pi->width + border) *w = pi->x + pi->width + border;
	if (*h < pi->y + pi->height + border) *h = pi->y + pi->height + border;
}

static void pan_item_image_find_size(PanWindow *pw, PanItem *pi, gint w, gint h)
{
	GList *work;

	pi->width = w;
	pi->height = h;

	if (!pi->fd) return;

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

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

		path = ((FileData *)pc)->path;

		if (pc->cd && pc->cd->dimensions &&
		    path && strcmp(path, pi->fd->path) == 0)
			{
			pi->width = MAX(1, pc->cd->width * pw->image_size / 100);
			pi->height = MAX(1, pc->cd->height * pw->image_size / 100);

			pw->cache_list = g_list_remove(pw->cache_list, pc);
			cache_sim_data_free(pc->cd);
			file_data_free((FileData *)pc);
			return;
			}
		}
}

static PanItem *pan_item_new_image(PanWindow *pw, FileData *fd, gint x, gint y, gint w, gint h)
{
	PanItem *pi;

	pi = g_new0(PanItem, 1);
	pi->type = ITEM_IMAGE;
	pi->fd = fd;
	pi->x = x;
	pi->y = y;

	pan_item_image_find_size(pw, pi, w, h);

	pw->list = g_list_prepend(pw->list, pi);

	return pi;
}

static PanItem *pan_item_find_by_key(PanWindow *pw, ItemType type, const gchar *key)
{
	GList *work;

	if (!key) return NULL;

	work = g_list_last(pw->list);
	while (work)
		{
		PanItem *pi;

		pi = work->data;
		if ((pi->type == type || type == ITEM_NONE) &&
		     pi->key && strcmp(pi->key, key) == 0)
			{
			return pi;
			}
		work = work->prev;
		}
	work = g_list_last(pw->list_static);
	while (work)
		{
		PanItem *pi;

		pi = work->data;
		if ((pi->type == type || type == ITEM_NONE) &&
		     pi->key && strcmp(pi->key, key) == 0)
			{
			return pi;
			}
		work = work->prev;
		}

	return NULL;
}

/* when ignore_case and partial are TRUE, path should be converted to lower case */
static GList *pan_item_find_by_path_l(GList *list, GList *search_list,
				      ItemType type, const gchar *path,
				      gint ignore_case, gint partial)
{
	GList *work;

	work = g_list_last(search_list);
	while (work)
		{
		PanItem *pi;

		pi = work->data;
		if ((pi->type == type || type == ITEM_NONE) && pi->fd)
			{
			gint match = FALSE;

			if (path[0] == '/')
				{
				if (pi->fd->path && strcmp(path, pi->fd->path) == 0) match = TRUE;
				}
			else if (pi->fd->name)
				{
				if (partial)
					{
					if (ignore_case)
						{
						gchar *haystack;

						haystack = g_utf8_strdown(pi->fd->name, -1);
						match = (strstr(haystack, path) != NULL);
						g_free(haystack);
						}
					else
						{
						if (strstr(pi->fd->name, path)) match = TRUE;
						}
					}
				else if (ignore_case)
					{
					if (strcasecmp(path, pi->fd->name) == 0) match = TRUE;
					}
				else
					{
					if (strcmp(path, pi->fd->name) == 0) match = TRUE;
					}
				}

			if (match) list = g_list_prepend(list, pi);
			}
		work = work->prev;
		}

	return list;
}

/* when ignore_case and partial are TRUE, path should be converted to lower case */
static GList *pan_item_find_by_path(PanWindow *pw, ItemType type, const gchar *path,
				    gint ignore_case, gint partial)
{
	GList *list = NULL;

	if (!path) return NULL;
	if (partial && path[0] == '/') return NULL;

	list = pan_item_find_by_path_l(list, pw->list_static, type, path, ignore_case, partial);
	list = pan_item_find_by_path_l(list, pw->list, type, path, ignore_case, partial);

	return g_list_reverse(list);
}

static PanItem *pan_item_find_by_coord_l(GList *list, ItemType type, gint x, gint y, const gchar *key)
{
	GList *work;

	work = list;
	while (work)
		{
		PanItem *pi;

		pi = work->data;
		if ((pi->type == type || type == ITEM_NONE) &&
		     x >= pi->x && x < pi->x + pi->width &&
		     y >= pi->y && y < pi->y + pi->height &&
		    (!key || (pi->key && strcmp(pi->key, key) == 0)))
			{
			return pi;
			}