X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=libdocument%2Fev-document.c;h=b770f1092f34ee2dd73992dbd5fc798dbf0d0e84;hb=82e3135caffacbff9a606bca854c6af01bd0b049;hp=a951bfa3fa83560534e113ba24ddbe38acc34112;hpb=13a06349251874bd35d2f03c3fc93217cee749a2;p=evince.git

diff --git a/libdocument/ev-document.c b/libdocument/ev-document.c
index a951bfa3..b770f109 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
@@ -20,39 +21,51 @@
 
 #include "config.h"
 
+#include <stdlib.h>
+#include <string.h>
+
 #include "ev-document.h"
 
-#include "ev-backend-marshalers.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;
+	gint            max_label;
 
-static void ev_document_class_init (gpointer g_class);
+	gchar         **page_labels;
+	EvPageSize     *page_sizes;
+	EvDocumentInfo *info;
+};
 
+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);
 
 GMutex *ev_doc_mutex = NULL;
 GMutex *ev_fc_mutex = NULL;
 
-#define LOG(x) 
-GType
-ev_document_get_type (void)
-{
-	static GType type = 0;
-
-	if (G_UNLIKELY (type == 0))
-	{
-		const GTypeInfo our_info =
-		{
-			sizeof (EvDocumentIface),
-			NULL,
-			NULL,
-			(GClassInitFunc)ev_document_class_init
-		};
-
-		type = g_type_register_static (G_TYPE_INTERFACE,
-					       "EvDocument",
-					       &our_info, (GTypeFlags)0);
-	}
-
-	return type;
-}
+G_DEFINE_ABSTRACT_TYPE (EvDocument, ev_document, G_TYPE_OBJECT)
 
 GQuark
 ev_document_error_quark (void)
@@ -64,9 +77,72 @@ 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 (gpointer g_class)
+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;
+	}
+
+	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;
+
+	g_object_class->finalize = ev_document_finalize;
 }
 
 GMutex *
@@ -90,6 +166,12 @@ ev_document_doc_mutex_unlock (void)
 	g_mutex_unlock (ev_document_get_doc_mutex ());
 }
 
+gboolean
+ev_document_doc_mutex_trylock (void)
+{
+	return g_mutex_trylock (ev_document_get_doc_mutex ());
+}
+
 GMutex *
 ev_document_get_fc_mutex (void)
 {
@@ -111,138 +193,396 @@ ev_document_fc_mutex_unlock (void)
 	g_mutex_unlock (ev_document_get_fc_mutex ());
 }
 
+gboolean
+ev_document_fc_mutex_trylock (void)
+{
+	return g_mutex_trylock (ev_document_get_fc_mutex ());
+}
+
+/**
+ * ev_document_load:
+ * @document: a #EvDocument
+ * @uri: the document's URI
+ * @error: a #GError location to store an error, or %NULL
+ *
+ * Loads @document from @uri.
+ * 
+ * On failure, %FALSE is returned and @error is filled in.
+ * If the document is encrypted, EV_DEFINE_ERROR_ENCRYPTED is returned.
+ * If the backend cannot load the specific document, EV_DOCUMENT_ERROR_INVALID
+ * is returned. Other errors are possible too, depending on the backend
+ * used to load the document and the URI, e.g. #GIOError, #GFileError, and
+ * #GConvertError.
+ *
+ * Returns: %TRUE on success, or %FALSE on failure.
+ */
 gboolean
 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;
-	LOG ("ev_document_load");
-	retval = iface->load (document, uri, error);
+	GError *err = NULL;
+
+	retval = klass->load (document, uri, &err);
+	if (!retval) {
+		if (err) {
+			g_propagate_error (error, err);
+		} else {
+			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 */
+			g_set_error_literal (error,
+					     EV_DOCUMENT_ERROR,
+					     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);
+		priv->info = _ev_document_get_info (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;
+			} 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_height > priv->max_height)
+					priv->max_height = page_height;
+			}
+
+			page_label = _ev_document_get_page_label (document, page);
+			if (page_label) {
+				if (priv->page_labels) {
+					priv->page_labels[i] = page_label;
+				} else {
+					gchar *numeric_label;
+
+					numeric_label = g_strdup_printf ("%d", i + 1);
+					if (strcmp (numeric_label, page_label) != 0) {
+						priv->page_labels = g_new0 (gchar *, priv->n_pages);
+						priv->page_labels[i] = page_label;
+					}
+					g_free (numeric_label);
+				}
+				priv->max_label = MAX (priv->max_label,
+						       g_utf8_strlen (page_label, 256));
+			}
+
+			g_object_unref (page);
+		}
+	}
 
 	return retval;
 }
 
+/**
+ * ev_document_save:
+ * @document:
+ * @uri: the target URI
+ * @error: a #GError location to store an error, or %NULL
+ *
+ * Saves @document to @uri.
+ * 
+ * Returns: %TRUE on success, or %FALSE on error with @error filled in
+ */
 gboolean
 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);
 
-	LOG ("ev_document_save");
-	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
+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)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	gint retval;
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), 0);
 
-	LOG ("ev_document_get_n_pages");
-	retval = iface->get_n_pages (document);
+	return document->priv->n_pages;
+}
 
-	return retval;
+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,
-			     int           page,
-			     double       *width,
-			     double       *height)
+ev_document_get_page_size (EvDocument *document,
+			   gint        page_index,
+			   double     *width,
+			   double     *height)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-
-	LOG ("ev_document_get_page_size");
-	iface->get_page_size (document, page, width, height);
+	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;
 }
 
-char *
-ev_document_get_page_label(EvDocument    *document,
-			   int             page)
+static gchar *
+_ev_document_get_page_label (EvDocument *document,
+			     EvPage     *page)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	LOG ("ev_document_get_page_label");
-	if (iface->get_page_label == NULL)
-		return NULL;
+	return klass->get_page_label ?
+		klass->get_page_label (document, page) : NULL;
+}
+
+gchar *
+ev_document_get_page_label (EvDocument *document,
+			    gint        page_index)
+{
+	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);
 
-	return iface->get_page_label (document, page);
+	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);
 }
 
-gboolean
-ev_document_can_get_text (EvDocument  *document)
+static EvDocumentInfo *
+_ev_document_get_info (EvDocument *document)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	return iface->can_get_text (document);
+	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;
 }
 
-char *
-ev_document_get_text (EvDocument  *document,
-		      int          page,
-		      EvRectangle *rect)
+cairo_surface_t *
+ev_document_render (EvDocument      *document,
+		    EvRenderContext *rc)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	char *retval;
+	EvDocumentClass *klass = EV_DOCUMENT_GET_CLASS (document);
 
-	LOG ("ev_document_get_text");
-	retval = iface->get_text (document, page, rect);
+	return klass->render (document, rc);
+}
 
-	return retval;
+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_has_attachments (EvDocument *document)
+ev_document_is_page_size_uniform (EvDocument *document)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), TRUE);
 
-	if (iface->has_attachments == NULL)
-		return FALSE;
-	
-	return iface->has_attachments (document);
+	return document->priv->uniform;
 }
 
-GList *
-ev_document_get_attachments (EvDocument *document)
+void
+ev_document_get_max_page_size (EvDocument *document,
+			       gdouble    *width,
+			       gdouble    *height)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	GList *retval;
+	g_return_if_fail (EV_IS_DOCUMENT (document));
 
-	LOG ("ev_document_get_attachments");
-	if (iface->get_attachments == NULL)
-		return NULL;
-	retval = iface->get_attachments (document);
+	if (width)
+		*width = document->priv->max_width;
+	if (height)
+		*height = document->priv->max_height;
+}
 
-	return retval;
+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);
 }
 
-GdkPixbuf *
-ev_document_render_pixbuf (EvDocument      *document,
-			   EvRenderContext *rc)
+gint
+ev_document_get_max_label_len (EvDocument *document)
 {
-	EvDocumentIface *iface = EV_DOCUMENT_GET_IFACE (document);
-	GdkPixbuf *retval;
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), -1);
 
-	LOG ("ev_document_render_pixbuf");
-	g_assert (iface->render_pixbuf);
+	return document->priv->max_label;
+}
 
-	retval = iface->render_pixbuf (document, rc);
+gboolean
+ev_document_has_text_page_labels (EvDocument *document)
+{
+	g_return_val_if_fail (EV_IS_DOCUMENT (document), FALSE);
 
-	return retval;
+	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 */
+EV_DEFINE_BOXED_TYPE (EvDocumentInfo, ev_document_info, ev_document_info_copy, ev_document_info_free)
+
+EvDocumentInfo *
+ev_document_info_copy (EvDocumentInfo *info)
+{
+	EvDocumentInfo *copy;
+	
+	g_return_val_if_fail (info != NULL, NULL);
+
+	copy = g_new0 (EvDocumentInfo, 1);
+	copy->title = g_strdup (info->title);
+	copy->format = g_strdup (info->format);
+	copy->author = g_strdup (info->author);
+	copy->subject = g_strdup (info->subject);
+	copy->keywords = g_strdup (info->keywords);
+	copy->security = g_strdup (info->security);
+	copy->creator = g_strdup (info->creator);
+	copy->producer = g_strdup (info->producer);
+	copy->linearized = g_strdup (info->linearized);
+	
+	copy->creation_date = info->creation_date;
+	copy->modified_date = info->modified_date;
+	copy->layout = info->layout;
+	copy->mode = info->mode;
+	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;
 }
 
 void
@@ -256,11 +596,102 @@ ev_document_info_free (EvDocumentInfo *info)
 	g_free (info->author);
 	g_free (info->subject);
 	g_free (info->keywords);
+	g_free (info->creator);
+	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)
+
+EvRectangle *
+ev_rectangle_new (void)
+{
+	return g_new0 (EvRectangle, 1);
+}
+
+EvRectangle *
+ev_rectangle_copy (EvRectangle *rectangle)
+{
+	EvRectangle *new_rectangle;
+
+	g_return_val_if_fail (rectangle != NULL, NULL);
+
+	new_rectangle = g_new (EvRectangle, 1);
+	*new_rectangle = *rectangle;
+
+	return new_rectangle;
+}
+
+void
+ev_rectangle_free (EvRectangle *rectangle)
+{
+	g_free (rectangle);
+}
 
 /* Compares two rects.  returns 0 if they're equal */
 #define EPSILON 0.0000001