Attachment 42440 Details for Bug 33269 – Get text attributes in glib

[patch] Get text attributes in glib

0001-glib-added-get_text_attributes.patch (text/plain), 5.57 KB, created by Daniel Garcia on 2011-01-25 02:01:12 UTC

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Creator: Daniel Garcia

Created: 2011-01-25 02:01:12 UTC

Size: 5.57 KB

patch

obsolete

>From 0d35f3759707c689c6474a8888c288752556c92b 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/poppler-page.cc                |  112 +++++++++++++++++++++++++++++++++++
> glib/poppler-page.h                 |    3 +
> glib/reference/poppler-sections.txt |    1 +
> 3 files changed, 116 insertions(+), 0 deletions(-)
>
>diff --git a/glib/poppler-page.cc b/glib/poppler-page.cc
>index 064e4af..d0fc218 100644
>--- a/glib/poppler-page.cc
>+++ b/glib/poppler-page.cc
>@@ -2203,3 +2203,115 @@ poppler_page_get_text_layout (PopplerPage       *page,
> 
>   return TRUE;
> }
>+
>+/**
>+ * poppler_page_get_text_attributes:
>+ * @page: A #PopplerPage
>+ * @attributes: (out) (array length=n_attributes) (transfer container): return location for an array of #PangoAttrList
>+ * @n_attributes: length of returned array
>+ *
>+ * Obtains the attributes of the text as a list of #PangoAttrList
>+ * Each array element must be freed with pango_attr_list_unref () when done.
>+ * And the array must be freed with g_free ()
>+ *
>+ * The position in the array represents an offset in the text returned by
>+ * poppler_page_get_text ()
>+ *
>+ * Return value: %TRUE if the page contains text, %FALSE otherwise
>+ *
>+ * Since: 0.16
>+ **/
>+gboolean
>+poppler_page_get_text_attributes  (PopplerPage     *page,
>+                                   PangoAttrList ***attributes,
>+                                   guint           *n_attributes)
>+{
>+  TextPage *text;
>+  TextWordList *wordlist;
>+  TextWord *word;
>+  PangoAttrList *attr_list;
>+  gchar *fontname;
>+  gboolean subset = FALSE;
>+  gint i, j, offset = 0;
>+
>+  g_return_val_if_fail (POPPLER_IS_PAGE (page), FALSE);
>+
>+  *n_attributes = 0;
>+
>+  text = poppler_page_get_text_page (page);
>+  wordlist = text->makeWordList (gFalse);
>+
>+  if (wordlist->getLength () <= 0)
>+    {
>+      delete wordlist;
>+      return FALSE;
>+    }
>+
>+  // Getting the array size
>+  for (i = 0; i < wordlist->getLength (); i++)
>+    {
>+      word = wordlist->get (i);
>+      *n_attributes += word->getLength () + 1;
>+    }
>+
>+  *attributes = (PangoAttrList**) g_malloc (sizeof (PangoAttrList*) * (*n_attributes));
>+
>+  // Calculating each word attributes
>+  for (i = 0; i < wordlist->getLength (); i++)
>+    {
>+      word = wordlist->get (i);
>+      fontname = word->getFontName()->getCString();
>+      gdouble r, g, b;
>+      PangoAttribute *font_attr, *size_attr, *underline_attr, *color_attr;
>+
>+      // 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
>+      font_attr = pango_attr_family_new (fontname);
>+      size_attr = pango_attr_size_new ((int)word->getFontSize());
>+      underline_attr = pango_attr_underline_new (word->isUnderlined() ? PANGO_UNDERLINE_SINGLE : PANGO_UNDERLINE_NONE);
>+      word->getColor (&r, &g, &b);
>+      color_attr = pango_attr_foreground_new ((int)(r * 65535), (int)(g * 65535), (int)(b * 65535));
>+
>+      // each char of the word has the same attributes
>+      for (j = 0; j < word->getLength (); j++)
>+        {
>+          (*attributes)[offset] = pango_attr_list_new ();
>+          attr_list = (*attributes)[offset];
>+          offset++;
>+
>+          pango_attr_list_insert (attr_list, pango_attribute_copy (font_attr));
>+          pango_attr_list_insert (attr_list, pango_attribute_copy (size_attr));
>+          pango_attr_list_insert (attr_list, pango_attribute_copy (underline_attr));
>+          pango_attr_list_insert (attr_list, pango_attribute_copy (color_attr));
>+        }
>+
>+      pango_attribute_destroy (font_attr);
>+      pango_attribute_destroy (size_attr);
>+      pango_attribute_destroy (underline_attr);
>+      pango_attribute_destroy (color_attr);
>+
>+      // space or breakline
>+      (*attributes)[offset] = pango_attr_list_new ();
>+      offset++;
>+    }
>+
>+  delete wordlist;
>+
>+  return TRUE;
>+}
>diff --git a/glib/poppler-page.h b/glib/poppler-page.h
>index d40c0ee..f662b15 100644
>--- a/glib/poppler-page.h
>+++ b/glib/poppler-page.h
>@@ -128,6 +128,9 @@ void 		      poppler_page_get_crop_box 	 (PopplerPage        *page,
> gboolean               poppler_page_get_text_layout      (PopplerPage        *page,
>                                                           PopplerRectangle  **rectangles,
>                                                           guint              *n_rectangles);
>+gboolean               poppler_page_get_text_attributes  (PopplerPage        *page,
>+                                                          PangoAttrList    ***attributes,
>+                                                          guint              *n_attributes);
> 
> /* A rectangle on a page, with coordinates in PDF points. */
> #define POPPLER_TYPE_RECTANGLE             (poppler_rectangle_get_type ())
>diff --git a/glib/reference/poppler-sections.txt b/glib/reference/poppler-sections.txt
>index 6ad9ee2..14521e5 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
>-- 
>1.7.4.rc2.258.g844d7
>

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