X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=libdocument%2Fev-document.c;h=78fb8a08f2de918ee52789a67f56492bde42523b;hb=b03015826c22cb2c28a0d0507963c23b9c9ddcb3;hp=9d1144a1b71997bde47f3915aa5aecbd6c9eb5ff;hpb=3d3328b2597e9b85afcb552ffc6abdeca1e3e3a7;p=evince.git

diff --git a/libdocument/ev-document.c b/libdocument/ev-document.c
index 9d1144a1..78fb8a08 100644
--- a/libdocument/ev-document.c
+++ b/libdocument/ev-document.c
@@ -1,5 +1,6 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
 /*
+ *  Copyright (C) 2009 Carlos Garcia Campos
  *  Copyright (C) 2004 Marco Pesenti Gritti
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -14,18 +15,64 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  *
  */
 
 #include "config.h"
 
+#include <stdlib.h>
+#include <string.h>
+
 #include "ev-document.h"
+#include "ev-document-misc.h"
+#include "synctex_parser.h"
+
+#define EV_DOCUMENT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), EV_TYPE_DOCUMENT, EvDocumentPrivate))
+
+typedef struct _EvPageSize
+{
+	gdouble width;
+	gdouble height;
+} EvPageSize;
+
+struct _EvDocumentPrivate
+{
+	gchar          *uri;
+
+	gint            n_pages;
+
+	gboolean        uniform;
+	gdouble         uniform_width;
+	gdouble         uniform_height;
+
+	gdouble         max_width;
+	gdouble         max_height;
+	gdouble         min_width;
+	gdouble         min_height;
+	gint            max_label;
+
+	gchar         **page_labels;
+	EvPageSize     *page_sizes;
+	EvDocumentInfo *info;
+
+	synctex_scanner_t synctex_scanner;
+};
+
+static gint            _ev_document_get_n_pages     (EvDocument *document);
+static void            _ev_document_get_page_size   (EvDocument *document,
+						     EvPage     *page,
+						     double     *width,
+						     double     *height);
+static gchar          *_ev_document_get_page_label  (EvDocument *document,
+						     EvPage     *page);
+static EvDocumentInfo *_ev_document_get_info        (EvDocument *document);
+static gboolean        _ev_document_support_synctex (EvDocument *document);
 
 GMutex *ev_doc_mutex = NULL;
 GMutex *ev_fc_mutex = NULL;
 
-EV_DEFINE_INTERFACE (EvDocument, ev_document, G_TYPE_OBJECT)
+G_DEFINE_ABSTRACT_TYPE (EvDocument, ev_document, G_TYPE_OBJECT)
 
 GQuark
 ev_document_error_quark (void)
@@ -37,9 +84,78 @@ ev_document_error_quark (void)
   return q;
 }
 
+static EvPage *
+ev_document_impl_get_page (EvDocument *document,
+			   gint        index)
+{
+	return ev_page_new (index);
+}
+
+static EvDocumentInfo *
+ev_document_impl_get_info (EvDocument *document)
+{
+	return g_new0 (EvDocumentInfo, 1);
+}
+
 static void
-ev_document_class_init (EvDocumentIface *klass)
+ev_document_finalize (GObject *object)
 {
+	EvDocument *document = EV_DOCUMENT (object);
+
+	if (document->priv->uri) {
+		g_free (document->priv->uri);
+		document->priv->uri = NULL;
+	}
+
+	if (document->priv->page_sizes) {
+		g_free (document->priv->page_sizes);
+		document->priv->page_sizes = NULL;
+	}
+
+	if (document->priv->page_labels) {
+		gint i;
+
+		for (i = 0; i < document->priv->n_pages; i++) {
+			g_free (document->priv->page_labels[i]);
+		}
+		g_free (document->priv->page_labels);
+		document->priv->page_labels = NULL;
+	}
+
+	if (document->priv->info) {
+		ev_document_info_free (document->priv->info);
+		document->priv->info = NULL;
+	}
+
+	if (document->priv->synctex_scanner) {
+		synctex_scanner_free (document->priv->synctex_scanner);
+		document->priv->synctex_scanner = NULL;
+	}
+
+	G_OBJECT_CLASS (ev_document_parent_class)->finalize (object);
+}
+
+static void
+ev_document_init (EvDocument *document)
+{
+	document->priv = EV_DOCUMENT_GET_PRIVATE (document);
+
+	/* Assume all pages are the same size until proven otherwise */
+	document->priv->uniform = TRUE;
+}
+
+static void
+ev_document_class_init (EvDocumentClass *klass)
+{
+	GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
+
+	g_type_class_add_private (g_object_class, sizeof (EvDocumentPrivate));
+
+	klass->get_page = ev_document_impl_get_page;
+	klass->get_info = ev_document_impl_get_info;
+	klass->get_backend_info = NULL;
+
+	g_object_class->finalize = ev_document_finalize;
 }
 
 GMutex *
@@ -118,16 +234,16 @@ ev_document_load (EvDocument  *document,
 		  const char  *uri,
 		  GError     **error)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 	gboolean retval;
 	GError *err = NULL;
 
-	retval = iface->load (document, uri, &err);
+	retval = klass->load (document, uri, &err);
 	if (!retval) {
 		if (err) {
 			g_propagate_error (error, err);
 		} else {
-			g_warning ("%s::EvDocumentIface::load returned FALSE but did not fill in @error; fix the backend!\n",
+			g_warning ("%s::EvDocument::load returned FALSE but did not fill in @error; fix the backend!\n",
 				   G_OBJECT_TYPE_NAME (document));
 
 			/* So upper layers don't crash */
@@ -136,6 +252,88 @@ ev_document_load (EvDocument  *document,
 					     EV_DOCUMENT_ERROR_INVALID,
 					     "Internal error in backend");
 		}
+	} else {
+		gint i;
+		EvDocumentPrivate *priv = document->priv;
+
+		/* Cache some info about the document to avoid
+		 * going to the backends since it requires locks
+		 */
+		priv->uri = g_strdup (uri);
+		priv->n_pages = _ev_document_get_n_pages (document);
+
+		for (i = 0; i < priv->n_pages; i++) {
+			EvPage     *page = ev_document_get_page (document, i);
+			gdouble     page_width = 0;
+			gdouble     page_height = 0;
+			EvPageSize *page_size;
+			gchar      *page_label;
+
+			_ev_document_get_page_size (document, page, &page_width, &page_height);
+
+			if (i == 0) {
+				priv->uniform_width = page_width;
+				priv->uniform_height = page_height;
+				priv->max_width = priv->uniform_width;
+				priv->max_height = priv->uniform_height;
+				priv->min_width = priv->uniform_width;
+				priv->min_height = priv->uniform_height;
+			} else if (priv->uniform &&
+				   (priv->uniform_width != page_width ||
+				    priv->uniform_height != page_height)) {
+				/* It's a different page size.  Backfill the array. */
+				int j;
+
+				priv->page_sizes = g_new0 (EvPageSize, priv->n_pages);
+
+				for (j = 0; j < i; j++) {
+					page_size = &(priv->page_sizes[j]);
+					page_size->width = priv->uniform_width;
+					page_size->height = priv->uniform_height;
+				}
+				priv->uniform = FALSE;
+			}
+			if (!priv->uniform) {
+				page_size = &(priv->page_sizes[i]);
+
+				page_size->width = page_width;
+				page_size->height = page_height;
+
+				if (page_width > priv->max_width)
+					priv->max_width = page_width;
+				if (page_width < priv->min_width)
+					priv->min_width = page_width;
+
+				if (page_height > priv->max_height)
+					priv->max_height = page_height;
+				if (page_height < priv->min_height)
+					priv->min_height = page_height;
+			}
+
+			page_label = _ev_document_get_page_label (document, page);
+			if (page_label) {
+				if (!priv->page_labels)
+					priv->page_labels = g_new0 (gchar *, priv->n_pages);
+
+				priv->page_labels[i] = page_label;
+				priv->max_label = MAX (priv->max_label,
+						       g_utf8_strlen (page_label, 256));
+			}
+
+			g_object_unref (page);
+		}
+
+		priv->info = _ev_document_get_info (document);
+		if (_ev_document_support_synctex (document)) {
+			gchar *filename;
+
+			filename = g_filename_from_uri (uri, NULL, NULL);
+			if (filename != NULL) {
+				priv->synctex_scanner =
+					synctex_scanner_new_with_output_file (filename, NULL, 1);
+				g_free (filename);
+			}
+		}
 	}
 
 	return retval;
@@ -156,83 +354,387 @@ ev_document_save (EvDocument  *document,
 		  const char  *uri,
 		  GError     **error)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	gboolean retval;
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	retval = iface->save (document, uri, error);
+	return klass->save (document, uri, error);
+}
 
-	return retval;
+EvPage *
+ev_document_get_page (EvDocument *document,
+		      gint        index)
+{
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
+
+	return klass->get_page (document, index);
 }
 
-int
-ev_document_get_n_pages (EvDocument  *document)
+static gboolean
+_ev_document_support_synctex (EvDocument *document)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	gint retval;
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	retval = iface->get_n_pages (document);
+	return klass->support_synctex ? klass->support_synctex (document) : FALSE;
+}
 
-	return retval;
+gboolean
+ev_document_has_synctex (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), FALSE);
+
+	return document->priv->synctex_scanner != NULL;
 }
 
-EvPage *
-ev_document_get_page (EvDocument *document,
-		      gint        index)
+/**
+ * ev_document_synctex_backward_search:
+ * @document:
+ * @page: the target page
+ * @x:
+ * @y:
+ *
+ * Peforms a Synctex backward search to obtain the TeX input file, line and
+ * (possibly) column  corresponding to the  position (@x,@y) (in 72dpi
+ * coordinates) in the  @page of @document.
+ *
+ * Returns: A pointer to the EvSourceLink structure that holds the result. @NULL if synctex
+ * is not enabled for the document or no result is found.
+ * The EvSourceLink pointer should be freed with g_free after it is used.
+ */
+EvSourceLink *
+ev_document_synctex_backward_search (EvDocument *document,
+                                     gint        page_index,
+                                     gfloat      x,
+                                     gfloat      y)
+{
+        EvSourceLink *result = NULL;
+        synctex_scanner_t scanner;
+
+        g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
+
+        scanner = document->priv->synctex_scanner;
+        if (!scanner)
+                return NULL;
+
+        if (synctex_edit_query (scanner, page_index + 1, x, y) > 0) {
+                synctex_node_t node;
+
+                /* We assume that a backward search returns either zero or one result_node */
+                node = synctex_next_result (scanner);
+                if (node != NULL) {
+			const gchar *filename;
+
+			filename = synctex_scanner_get_name (scanner, synctex_node_tag (node));
+			
+			if (filename) {
+				result = g_new (EvSourceLink, 1);
+				result->filename = filename;
+				result->line = synctex_node_line (node);
+				result->col = synctex_node_column (node);
+			}
+                }
+        }
+
+        return result;
+}
+
+/**
+ * ev_document_synctex_forward_search:
+ * @document:
+ * @source_link:
+ *
+ * Peforms a Synctex forward search to obtain the area in the document
+ * corresponding to the position @line and @column number in the source Tex file
+ *
+ * Returns: An EvMapping with the page number and area corresponfing to
+ * the given line in the source file. It must be free with g_free when done
+ */
+EvMapping *
+ev_document_synctex_forward_search (EvDocument   *document,
+				    EvSourceLink *link)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	EvPage *retval;
+        EvMapping        *result = NULL;
+        synctex_scanner_t scanner;
 
-	if (iface->get_page)
-		retval = iface->get_page (document, index);
-	else
-		retval = ev_page_new (index);
+        g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
 
-	return retval;
+        scanner = document->priv->synctex_scanner;
+        if (!scanner)
+                return NULL;
+
+        if (synctex_display_query (scanner, link->filename, link->line, link->col) > 0) {
+                synctex_node_t node;
+                gint           page;
+
+                if ((node = synctex_next_result (scanner))) {
+                        result = g_new (EvMapping, 1);
+
+                        page = synctex_node_page (node) - 1;
+                        result->data = GINT_TO_POINTER (page);
+
+                        result->area.x1 = synctex_node_box_visible_h (node);
+                        result->area.y1 = synctex_node_box_visible_v (node) -
+                                synctex_node_box_visible_height (node);
+                        result->area.x2 = synctex_node_box_visible_width (node) + result->area.x1;
+                        result->area.y2 = synctex_node_box_visible_depth (node) +
+                                synctex_node_box_visible_height (node) + result->area.y1;
+                }
+        }
+
+        return result;
+}
+
+static gint
+_ev_document_get_n_pages (EvDocument  *document)
+{
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
+
+	return klass->get_n_pages (document);
+}
+
+gint
+ev_document_get_n_pages (EvDocument  *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), 0);
+
+	return document->priv->n_pages;
+}
+
+static void
+_ev_document_get_page_size (EvDocument *document,
+			    EvPage     *page,
+			    double     *width,
+			    double     *height)
+{
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
+
+	klass->get_page_size (document, page, width, height);
 }
 
 void
 ev_document_get_page_size (EvDocument *document,
-			   EvPage     *page,
+			   gint        page_index,
 			   double     *width,
 			   double     *height)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	g_return_if_fail (EV_IS_DOCUMENT (document));
+	g_return_if_fail (page_index >= 0 || page_index < document->priv->n_pages);
+
+	if (width)
+		*width = document->priv->uniform ?
+			document->priv->uniform_width :
+			document->priv->page_sizes[page_index].width;
+	if (height)
+		*height = document->priv->uniform ?
+			document->priv->uniform_height :
+			document->priv->page_sizes[page_index].height;
+}
+
+static gchar *
+_ev_document_get_page_label (EvDocument *document,
+			     EvPage     *page)
+{
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	iface->get_page_size (document, page, width, height);
+	return klass->get_page_label ?
+		klass->get_page_label (document, page) : NULL;
 }
 
-char *
+gchar *
 ev_document_get_page_label (EvDocument *document,
-			    EvPage     *page)
+			    gint        page_index)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
+	g_return_val_if_fail (page_index >= 0 || page_index < document->priv->n_pages, NULL);
 
-	if (iface->get_page_label == NULL)
-		return NULL;
+	return (document->priv->page_labels && document->priv->page_labels[page_index]) ?
+		g_strdup (document->priv->page_labels[page_index]) :
+		g_strdup_printf ("%d", page_index + 1);
+}
+
+static EvDocumentInfo *
+_ev_document_get_info (EvDocument *document)
+{
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	return iface->get_page_label (document, page);
+	return klass->get_info (document);
 }
 
 EvDocumentInfo *
 ev_document_get_info (EvDocument *document)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
 
-	return iface->get_info (document);
+	return document->priv->info;
+}
+
+gboolean
+ev_document_get_backend_info (EvDocument *document, EvDocumentBackendInfo *info)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), FALSE);
+
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
+	if (klass->get_backend_info == NULL)
+		return FALSE;
+
+	return klass->get_backend_info (document, info);
 }
 
 cairo_surface_t *
 ev_document_render (EvDocument      *document,
 		    EvRenderContext *rc)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	cairo_surface_t *retval;
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	g_assert (iface->render);
+	return klass->render (document, rc);
+}
 
-	retval = iface->render (document, rc);
+static GdkPixbuf *
+_ev_document_get_thumbnail (EvDocument      *document,
+			    EvRenderContext *rc)
+{
+	cairo_surface_t *surface;
+	GdkPixbuf       *pixbuf;
 
-	return retval;
+	surface = ev_document_render (document, rc);
+	pixbuf = ev_document_misc_pixbuf_from_surface (surface);
+	cairo_surface_destroy (surface);
+
+	return pixbuf;
+}
+
+GdkPixbuf *
+ev_document_get_thumbnail (EvDocument      *document,
+			   EvRenderContext *rc)
+{
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
+
+	if (klass->get_thumbnail)
+		return klass->get_thumbnail (document, rc);
+
+	return _ev_document_get_thumbnail (document, rc);
+}
+
+const gchar *
+ev_document_get_uri (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
+
+	return document->priv->uri;
+}
+
+const gchar *
+ev_document_get_title (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), NULL);
+
+	return (document->priv->info->fields_mask & EV_DOCUMENT_INFO_TITLE) ?
+		document->priv->info->title : NULL;
+}
+
+gboolean
+ev_document_is_page_size_uniform (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), TRUE);
+
+	return document->priv->uniform;
+}
+
+void
+ev_document_get_max_page_size (EvDocument *document,
+			       gdouble    *width,
+			       gdouble    *height)
+{
+	g_return_if_fail (EV_IS_DOCUMENT (document));
+
+	if (width)
+		*width = document->priv->max_width;
+	if (height)
+		*height = document->priv->max_height;
+}
+
+void
+ev_document_get_min_page_size (EvDocument *document,
+			       gdouble    *width,
+			       gdouble    *height)
+{
+	g_return_if_fail (EV_IS_DOCUMENT (document));
+
+	if (width)
+		*width = document->priv->min_width;
+	if (height)
+		*height = document->priv->min_height;
+}
+
+gboolean
+ev_document_check_dimensions (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), FALSE);
+
+	return (document->priv->max_width > 0 && document->priv->max_height > 0);
+}
+
+gint
+ev_document_get_max_label_len (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), -1);
+
+	return document->priv->max_label;
+}
+
+gboolean
+ev_document_has_text_page_labels (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), FALSE);
+
+	return document->priv->page_labels != NULL;
+}
+
+gboolean
+ev_document_find_page_by_label (EvDocument  *document,
+				const gchar *page_label,
+				gint        *page_index)
+{
+	gint i, page;
+	glong value;
+	gchar *endptr = NULL;
+	EvDocumentPrivate *priv = document->priv;
+
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), FALSE);
+	g_return_val_if_fail (page_label != NULL, FALSE);
+	g_return_val_if_fail (page_index != NULL, FALSE);
+
+        /* First, look for a literal label match */
+	for (i = 0; priv->page_labels && i < priv->n_pages; i ++) {
+		if (priv->page_labels[i] != NULL &&
+		    ! strcmp (page_label, priv->page_labels[i])) {
+			*page_index = i;
+			return TRUE;
+		}
+	}
+
+	/* Second, look for a match with case insensitively */
+	for (i = 0; priv->page_labels && i < priv->n_pages; i++) {
+		if (priv->page_labels[i] != NULL &&
+		    ! strcasecmp (page_label, priv->page_labels[i])) {
+			*page_index = i;
+			return TRUE;
+		}
+	}
+
+	/* Next, parse the label, and see if the number fits */
+	value = strtol (page_label, &endptr, 10);
+	if (endptr[0] == '\0') {
+		/* Page number is an integer */
+		page = MIN (G_MAXINT, value);
+
+		/* convert from a page label to a page offset */
+		page --;
+		if (page >= 0 && page < priv->n_pages) {
+			*page_index = page;
+			return TRUE;
+		}
+	}
+
+	return FALSE;
 }
 
 /* EvDocumentInfo */
@@ -263,6 +765,8 @@ ev_document_info_copy (EvDocumentInfo *info)
 	copy->ui_hints = info->ui_hints;
 	copy->permissions = info->permissions;
 	copy->n_pages = info->n_pages;
+	copy->license = ev_document_license_copy (info->license);
+
 	copy->fields_mask = info->fields_mask;
 
 	return copy;
@@ -283,10 +787,71 @@ ev_document_info_free (EvDocumentInfo *info)
 	g_free (info->producer);
 	g_free (info->linearized);
 	g_free (info->security);
-	
+	ev_document_license_free (info->license);
+
 	g_free (info);
 }
 
+/* EvDocumentLicense */
+EV_DEFINE_BOXED_TYPE (EvDocumentLicense, ev_document_license, ev_document_license_copy, ev_document_license_free)
+
+EvDocumentLicense *
+ev_document_license_new (void)
+{
+	return g_new0 (EvDocumentLicense, 1);
+}
+
+EvDocumentLicense *
+ev_document_license_copy (EvDocumentLicense *license)
+{
+	EvDocumentLicense *new_license;
+
+	if (!license)
+		return NULL;
+
+	new_license = ev_document_license_new ();
+
+	if (license->text)
+		new_license->text = g_strdup (license->text);
+	if (license->uri)
+		new_license->uri = g_strdup (license->uri);
+	if (license->web_statement)
+		new_license->web_statement = g_strdup (license->web_statement);
+
+	return new_license;
+}
+
+void
+ev_document_license_free (EvDocumentLicense *license)
+{
+	if (!license)
+		return;
+
+	g_free (license->text);
+	g_free (license->uri);
+	g_free (license->web_statement);
+
+	g_free (license);
+}
+
+const gchar *
+ev_document_license_get_text (EvDocumentLicense *license)
+{
+	return license->text;
+}
+
+const gchar *
+ev_document_license_get_uri (EvDocumentLicense *license)
+{
+	return license->uri;
+}
+
+const gchar *
+ev_document_license_get_web_statement (EvDocumentLicense *license)
+{
+	return license->web_statement;
+}
+
 /* EvRectangle */
 EV_DEFINE_BOXED_TYPE (EvRectangle, ev_rectangle, ev_rectangle_copy, ev_rectangle_free)