[gtk/new-pango-attributes: 2/2] textview: Implement new pango attributes

[Matthias Clasen <matthiasc src gnome org>]

commit 257c9a524670879eb04a5035cb1058780e5086fa
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Aug 24 12:47:12 2021 -0400

    textview: Implement new pango attributes
    
    Implement the word and sentence attributes.

 demos/gtk-demo/fontify.c | 21 +++++++++++++
 gtk/gtktextattributes.c  |  6 ++++
 gtk/gtktextattributes.h  |  2 ++
 gtk/gtktextbuffer.c      | 22 ++++++++++++-
 gtk/gtktextlayout.c      | 18 +++++++++++
 gtk/gtktexttag.c         | 82 ++++++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtktexttagprivate.h  |  2 ++
 7 files changed, 152 insertions(+), 1 deletion(-)
---
diff --git a/demos/gtk-demo/fontify.c b/demos/gtk-demo/fontify.c
index b39c3ffee6..34b5063b46 100644
--- a/demos/gtk-demo/fontify.c
+++ b/demos/gtk-demo/fontify.c
@@ -131,6 +131,19 @@ insert_tags_for_attributes (GtkTextBuffer     *buffer,
       gtk_text_buffer_apply_tag (buffer, tag, start, end); \
     }
 
+#define VOID_ATTR(attr_name) \
+    { \
+      tag = gtk_text_tag_table_lookup (table, #attr_name); \
+      if (!tag) \
+        { \
+          tag = gtk_text_tag_new (#attr_name); \
+          g_object_set (tag, #attr_name, TRUE, NULL); \
+          gtk_text_tag_table_add (table, tag); \
+          g_object_unref (tag); \
+        } \
+      gtk_text_buffer_apply_tag (buffer, tag, start, end); \
+    }
+
   fg_alpha = bg_alpha = 1.;
 
   attrs = pango_attr_iterator_get_attrs (iter);
@@ -262,6 +275,14 @@ insert_tags_for_attributes (GtkTextBuffer     *buffer,
         case PANGO_ATTR_ABSOLUTE_LINE_HEIGHT:
           break;
 
+        case PANGO_ATTR_WORD:
+          VOID_ATTR (word);
+          break;
+
+        case PANGO_ATTR_SENTENCE:
+          VOID_ATTR (sentence);
+          break;
+
         case PANGO_ATTR_SHAPE:
         case PANGO_ATTR_ABSOLUTE_SIZE:
         case PANGO_ATTR_GRAVITY:
diff --git a/gtk/gtktextattributes.c b/gtk/gtktextattributes.c
index 87208a8100..856b4f3310 100644
--- a/gtk/gtktextattributes.c
+++ b/gtk/gtktextattributes.c
@@ -441,6 +441,12 @@ _gtk_text_attributes_fill_from_tags (GtkTextAttributes *dest,
 
       if (tag->priv->text_transform_set)
         dest->text_transform = vals->text_transform;
+
+      if (tag->priv->word_set)
+        dest->word = vals->word;
+
+      if (tag->priv->sentence_set)
+        dest->sentence = vals->sentence;
     }
 
   dest->left_margin += left_margin_accumulative;
diff --git a/gtk/gtktextattributes.h b/gtk/gtktextattributes.h
index f1ebc857db..3aa01c8690 100644
--- a/gtk/gtktextattributes.h
+++ b/gtk/gtktextattributes.h
@@ -160,6 +160,8 @@ struct _GtkTextAttributes
   guint no_hyphens : 1;
   guint line_height_is_absolute : 1;
   guint text_transform : 3; /* PangoTextTransform */
+  guint word : 1;
+  guint sentence : 1;
 };
 
 GtkTextAttributes* gtk_text_attributes_new         (void);
diff --git a/gtk/gtktextbuffer.c b/gtk/gtktextbuffer.c
index fd457df699..67d1e47056 100644
--- a/gtk/gtktextbuffer.c
+++ b/gtk/gtktextbuffer.c
@@ -4581,8 +4581,20 @@ insert_tags_for_attributes (GtkTextBuffer     *buffer,
       gtk_text_buffer_apply_tag (buffer, tag, start, end); \
     }
 
-  fg_alpha = bg_alpha = 1.;
+#define VOID_ATTR(attr_name) \
+    { \
+      tag = gtk_text_tag_table_lookup (table, #attr_name); \
+      if (!tag) \
+        { \
+          tag = gtk_text_tag_new (#attr_name); \
+          g_object_set (tag, #attr_name, TRUE, NULL); \
+          gtk_text_tag_table_add (table, tag); \
+          g_object_unref (tag); \
+        } \
+      gtk_text_buffer_apply_tag (buffer, tag, start, end); \
+    }
 
+  fg_alpha = bg_alpha = 1.;
   attrs = pango_attr_iterator_get_attrs (iter);
   for (l = attrs; l; l = l->next)
     {
@@ -4716,6 +4728,14 @@ insert_tags_for_attributes (GtkTextBuffer     *buffer,
           INT_ATTR (text_transform);
           break;
 
+        case PANGO_ATTR_WORD:
+          VOID_ATTR (word);
+          break;
+
+        case PANGO_ATTR_SENTENCE:
+          VOID_ATTR (sentence);
+          break;
+
         case PANGO_ATTR_SHAPE:
         case PANGO_ATTR_ABSOLUTE_SIZE:
         case PANGO_ATTR_GRAVITY:
diff --git a/gtk/gtktextlayout.c b/gtk/gtktextlayout.c
index 88d4c409b4..1873b03d74 100644
--- a/gtk/gtktextlayout.c
+++ b/gtk/gtktextlayout.c
@@ -1692,6 +1692,24 @@ add_text_attrs (GtkTextLayout      *layout,
       attr->start_index = start;
       attr->end_index = start + byte_count;
 
+      pango_attr_list_insert (attrs, attr);
+    }
+
+  if (style->word)
+    {
+      attr = pango_attr_word_new ();
+      attr->start_index = start;
+      attr->end_index = start + byte_count;
+
+      pango_attr_list_insert (attrs, attr);
+    }
+
+  if (style->sentence)
+    {
+      attr = pango_attr_sentence_new ();
+      attr->start_index = start;
+      attr->end_index = start + byte_count;
+
       pango_attr_list_insert (attrs, attr);
     }
 }
diff --git a/gtk/gtktexttag.c b/gtk/gtktexttag.c
index f998ad9a40..8b252fb725 100644
--- a/gtk/gtktexttag.c
+++ b/gtk/gtktexttag.c
@@ -135,6 +135,8 @@ enum {
   PROP_SHOW_SPACES,
   PROP_INSERT_HYPHENS,
   PROP_TEXT_TRANSFORM,
+  PROP_WORD,
+  PROP_SENTENCE,
 
   /* Behavior args */
   PROP_ACCUMULATIVE_MARGIN,
@@ -178,6 +180,8 @@ enum {
   PROP_SHOW_SPACES_SET,
   PROP_INSERT_HYPHENS_SET,
   PROP_TEXT_TRANSFORM_SET,
+  PROP_WORD_SET,
+  PROP_SENTENCE_SET,
 
   LAST_ARG
 };
@@ -874,6 +878,40 @@ gtk_text_tag_class_init (GtkTextTagClass *klass)
                                                          PANGO_TEXT_TRANSFORM_NONE,
                                                          GTK_PARAM_READWRITE));
 
+  /**
+   * GtkTextTag:word:
+   *
+   * Whether this tag represents a single word.
+   *
+   * This affects line breaks and cursor movement.
+   *
+   * Since: 4.6
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_WORD,
+                                   g_param_spec_boolean ("word",
+                                                         P_("Word"),
+                                                         P_("Whether this is a word."),
+                                                         FALSE,
+                                                         GTK_PARAM_READWRITE));
+
+  /**
+   * GtkTextTag:sentence:
+   *
+   * Whether this tag represents a single sentence.
+   *
+   * This affects cursor movement.
+   *
+   * Since: 4.6
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_SENTENCE,
+                                   g_param_spec_boolean ("sentence",
+                                                         P_("Sentence"),
+                                                         P_("Whether this is a sentence."),
+                                                         FALSE,
+                                                         GTK_PARAM_READWRITE));
+
   /**
    * GtkTextTag:accumulative-margin:
    *
@@ -1056,6 +1094,14 @@ gtk_text_tag_class_init (GtkTextTagClass *klass)
   ADD_SET_PROP ("text-transform-set", PROP_TEXT_TRANSFORM_SET,
                 P_("Text transform set"),
                 P_("Whether this tag affects text transformation"));
+
+  ADD_SET_PROP ("word-set", PROP_WORD_SET,
+                P_("Word set"),
+                P_("Whether this tag represents a single word"));
+
+  ADD_SET_PROP ("sentence-set", PROP_WORD_SET,
+                P_("Sentence set"),
+                P_("Whether this tag represents a single sentence"));
 }
 
 static void
@@ -1811,6 +1857,18 @@ gtk_text_tag_set_property (GObject      *object,
       g_object_notify (object, "text-transform-set");
       break;
 
+    case PROP_WORD:
+      priv->word_set = TRUE;
+      priv->values->word = g_value_get_boolean (value);
+      g_object_notify (object, "word-set");
+      break;
+
+    case PROP_SENTENCE:
+      priv->sentence_set = TRUE;
+      priv->values->sentence = g_value_get_boolean (value);
+      g_object_notify (object, "sentence-set");
+      break;
+
     case PROP_ACCUMULATIVE_MARGIN:
       priv->accumulative_margin = g_value_get_boolean (value);
       g_object_notify (object, "accumulative-margin");
@@ -1979,6 +2037,14 @@ gtk_text_tag_set_property (GObject      *object,
       priv->text_transform_set = g_value_get_boolean (value);
       break;
 
+    case PROP_WORD_SET:
+      priv->word_set = g_value_get_boolean (value);
+      break;
+
+    case PROP_SENTENCE_SET:
+      priv->sentence_set = g_value_get_boolean (value);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -2195,6 +2261,14 @@ gtk_text_tag_get_property (GObject      *object,
       g_value_set_enum (value, priv->values->text_transform);
       break;
 
+    case PROP_WORD:
+      g_value_set_boolean (value, priv->values->word);
+      break;
+
+    case PROP_SENTENCE:
+      g_value_set_boolean (value, priv->values->sentence);
+      break;
+
     case PROP_ACCUMULATIVE_MARGIN:
       g_value_set_boolean (value, priv->accumulative_margin);
       break;
@@ -2341,6 +2415,14 @@ gtk_text_tag_get_property (GObject      *object,
       g_value_set_boolean (value, priv->text_transform_set);
       break;
 
+    case PROP_WORD_SET:
+      g_value_set_boolean (value, priv->word_set);
+      break;
+
+    case PROP_SENTENCE_SET:
+      g_value_set_boolean (value, priv->sentence_set);
+      break;
+
     case PROP_BACKGROUND:
     case PROP_FOREGROUND:
     case PROP_PARAGRAPH_BACKGROUND:
diff --git a/gtk/gtktexttagprivate.h b/gtk/gtktexttagprivate.h
index ee6a5fa591..57ce42c2c6 100644
--- a/gtk/gtktexttagprivate.h
+++ b/gtk/gtktexttagprivate.h
@@ -88,6 +88,8 @@ struct _GtkTextTagPrivate
   guint show_spaces_set : 1;
   guint insert_hyphens_set : 1;
   guint text_transform_set : 1;
+  guint word_set : 1;
+  guint sentence_set : 1;
 
   /* Whether these margins accumulate or override */
   guint accumulative_margin : 1;