Attachment 50405 Details for Bug 33269 – Adds get text attributes function to poppler glib

[patch] Adds get text attributes function to poppler glib

0001-glib-Added-get-text-attributes.patch (text/plain), 11.90 KB, created by Daniel Garcia on 2011-08-20 11:08:33 UTC

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Creator: Daniel Garcia

Created: 2011-08-20 11:08:33 UTC

Size: 11.90 KB

patch

obsolete

>From 53554b4e5a8380ce85912845aa70e868cbd88bb3 Mon Sep 17 00:00:00 2001
>From: danigm <danigm@wadobo.com>
>Date: Tue, 25 Jan 2011 10:28:12 +0100
>Subject: [PATCH] [glib] Added get text attributes
>
>---
> glib/demo/text.c                    |   47 ++++++++-
> glib/poppler-page.cc                |  197 +++++++++++++++++++++++++++++++++++
> glib/poppler-page.h                 |   32 ++++++
> glib/poppler.h                      |    1 +
> glib/reference/poppler-sections.txt |    1 +
> 5 files changed, 276 insertions(+), 2 deletions(-)
>
>diff --git a/glib/demo/text.c b/glib/demo/text.c
>index 54d140b..b1716b7 100644
>--- a/glib/demo/text.c
>+++ b/glib/demo/text.c
>@@ -37,6 +37,7 @@ typedef struct {
> 	GtkTextBuffer   *buffer;
>         GtkWidget       *treeview;
> 	GtkListStore    *model;
>+	GtkLabel        *textinfo;
> 
> 	gint             page;
> } PgdTextDemo;
>@@ -152,6 +153,11 @@ pgd_text_selection_changed (GtkTreeSelection *treeselection,
> 	GtkTreeModel *model;
> 	GtkTreeIter   iter;
> 
>+	PopplerPage *page;
>+	GList       *text_info_list, *elem;
>+	PopplerTextInfo *text_info;
>+	gchar text_info_str[500];
>+
> 	if (gtk_tree_selection_get_selected (treeselection, &model, &iter)) {
> 		gpointer    offset;
> 		GtkTextIter begin_iter, end_iter;
>@@ -164,6 +170,34 @@ pgd_text_selection_changed (GtkTreeSelection *treeselection,
> 		end_iter = begin_iter;
> 		gtk_text_iter_forward_char (&end_iter);
> 		gtk_text_buffer_select_range (demo->buffer, &begin_iter, &end_iter);
>+
>+		// getting text info
>+		page = poppler_document_get_page (demo->doc, demo->page);
>+		text_info_list = poppler_page_get_text_attributes (page);
>+		for(elem = text_info_list; elem; elem = elem->next) {
>+			text_info = elem->data;
>+			if (GPOINTER_TO_INT (offset) >= text_info->start &&
>+			    GPOINTER_TO_INT (offset) <= text_info->end) {
>+				break;
>+			} else {
>+				text_info = NULL;
>+			}
>+		}
>+
>+		if (!text_info)
>+			return;
>+
>+		g_snprintf (text_info_str, 500, "Font: %s\n"
>+						"Size: %d\n"
>+						"Underline: %s\n"
>+						"Color RGB: %d, %d, %d\n",
>+					text_info->font,
>+					text_info->size,
>+					text_info->underline ? "True" : "False",
>+					text_info->color->red,
>+					text_info->color->green,
>+					text_info->color->blue);
>+		gtk_label_set_text (demo->textinfo, text_info_str);
> 	}
> }
> 
>@@ -232,7 +266,8 @@ pgd_text_create_widget (PopplerDocument *document)
> {
> 	PgdTextDemo      *demo;
> 	GtkWidget        *label;
>-	GtkWidget        *vbox;
>+	GtkWidget        *vbox, *vbox2;
>+	GtkWidget	 *textinfo;
> 	GtkWidget        *hbox, *page_selector;
> 	GtkWidget        *button;
> 	GtkWidget        *swindow, *textview, *treeview;
>@@ -249,6 +284,8 @@ pgd_text_create_widget (PopplerDocument *document)
> 	n_pages = poppler_document_get_n_pages (document);
> 
> 	vbox = gtk_vbox_new (FALSE, 12);
>+	vbox2 = gtk_vbox_new (FALSE, 12);
>+	textinfo = gtk_label_new ("TextInfo");
> 
> 	hbox = gtk_hbox_new (FALSE, 6);
> 
>@@ -341,9 +378,15 @@ pgd_text_create_widget (PopplerDocument *document)
> 	gtk_container_add (GTK_CONTAINER (swindow), treeview);
> 	gtk_widget_show (treeview);
> 
>-	gtk_paned_add1 (GTK_PANED (hpaned), swindow);
>+	gtk_container_add (GTK_CONTAINER (vbox2), swindow);
>+	gtk_box_pack_start (GTK_BOX (vbox2), textinfo, FALSE, FALSE, 12);
>+	gtk_paned_add1 (GTK_PANED (hpaned), vbox2);
>+	gtk_widget_show (vbox2);
>+	gtk_widget_show (textinfo);
> 	gtk_widget_show (swindow);
> 
>+	demo->textinfo = GTK_LABEL (textinfo);
>+
> 	swindow = gtk_scrolled_window_new (NULL, NULL);
> 	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
> 					GTK_POLICY_AUTOMATIC,
>diff --git a/glib/poppler-page.cc b/glib/poppler-page.cc
>index d1f1bcf..d00f4ba 100644
>--- a/glib/poppler-page.cc
>+++ b/glib/poppler-page.cc
>@@ -1479,6 +1479,120 @@ poppler_rectangle_free (PopplerRectangle *rectangle)
>   g_slice_free (PopplerRectangle, rectangle);
> }
> 
>+/* PopplerTextInfo type */
>+
>+POPPLER_DEFINE_BOXED_TYPE (PopplerTextInfo, poppler_text_info,
>+			   poppler_text_info_copy,
>+			   poppler_text_info_free)
>+
>+/**
>+ * poppler_text_info_new:
>+ *
>+ * Creates a new #PopplerTextInfo
>+ *
>+ * Returns: a new #PopplerTextInfo with
>+ * poppler_text_info_free() to free it
>+ */
>+PopplerTextInfo *
>+poppler_text_info_new (void)
>+{
>+  PopplerTextInfo *tinfo = g_slice_new0 (PopplerTextInfo);
>+  tinfo->color = poppler_color_new ();
>+  return tinfo;
>+}
>+
>+/*
>+ * Allocates a new PopplerTextInfo with word attributes
>+ */
>+static PopplerTextInfo *
>+poppler_text_info_new_from_word (TextWord *word)
>+{
>+  gchar *fontname;
>+  gboolean subset = FALSE;
>+  gdouble r, g, b;
>+
>+  gint tsize;
>+  gboolean tunderline;
>+  gint tred, tgreen, tblue;
>+  GooString *font = NULL;
>+
>+  PopplerTextInfo *tinfo=NULL;
>+
>+  font = word->getFontName();
>+  fontname = font ? font->getCString() : (gchar*)"NO FONTNAME";
>+
>+  // check for a font subset name: capital letters followed by a '+' sign
>+  if (fontname) {
>+    gchar *tmpfontname = fontname;
>+    gint i;
>+    for (i=0; *(tmpfontname + i); i++) {
>+      if (*(tmpfontname + i) < 'A' || *(tmpfontname + i) > 'Z') {
>+        break;
>+      }
>+    }
>+    subset = i > 0 && *(tmpfontname + i) == '+';
>+  }
>+
>+  if (subset) {
>+    while (*fontname && *fontname != '+') fontname++;
>+    fontname++;
>+  }
>+
>+  // word attributes
>+  tsize = (int)(word->getFontSize());
>+  tunderline = word->isUnderlined();
>+  word->getColor (&r, &g, &b);
>+  tred = (int)(r * 65535);
>+  tgreen = (int)(g * 65535);
>+  tblue = (int)(b * 65535);
>+
>+  // word attributes
>+  tinfo = poppler_text_info_new ();
>+  tinfo->font = g_strdup (fontname);
>+  tinfo->size = tsize;
>+  tinfo->underline = tunderline;
>+  tinfo->color->red = tred;
>+  tinfo->color->green = tgreen;
>+  tinfo->color->blue = tblue;
>+
>+  return tinfo;
>+}
>+
>+/**
>+ * poppler_text_info_copy:
>+ * @textinfo: a #PopplerTextInfo to copy
>+ *
>+ * Creates a copy of @textinfo
>+ *
>+ * Returns: a new allocated copy of @textinfo
>+ */
>+PopplerTextInfo *
>+poppler_text_info_copy (PopplerTextInfo *textinfo)
>+{
>+  PopplerTextInfo *tinfo = NULL;
>+  g_return_val_if_fail (textinfo != NULL, NULL);
>+
>+  tinfo = g_slice_dup (PopplerTextInfo, textinfo);
>+  tinfo->color = poppler_color_copy (textinfo->color);
>+  tinfo->font = g_strdup (textinfo->font);
>+  return tinfo;
>+}
>+
>+/**
>+ * poppler_text_info_free:
>+ * @textinfo: a #PopplerTextInfo
>+ *
>+ * Frees the given #PopplerTextInfo
>+ */
>+void
>+poppler_text_info_free (PopplerTextInfo *textinfo)
>+{
>+  poppler_color_free (textinfo->color);
>+  if (textinfo->font)
>+    g_free (textinfo->font);
>+  g_slice_free (PopplerTextInfo, textinfo);
>+}
>+
> /* PopplerColor type */
> POPPLER_DEFINE_BOXED_TYPE (PopplerColor, poppler_color, poppler_color_copy, poppler_color_free)
> 
>@@ -1904,3 +2018,86 @@ poppler_page_get_text_layout (PopplerPage       *page,
> 
>   return TRUE;
> }
>+
>+/**
>+ * poppler_page_free_text_attributes;
>+ * @list: A list of #PopplerTextInfos
>+ *
>+ * Frees a list of #PopplerTextInfos allocated by
>+ * poppler_page_get_text_attributes().
>+ **/
>+void
>+poppler_page_free_text_attributes (GList *list)
>+{
>+  g_list_free_full (list, (GDestroyNotify)poppler_text_info_free);
>+}
>+
>+/**
>+ * poppler_page_get_text_attributes:
>+ * @page: A #PopplerPage
>+ *
>+ * Obtains the attributes of the text as a GList of #PopplerTextInfo
>+ *
>+ *  This list must be freed with poppler_page_free_text_attributes () when
>+ *  done.
>+ *
>+ * Return value: (element-type PopplerTextInfo) (transfer full): A #GList of #PopplerTextInfo
>+ *
>+ * Each list element is a textinfo with start and end indicates the
>+ * start and end indexes of the group with this textinfo attributes.
>+ * This indexes are the same returned by poppler_page_get_text ()
>+ *
>+ * Since: 0.18
>+ **/
>+GList *
>+poppler_page_get_text_attributes  (PopplerPage *page)
>+{
>+  TextPage *text;
>+  TextWordList *wordlist;
>+  TextWord *word;
>+  PopplerTextInfo *textinfo = 0, *textinfo2 = 0;
>+  gint i, offset = 0;
>+  GList *attributes = 0;
>+
>+  g_return_val_if_fail (POPPLER_IS_PAGE (page), NULL);
>+
>+  text = poppler_page_get_text_page (page);
>+  wordlist = text->makeWordList (gFalse);
>+
>+  if (wordlist->getLength () <= 0)
>+    {
>+      delete wordlist;
>+      return NULL;
>+    }
>+
>+  // Calculating each word attributes
>+  for (i = 0; i < wordlist->getLength (); i++)
>+    {
>+      word = wordlist->get (i);
>+
>+      // each char of the word has the same attributes
>+      textinfo2 = poppler_text_info_new_from_word (word);
>+      if (!textinfo ||
>+          strcmp (textinfo2->font, textinfo->font) ||
>+          textinfo2->size != textinfo->size ||
>+          textinfo2->underline != textinfo->underline ||
>+          textinfo2->color->red != textinfo->color->red ||
>+          textinfo2->color->green != textinfo->color->green ||
>+          textinfo2->color->blue != textinfo->color->blue)
>+       {
>+          if (textinfo)
>+                textinfo->end -= 1;
>+          textinfo = textinfo2;
>+          textinfo->start = offset;
>+          attributes = g_list_append (attributes, textinfo);
>+       } else {
>+          poppler_text_info_free (textinfo2);
>+       }
>+      offset += word->getLength () + 1;
>+      textinfo->end = offset;
>+    }
>+
>+  delete wordlist;
>+
>+  return attributes;
>+}
>diff --git a/glib/poppler-page.h b/glib/poppler-page.h
>index 03e22ec..833725d 100644
>--- a/glib/poppler-page.h
>+++ b/glib/poppler-page.h
>@@ -94,6 +94,8 @@ void 		      poppler_page_get_crop_box 	 (PopplerPage        *page,
> gboolean               poppler_page_get_text_layout      (PopplerPage        *page,
>                                                           PopplerRectangle  **rectangles,
>                                                           guint              *n_rectangles);
>+GList                 *poppler_page_get_text_attributes  (PopplerPage        *page);
>+void                   poppler_page_free_text_attributes (GArray             *array);
> 
> /* A rectangle on a page, with coordinates in PDF points. */
> #define POPPLER_TYPE_RECTANGLE             (poppler_rectangle_get_type ())
>@@ -120,6 +122,36 @@ PopplerRectangle *poppler_rectangle_new      (void);
> PopplerRectangle *poppler_rectangle_copy     (PopplerRectangle *rectangle);
> void              poppler_rectangle_free     (PopplerRectangle *rectangle);
> 
>+/* A textword attributes. */
>+#define POPPLER_TYPE_TEXT_INFO             (poppler_text_info_get_type ())
>+/**
>+ * PopplerTextInfo:
>+ * @font: word font name
>+ * @size: word font size
>+ * @uniderline: if word is underlined
>+ * @color: a #PopplerColor, the word foreground color
>+ * @start: start position for this text info
>+ * @end: end position for this text info
>+ *
>+ * A #PopplerTextInfo is used to describe
>+ * a word text attriutes
>+ */
>+struct _PopplerTextInfo
>+{
>+  gchar *font;
>+  gint size;
>+  gboolean underline;
>+  PopplerColor *color;
>+
>+  gint start;
>+  gint end;
>+};
>+
>+GType            poppler_text_info_get_type (void) G_GNUC_CONST;
>+PopplerTextInfo *poppler_text_info_new      (void);
>+PopplerTextInfo *poppler_text_info_copy     (PopplerTextInfo *textinfo);
>+void             poppler_text_info_free     (PopplerTextInfo *textinfo);
>+
> /* A color in RGB */
> #define POPPLER_TYPE_COLOR                 (poppler_color_get_type ())
> 
>diff --git a/glib/poppler.h b/glib/poppler.h
>index 008f5d8..b5574d2 100644
>--- a/glib/poppler.h
>+++ b/glib/poppler.h
>@@ -158,6 +158,7 @@ typedef struct _PopplerIndexIter           PopplerIndexIter;
> typedef struct _PopplerFontsIter           PopplerFontsIter;
> typedef struct _PopplerLayersIter          PopplerLayersIter;
> typedef struct _PopplerRectangle           PopplerRectangle;
>+typedef struct _PopplerTextInfo            PopplerTextInfo;
> typedef struct _PopplerColor               PopplerColor;
> typedef struct _PopplerLinkMapping         PopplerLinkMapping;
> typedef struct _PopplerPageTransition      PopplerPageTransition;
>diff --git a/glib/reference/poppler-sections.txt b/glib/reference/poppler-sections.txt
>index 9495052..dc170b6 100644
>--- a/glib/reference/poppler-sections.txt
>+++ b/glib/reference/poppler-sections.txt
>@@ -38,6 +38,7 @@ poppler_page_get_selected_text
> poppler_page_find_text
> poppler_page_get_text
> poppler_page_get_text_layout
>+poppler_page_get_text_attributes
> poppler_page_get_link_mapping
> poppler_page_free_link_mapping
> poppler_page_get_image_mapping
>-- 
>1.7.6
>

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