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st-im-text: Support surrounding-text

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https://bugzilla.gnome.org/show_bug.cgi?id=683015
This commit is contained in:
Daiki Ueno 2012-08-30 12:25:55 +09:00 committed by Rui Matos
parent 85d993386a
commit 77ea16e18f
1 changed files with 47 additions and 16 deletions
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63
src/st/st-im-text.c
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@ -36,22 +36,6 @@
* ClutterIMText but using GtkIMContext rather than ClutterIMContext.
*/
/* Places where this actor doesn't support all of GtkIMContext:
*
* A) It doesn't support preedit. This makes it fairly useless for
* most complicated input methods. Fixing this requires support
* directly in ClutterText, since there is no way to wedge a
* preedit string in externally.
* B) It doesn't support surrounding context via the
* :retrieve-surrounding and :delete-surrounding signals. This could
* be added here, but only affects a small number of input methods
* and really doesn't make a lot of sense without A)
*
* Another problem that will show up with usage in GNOME Shell's overview
* is that the user may have trouble seeing and interacting with ancilliary
* windows shown by the IM.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
@ -151,6 +135,49 @@ st_im_text_preedit_changed_cb (GtkIMContext *context,
pango_attr_list_unref (preedit_attrs);
}
static gboolean
st_im_text_retrieve_surrounding_cb (GtkIMContext *context,
StIMText *imtext)
{
ClutterText *clutter_text = CLUTTER_TEXT (imtext);
ClutterTextBuffer *buffer;
const gchar *text;
gint cursor_pos;
buffer = clutter_text_get_buffer (clutter_text);
text = clutter_text_buffer_get_text (buffer);
cursor_pos = clutter_text_get_cursor_position (clutter_text);
if (cursor_pos < 0)
cursor_pos = clutter_text_buffer_get_length (buffer);
gtk_im_context_set_surrounding (context, text,
/* length and cursor_index are in bytes */
clutter_text_buffer_get_bytes (buffer),
g_utf8_offset_to_pointer (text, cursor_pos) - text);
return TRUE;
}
static gboolean
st_im_text_delete_surrounding_cb (GtkIMContext *context,
gint offset,
gint n_chars,
StIMText *imtext)
{
ClutterText *clutter_text = CLUTTER_TEXT (imtext);
if (clutter_text_get_editable (clutter_text))
{
gint cursor_pos = clutter_text_get_cursor_position (clutter_text);
clutter_text_delete_text (clutter_text,
cursor_pos + offset,
cursor_pos + offset + n_chars);
}
return TRUE;
}
static void
reset_im_context (StIMText *self)
{
@ -458,6 +485,10 @@ st_im_text_init (StIMText *self)
G_CALLBACK (st_im_text_commit_cb), self);
g_signal_connect (priv->im_context, "preedit-changed",
G_CALLBACK (st_im_text_preedit_changed_cb), self);
g_signal_connect (priv->im_context, "retrieve-surrounding",
G_CALLBACK (st_im_text_retrieve_surrounding_cb), self);
g_signal_connect (priv->im_context, "delete-surrounding",
G_CALLBACK (st_im_text_delete_surrounding_cb), self);
}
/**