Commit 3d4bcf55 authored by Matthias Clasen's avatar Matthias Clasen

Allow inserting Pango markup in text buffers

This has been a very long-standing feature request.

https://bugzilla.gnome.org/show_bug.cgi?id=59390
parent d184088c
......@@ -3560,6 +3560,7 @@ gtk_text_buffer_insert_range
gtk_text_buffer_insert_range_interactive
gtk_text_buffer_insert_with_tags
gtk_text_buffer_insert_with_tags_by_name
gtk_text_buffer_insert_markup
gtk_text_buffer_delete
gtk_text_buffer_delete_interactive
gtk_text_buffer_backspace
......
......@@ -4720,3 +4720,182 @@ _gtk_text_buffer_get_text_after (GtkTextBuffer *buffer,
break;
}
}
static GtkTextTag *
get_tag_for_attributes (PangoAttrIterator *iter)
{
PangoAttribute *attr;
GtkTextTag *tag;
tag = gtk_text_tag_new (NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_LANGUAGE);
if (attr)
g_object_set (tag, "language", pango_language_to_string (((PangoAttrLanguage*)attr)->value), NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_FAMILY);
if (attr)
g_object_set (tag, "family", ((PangoAttrString*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_STYLE);
if (attr)
g_object_set (tag, "style", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_WEIGHT);
if (attr)
g_object_set (tag, "weight", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_VARIANT);
if (attr)
g_object_set (tag, "variant", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_STRETCH);
if (attr)
g_object_set (tag, "stretch", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_SIZE);
if (attr)
g_object_set (tag, "size", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_FONT_DESC);
if (attr)
g_object_set (tag, "font-desc", ((PangoAttrFontDesc*)attr)->desc, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_FOREGROUND);
if (attr)
{
PangoColor *color;
GdkRGBA rgba;
color = &((PangoAttrColor*)attr)->color;
rgba.red = color->red / 65535.;
rgba.green = color->green / 65535.;
rgba.blue = color->blue / 65535.;
rgba.alpha = 1.;
g_object_set (tag, "foreground-rgba", &rgba, NULL);
};
attr = pango_attr_iterator_get (iter, PANGO_ATTR_BACKGROUND);
if (attr)
{
PangoColor *color;
GdkRGBA rgba;
color = &((PangoAttrColor*)attr)->color;
rgba.red = color->red / 65535.;
rgba.green = color->green / 65535.;
rgba.blue = color->blue / 65535.;
rgba.alpha = 1.;
g_object_set (tag, "background-rgba", &rgba, NULL);
};
attr = pango_attr_iterator_get (iter, PANGO_ATTR_UNDERLINE);
if (attr)
g_object_set (tag, "underline", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_STRIKETHROUGH);
if (attr)
g_object_set (tag, "strikethrough", (gboolean) (((PangoAttrInt*)attr)->value != 0), NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_RISE);
if (attr)
g_object_set (tag, "rise", ((PangoAttrInt*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_SCALE);
if (attr)
g_object_set (tag, "scale", ((PangoAttrFloat*)attr)->value, NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_FALLBACK);
if (attr)
g_object_set (tag, "fallback", (gboolean) (((PangoAttrInt*)attr)->value != 0), NULL);
attr = pango_attr_iterator_get (iter, PANGO_ATTR_LETTER_SPACING);
if (attr)
g_object_set (tag, "letter-spacing", ((PangoAttrInt*)attr)->value, NULL);
return tag;
}
static void
gtk_text_buffer_insert_with_attributes (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
PangoAttrList *attributes)
{
GtkTextMark *mark;
PangoAttrIterator *attr;
GtkTextTagTable *tags;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (!attributes)
{
gtk_text_buffer_insert (buffer, iter, text, -1);
return;
}
/* create mark with right gravity */
mark = gtk_text_buffer_create_mark (buffer, NULL, iter, FALSE);
attr = pango_attr_list_get_iterator (attributes);
tags = gtk_text_buffer_get_tag_table (buffer);
do
{
GtkTextTag *tag;
gint start, end;
pango_attr_iterator_range (attr, &start, &end);
if (end == G_MAXINT) /* last chunk */
end = start - 1; /* resulting in -1 to be passed to _insert */
tag = get_tag_for_attributes (attr);
gtk_text_tag_table_add (tags, tag);
gtk_text_buffer_insert_with_tags (buffer, iter, text + start, end - start, tag, NULL);
gtk_text_buffer_get_iter_at_mark (buffer, iter, mark);
}
while (pango_attr_iterator_next (attr));
gtk_text_buffer_delete_mark (buffer, mark);
pango_attr_iterator_destroy (attr);
}
/**
* gtk_text_buffer_insert_markup:
* @buffer: a #GtkTextBuffer
* @iter: location to insert the markup
* @markup: a nul-terminated UTF-8 string containing [Pango markup][PangoMarkupFormat]
* @len: length of @markup in bytes, or -1
*
* Inserts the text in @markup at position @iter. @markup will be inserted
* in its entirety and must be nul-terminated and valid UTF-8. Emits the
* #GtkTextBuffer::insert-text signal, possibly multiple times; insertion
* actually occurs in the default handler for the signal. @iter will point
* to the end of the inserted text on return.
*
* Since: 3.16
*/
void
gtk_text_buffer_insert_markup (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *markup,
gint len)
{
PangoAttrList *attributes;
gchar *text;
GError *error = NULL;
if (!pango_parse_markup (markup, len, 0, &attributes, &text, NULL, &error))
{
g_warning ("Invalid markup string: %s", error->message);
g_error_free (error);
return;
}
gtk_text_buffer_insert_with_attributes (buffer, iter, text, attributes);
pango_attr_list_unref (attributes);
g_free (text);
}
......@@ -236,6 +236,12 @@ void gtk_text_buffer_insert_with_tags_by_name (GtkTextBuffer *buffer,
const gchar *first_tag_name,
...) G_GNUC_NULL_TERMINATED;
GDK_AVAILABLE_IN_3_16
void gtk_text_buffer_insert_markup (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *markup,
gint len);
/* Delete from the buffer */
GDK_AVAILABLE_IN_ALL
void gtk_text_buffer_delete (GtkTextBuffer *buffer,
......
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