textview: Move text attributes code into its own .c file

1 files changed, 348 insertions, 0 deletions

diff --git a/gtk/gtktextattributes.c b/gtk/gtktextattributes.c
new file mode 100644
index 0000000000..d2a9c6c3d5
--- /dev/null
+++ b/gtk/gtktextattributes.c
@@ -0,0 +1,348 @@
+/* gtktextattributes.c - text attributes
+ *
+ * Copyright (c) 1992-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright (c) 2000      Red Hat, Inc.
+ * Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
+ *
+ * This software is copyrighted by the Regents of the University of
+ * California, Sun Microsystems, Inc., and other parties.  The
+ * following terms apply to all files associated with the software
+ * unless explicitly disclaimed in individual files.
+ *
+ * The authors hereby grant permission to use, copy, modify,
+ * distribute, and license this software and its documentation for any
+ * purpose, provided that existing copyright notices are retained in
+ * all copies and that this notice is included verbatim in any
+ * distributions. No written agreement, license, or royalty fee is
+ * required for any of the authorized uses.  Modifications to this
+ * software may be copyrighted by their authors and need not follow
+ * the licensing terms described here, provided that the new terms are
+ * clearly indicated on the first page of each file where they apply.
+ *
+ * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
+ * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+ * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
+ * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
+ * NON-INFRINGEMENT.  THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
+ * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
+ * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * GOVERNMENT USE: If you are acquiring this software on behalf of the
+ * U.S. government, the Government shall have only "Restricted Rights"
+ * in the software and related documentation as defined in the Federal
+ * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2).  If you
+ * are acquiring the software on behalf of the Department of Defense,
+ * the software shall be classified as "Commercial Computer Software"
+ * and the Government shall have only "Restricted Rights" as defined
+ * in Clause 252.227-7013 (c) (1) of DFARs.  Notwithstanding the
+ * foregoing, the authors grant the U.S. Government and others acting
+ * in its behalf permission to use and distribute the software in
+ * accordance with the terms specified in this license.
+ *
+ */
+
+#include "config.h"
+
+#include "gtktextattributes.h"
+
+#include "gtkmainprivate.h"
+#include "gtktexttag.h"
+#include "gtktexttypes.h"
+
+/**
+ * gtk_text_attributes_new:
+ * 
+ * Creates a #GtkTextAttributes, which describes
+ * a set of properties on some text.
+ * 
+ * Return value: a new #GtkTextAttributes
+ **/
+GtkTextAttributes*
+gtk_text_attributes_new (void)
+{
+  GtkTextAttributes *values;
+
+  values = g_new0 (GtkTextAttributes, 1);
+
+  /* 0 is a valid value for most of the struct */
+
+  values->refcount = 1;
+
+  values->language = gtk_get_default_language ();
+
+  values->font_scale = 1.0;
+
+  values->editable = TRUE;
+      
+  return values;
+}
+
+/**
+ * gtk_text_attributes_copy:
+ * @src: a #GtkTextAttributes to be copied
+ * 
+ * Copies @src and returns a new #GtkTextAttributes.
+ * 
+ * Return value: a copy of @src
+ **/
+GtkTextAttributes*
+gtk_text_attributes_copy (GtkTextAttributes *src)
+{
+  GtkTextAttributes *dest;
+
+  dest = gtk_text_attributes_new ();
+  gtk_text_attributes_copy_values (src, dest);
+
+  return dest;
+}
+
+G_DEFINE_BOXED_TYPE (GtkTextAttributes, gtk_text_attributes,
+                     gtk_text_attributes_ref,
+                     gtk_text_attributes_unref)
+
+/**
+ * gtk_text_attributes_copy_values:
+ * @src: a #GtkTextAttributes
+ * @dest: another #GtkTextAttributes
+ * 
+ * Copies the values from @src to @dest so that @dest has the same values
+ * as @src. Frees existing values in @dest.
+ **/
+void
+gtk_text_attributes_copy_values (GtkTextAttributes *src,
+                                 GtkTextAttributes *dest)
+{
+  guint orig_refcount;
+
+  if (src == dest)
+    return;
+
+  /* Remove refs */
+
+  if (dest->font)
+    pango_font_description_free (dest->font);
+  
+  /* Copy */
+  orig_refcount = dest->refcount;
+
+  *dest = *src;
+
+  if (src->tabs)
+    dest->tabs = pango_tab_array_copy (src->tabs);
+
+  dest->language = src->language;
+
+  if (dest->font)
+    dest->font = pango_font_description_copy (src->font);
+  
+  if (src->pg_bg_color)
+    dest->pg_bg_color = gdk_color_copy (src->pg_bg_color);
+
+  dest->refcount = orig_refcount;
+}
+
+/**
+ * gtk_text_attributes_ref:
+ * @values: a #GtkTextAttributes
+ * 
+ * Increments the reference count on @values.
+ *
+ * Returns: the #GtkTextAttributes that were passed in
+ **/
+GtkTextAttributes *
+gtk_text_attributes_ref (GtkTextAttributes *values)
+{
+  g_return_val_if_fail (values != NULL, NULL);
+
+  values->refcount += 1;
+
+  return values;
+}
+
+/**
+ * gtk_text_attributes_unref:
+ * @values: a #GtkTextAttributes
+ * 
+ * Decrements the reference count on @values, freeing the structure
+ * if the reference count reaches 0.
+ **/
+void
+gtk_text_attributes_unref (GtkTextAttributes *values)
+{
+  g_return_if_fail (values != NULL);
+  g_return_if_fail (values->refcount > 0);
+
+  values->refcount -= 1;
+
+  if (values->refcount == 0)
+    {
+      if (values->tabs)
+        pango_tab_array_free (values->tabs);
+
+      if (values->font)
+	pango_font_description_free (values->font);
+
+      if (values->pg_bg_color)
+	gdk_color_free (values->pg_bg_color);
+
+      g_free (values);
+    }
+}
+
+void
+_gtk_text_attributes_fill_from_tags (GtkTextAttributes *dest,
+                                     GtkTextTag**       tags,
+                                     guint              n_tags)
+{
+  guint n = 0;
+
+  guint left_margin_accumulative = 0;
+  guint right_margin_accumulative = 0;
+
+  while (n < n_tags)
+    {
+      GtkTextTag *tag = tags[n];
+      GtkTextAttributes *vals = tag->priv->values;
+
+      g_assert (tag->priv->table != NULL);
+      if (n > 0)
+        g_assert (tags[n]->priv->priority > tags[n-1]->priv->priority);
+
+      if (tag->priv->bg_color_set)
+        {
+          dest->appearance.bg_color = vals->appearance.bg_color;
+
+          dest->appearance.draw_bg = TRUE;
+        }
+      if (tag->priv->fg_color_set)
+        dest->appearance.fg_color = vals->appearance.fg_color;
+
+      if (tag->priv->pg_bg_color_set)
+        {
+          dest->pg_bg_color = gdk_color_copy (vals->pg_bg_color);
+        }
+
+      if (vals->font)
+	{
+	  if (dest->font)
+	    pango_font_description_merge (dest->font, vals->font, TRUE);
+	  else
+	    dest->font = pango_font_description_copy (vals->font);
+	}
+
+      /* multiply all the scales together to get a composite */
+      if (tag->priv->scale_set)
+        dest->font_scale *= vals->font_scale;
+
+      if (tag->priv->justification_set)
+        dest->justification = vals->justification;
+
+      if (vals->direction != GTK_TEXT_DIR_NONE)
+        dest->direction = vals->direction;
+
+      if (tag->priv->left_margin_set)
+        {
+          if (tag->priv->accumulative_margin)
+            left_margin_accumulative += vals->left_margin;
+          else
+            dest->left_margin = vals->left_margin;
+        }
+
+      if (tag->priv->indent_set)
+        dest->indent = vals->indent;
+
+      if (tag->priv->rise_set)
+        dest->appearance.rise = vals->appearance.rise;
+
+      if (tag->priv->right_margin_set)
+        {
+          if (tag->priv->accumulative_margin)
+            right_margin_accumulative += vals->right_margin;
+          else
+            dest->right_margin = vals->right_margin;
+        }
+
+      if (tag->priv->pixels_above_lines_set)
+        dest->pixels_above_lines = vals->pixels_above_lines;
+
+      if (tag->priv->pixels_below_lines_set)
+        dest->pixels_below_lines = vals->pixels_below_lines;
+
+      if (tag->priv->pixels_inside_wrap_set)
+        dest->pixels_inside_wrap = vals->pixels_inside_wrap;
+
+      if (tag->priv->tabs_set)
+        {
+          if (dest->tabs)
+            pango_tab_array_free (dest->tabs);
+          dest->tabs = pango_tab_array_copy (vals->tabs);
+        }
+
+      if (tag->priv->wrap_mode_set)
+        dest->wrap_mode = vals->wrap_mode;
+
+      if (tag->priv->underline_set)
+        dest->appearance.underline = vals->appearance.underline;
+
+      if (tag->priv->strikethrough_set)
+        dest->appearance.strikethrough = vals->appearance.strikethrough;
+
+      if (tag->priv->invisible_set)
+        dest->invisible = vals->invisible;
+
+      if (tag->priv->editable_set)
+        dest->editable = vals->editable;
+
+      if (tag->priv->bg_full_height_set)
+        dest->bg_full_height = vals->bg_full_height;
+
+      if (tag->priv->language_set)
+	dest->language = vals->language;
+
+      ++n;
+    }
+
+  dest->left_margin += left_margin_accumulative;
+  dest->right_margin += right_margin_accumulative;
+}
+
+gboolean
+_gtk_text_tag_affects_size (GtkTextTag *tag)
+{
+  GtkTextTagPrivate *priv = tag->priv;
+
+  return
+    (priv->values->font && pango_font_description_get_set_fields (priv->values->font) != 0) ||
+    priv->scale_set ||
+    priv->justification_set ||
+    priv->left_margin_set ||
+    priv->indent_set ||
+    priv->rise_set ||
+    priv->right_margin_set ||
+    priv->pixels_above_lines_set ||
+    priv->pixels_below_lines_set ||
+    priv->pixels_inside_wrap_set ||
+    priv->tabs_set ||
+    priv->underline_set ||
+    priv->wrap_mode_set ||
+    priv->invisible_set;
+}
+
+gboolean
+_gtk_text_tag_affects_nonsize_appearance (GtkTextTag *tag)
+{
+  GtkTextTagPrivate *priv = tag->priv;
+
+  return
+    priv->bg_color_set ||
+    priv->fg_color_set ||
+    priv->strikethrough_set ||
+    priv->bg_full_height_set ||
+    priv->pg_bg_color_set;
+}