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#include <config.h>
#include "ev-page-cache.h"
#include "ev-document-thumbnails.h"
#include "ev-page.h"
#include <stdlib.h>
#include <string.h>
struct _EvPageCache
{
GObject parent;
EvDocument *document;
gint current_page;
gboolean dual_even_left;
int rotation;
};
struct _EvPageCacheClass
{
GObjectClass parent_class;
void (* page_changed) (EvPageCache *page_cache, gint page);
void (* history_changed) (EvPageCache *page_cache, gint page);
};
enum
{
PAGE_CHANGED,
HISTORY_CHANGED,
N_SIGNALS,
};
static guint signals[N_SIGNALS] = {0, };
static void ev_page_cache_init (EvPageCache *page_cache);
static void ev_page_cache_class_init (EvPageCacheClass *page_cache);
static void ev_page_cache_finalize (GObject *object);
G_DEFINE_TYPE (EvPageCache, ev_page_cache, G_TYPE_OBJECT)
static void
ev_page_cache_init (EvPageCache *page_cache)
{
page_cache->current_page = -1;
}
static void
ev_page_cache_class_init (EvPageCacheClass *class)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (class);
object_class->finalize = ev_page_cache_finalize;
signals [PAGE_CHANGED] =
g_signal_new ("page-changed",
EV_TYPE_PAGE_CACHE,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EvPageCacheClass, page_changed),
NULL, NULL,
g_cclosure_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
signals [HISTORY_CHANGED] =
g_signal_new ("history-changed",
EV_TYPE_PAGE_CACHE,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (EvPageCacheClass, history_changed),
NULL, NULL,
g_cclosure_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
}
static void
ev_page_cache_finalize (GObject *object)
{
EvPageCache *page_cache = EV_PAGE_CACHE (object);
page_cache->document = NULL;
G_OBJECT_CLASS (ev_page_cache_parent_class)->finalize (object);
}
static EvPageCache *
ev_page_cache_new (EvDocument *document)
{
EvPageCache *page_cache;
page_cache = (EvPageCache *) g_object_new (EV_TYPE_PAGE_CACHE, NULL);
page_cache->document = document;
if (ev_document_get_n_pages (page_cache->document) > 0)
ev_page_cache_set_current_page (page_cache, 0);
return page_cache;
}
gint
ev_page_cache_get_current_page (EvPageCache *page_cache)
{
g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
return page_cache->current_page;
}
void
ev_page_cache_set_current_page (EvPageCache *page_cache,
int page)
{
g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
if (page == page_cache->current_page)
return;
page_cache->current_page = page;
g_signal_emit (page_cache, signals[PAGE_CHANGED], 0, page);
}
void
ev_page_cache_set_current_page_history (EvPageCache *page_cache,
int page)
{
if (abs (page - page_cache->current_page) > 1)
g_signal_emit (page_cache, signals [HISTORY_CHANGED], 0, page);
ev_page_cache_set_current_page (page_cache, page);
}
gboolean
ev_page_cache_set_page_label (EvPageCache *page_cache,
const gchar *page_label)
{
gint page;
g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), FALSE);
if (ev_document_find_page_by_label (page_cache->document, page_label, &page)) {
ev_page_cache_set_current_page (page_cache, page);
return TRUE;
}
return FALSE;
}
void
ev_page_cache_get_size (EvPageCache *page_cache,
gint page,
gint rotation,
gfloat scale,
gint *width,
gint *height)
{
double w, h;
g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
ev_document_get_page_size (page_cache->document, page, &w, &h);
w = w * scale + 0.5;
h = h * scale + 0.5;
if (rotation == 0 || rotation == 180) {
if (width) *width = (int)w;
if (height) *height = (int)h;
} else {
if (width) *width = (int)h;
if (height) *height = (int)w;
}
}
void
ev_page_cache_get_max_width (EvPageCache *page_cache,
gint rotation,
gfloat scale,
gint *width)
{
double w, h;
g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
if (!width)
return;
ev_document_get_max_page_size (page_cache->document, &w, &h);
*width = (rotation == 0 || rotation == 180) ? w * scale : h * scale;
}
void
ev_page_cache_get_max_height (EvPageCache *page_cache,
gint rotation,
gfloat scale,
gint *height)
{
double w, h;
g_return_if_fail (EV_IS_PAGE_CACHE (page_cache));
if (!height)
return;
ev_document_get_max_page_size (page_cache->document, &w, &h);
*height = (rotation == 0 || rotation == 180) ? h * scale : w * scale;
}
gboolean
ev_page_cache_get_dual_even_left (EvPageCache *page_cache)
{
g_return_val_if_fail (EV_IS_PAGE_CACHE (page_cache), 0);
return (ev_document_get_n_pages (page_cache->document) > 2);
}
#define PAGE_CACHE_STRING "ev-page-cache"
EvPageCache *
ev_page_cache_get (EvDocument *document)
{
EvPageCache *page_cache;
g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
page_cache = g_object_get_data (G_OBJECT (document), PAGE_CACHE_STRING);
if (page_cache == NULL) {
page_cache = ev_page_cache_new (document);
g_object_set_data_full (G_OBJECT (document), PAGE_CACHE_STRING, page_cache, g_object_unref);
}
return page_cache;
}
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