[text] Add pre-edit string to ClutterText
Input Methods require to be able to set a "pre-edit string", that is a string that it's just displayed into the Text actor without being committed to the actor's buffer. The string might require custom Pango attributes, and an update of the cursor position.
This commit is contained in:
Emmanuele Bassi
Emmanuele Bassi
parent
2cc88f1140
commit
2883728387
@ -104,6 +104,7 @@ struct _ClutterTextPrivate
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gchar *text;
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gchar *font_name;
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gchar *preedit_str;
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ClutterColor text_color;
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@ -112,6 +113,7 @@ struct _ClutterTextPrivate
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PangoAttrList *attrs;
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PangoAttrList *effective_attrs;
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PangoAttrList *preedit_attrs;
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guint alignment : 2;
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guint wrap : 1;
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@ -128,6 +130,7 @@ struct _ClutterTextPrivate
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guint selection_color_set : 1;
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guint in_select_drag : 1;
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guint cursor_color_set : 1;
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guint preedit_set : 1;
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/* current cursor position */
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gint position;
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@ -157,6 +160,9 @@ struct _ClutterTextPrivate
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ClutterColor cursor_color;
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guint cursor_size;
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guint preedit_cursor_pos;
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gint preedit_n_chars;
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ClutterColor selection_color;
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gint max_length;
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@ -242,6 +248,39 @@ clutter_text_clear_selection (ClutterText *self)
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}
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}
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static gchar *
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clutter_text_get_display_text (ClutterText *self)
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{
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ClutterTextPrivate *priv = self->priv;
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if (priv->text == NULL)
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return g_strdup ("");
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if (G_LIKELY (priv->password_char == 0))
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return g_strndup (priv->text, priv->n_bytes);
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else
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{
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GString *str = g_string_sized_new (priv->n_bytes);
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gunichar invisible_char;
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gchar buf[7];
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gint char_len, i;
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invisible_char = priv->password_char;
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/* we need to convert the string built of invisible
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* characters into UTF-8 for it to be fed to the Pango
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* layout
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*/
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memset (buf, 0, sizeof (buf));
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char_len = g_unichar_to_utf8 (invisible_char, buf);
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for (i = 0; i < priv->n_chars; i++)
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g_string_append_len (str, buf, char_len);
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return g_string_free (str, FALSE);
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}
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}
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static PangoLayout *
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clutter_text_create_layout_no_cache (ClutterText *text,
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gfloat allocation_width,
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@ -249,38 +288,41 @@ clutter_text_create_layout_no_cache (ClutterText *text,
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{
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ClutterTextPrivate *priv = text->priv;
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PangoLayout *layout;
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gchar *contents;
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gsize contents_len;
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layout = clutter_actor_create_pango_layout (CLUTTER_ACTOR (text), NULL);
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pango_layout_set_font_description (layout, priv->font_desc);
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if (priv->text)
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contents = clutter_text_get_display_text (text);
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contents_len = strlen (contents);
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if (priv->editable && priv->preedit_set)
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{
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if (G_LIKELY (priv->password_char == 0))
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pango_layout_set_text (layout, priv->text, priv->n_bytes);
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GString *tmp = g_string_new (contents);
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PangoAttrList *tmp_attrs = pango_attr_list_new ();
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gint cursor_index;
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if (priv->position == 0)
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cursor_index = 0;
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else
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{
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GString *str = g_string_sized_new (priv->n_bytes);
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gunichar invisible_char;
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gchar buf[7];
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gint char_len, i;
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cursor_index = offset_to_bytes (contents, priv->position);
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invisible_char = priv->password_char;
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g_string_insert (tmp, cursor_index, priv->preedit_str);
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/* we need to convert the string built of invisible
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* characters into UTF-8 for it to be fed to the Pango
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* layout
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*/
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memset (buf, 0, sizeof (buf));
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char_len = g_unichar_to_utf8 (invisible_char, buf);
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pango_layout_set_text (layout, tmp->str, tmp->len);
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for (i = 0; i < priv->n_chars; i++)
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g_string_append_len (str, buf, char_len);
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pango_attr_list_splice (tmp_attrs, priv->preedit_attrs,
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cursor_index,
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strlen (priv->preedit_str));
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pango_layout_set_text (layout, str->str, str->len);
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pango_layout_set_attributes (layout, tmp_attrs);
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g_string_free (str, TRUE);
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}
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g_string_free (tmp, TRUE);
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pango_attr_list_unref (tmp_attrs);
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}
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else
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pango_layout_set_text (layout, contents, contents_len);
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if (!priv->editable && priv->effective_attrs)
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pango_layout_set_attributes (layout, priv->effective_attrs);
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@ -355,6 +397,8 @@ clutter_text_create_layout_no_cache (ClutterText *text,
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pango_layout_set_height (layout, height);
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}
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g_free (contents);
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return layout;
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}
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@ -505,6 +549,7 @@ clutter_text_position_to_coords (ClutterText *self,
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{
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ClutterTextPrivate *priv;
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PangoRectangle rect;
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gint n_chars;
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gint password_char_bytes = 1;
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gint index_;
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@ -512,7 +557,12 @@ clutter_text_position_to_coords (ClutterText *self,
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priv = self->priv;
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if (position < -1 || position > priv->n_chars)
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if (priv->preedit_set)
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n_chars = priv->n_chars + priv->preedit_n_chars;
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else
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n_chars = priv->n_chars;
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if (position < -1 || position > n_chars)
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return FALSE;
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if (priv->password_char != 0)
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@ -523,7 +573,7 @@ clutter_text_position_to_coords (ClutterText *self,
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if (priv->password_char == 0)
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index_ = priv->n_bytes;
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else
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index_ = priv->n_chars * password_char_bytes;
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index_ = n_chars * password_char_bytes;
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}
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else if (position == 0)
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{
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@ -534,10 +584,11 @@ clutter_text_position_to_coords (ClutterText *self,
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if (priv->password_char == 0)
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index_ = offset_to_bytes (priv->text, position);
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else
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index_ = priv->position * password_char_bytes;
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index_ = position * password_char_bytes;
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}
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pango_layout_get_cursor_pos (clutter_text_get_layout (self), index_,
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pango_layout_get_cursor_pos (clutter_text_get_layout (self),
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index_,
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&rect, NULL);
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if (x)
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@ -566,9 +617,17 @@ clutter_text_ensure_cursor_position (ClutterText *self)
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ClutterGeometry cursor_pos = { 0, };
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gboolean x_changed, y_changed;
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gboolean width_changed, height_changed;
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gint position;
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position = priv->position;
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CLUTTER_NOTE (MISC, "Cursor at %d (preedit %s at pos: %d)",
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position,
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priv->preedit_set ? "set" : "unset",
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priv->preedit_set ? priv->preedit_cursor_pos : 0);
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x = y = cursor_height = 0;
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clutter_text_position_to_coords (self, priv->position,
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clutter_text_position_to_coords (self, position,
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&x, &y,
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&cursor_height);
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@ -1033,11 +1092,14 @@ cursor_paint (ClutterText *self)
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{
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guint8 paint_opacity = clutter_actor_get_paint_opacity (actor);
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const ClutterColor *color;
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gint position;
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if (priv->position == 0)
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position = priv->position;
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if (position == 0)
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priv->cursor_pos.x -= priv->cursor_size;
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if (priv->position == priv->selection_bound)
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if (position == priv->selection_bound)
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{
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if (priv->cursor_color_set)
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color = &priv->cursor_color;
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@ -1055,12 +1117,11 @@ cursor_paint (ClutterText *self)
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priv->cursor_pos.y,
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priv->cursor_pos.x + priv->cursor_pos.width,
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priv->cursor_pos.y + priv->cursor_pos.height);
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}
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else
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{
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PangoLayout *layout = clutter_text_get_layout (self);
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const gchar *utf8 = priv->text;
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gchar *utf8 = clutter_text_get_display_text (self);
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gint lines;
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gint start_index;
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gint end_index;
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@ -1080,10 +1141,10 @@ cursor_paint (ClutterText *self)
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* color->alpha
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/ 255);
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if (priv->position == 0)
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if (position == 0)
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start_index = 0;
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else
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start_index = offset_to_bytes (utf8, priv->position);
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start_index = offset_to_bytes (utf8, position);
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if (priv->selection_bound == 0)
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end_index = 0;
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@ -1146,6 +1207,8 @@ cursor_paint (ClutterText *self)
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g_free (ranges);
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}
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g_free (utf8);
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}
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}
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}
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@ -1554,7 +1617,6 @@ clutter_text_paint (ClutterActor *self)
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* scrolling */
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priv->text_x = text_x;
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clutter_text_ensure_cursor_position (text);
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}
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else
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{
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@ -2606,6 +2668,7 @@ clutter_text_init (ClutterText *self)
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priv->selection_color_set = FALSE;
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priv->cursor_color_set = FALSE;
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priv->preedit_set = FALSE;
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priv->password_char = 0;
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@ -4383,3 +4446,69 @@ clutter_text_get_single_line_mode (ClutterText *self)
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return self->priv->single_line_mode;
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}
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/**
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* clutter_text_set_preedit_string:
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* @self: a #ClutterText
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* @preedit_str: (allow-none): the pre-edit string, or %NULL to unset it
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* @preedit_attrs: (allow-none): the pre-edit string attributes
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* @cursor_pos: the cursor position for the pre-edit string
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*
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* Sets, or unsets, the pre-edit string. This function is useful
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* for input methods to display a string (with eventual specific
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* Pango attributes) before it is entered inside the #ClutterText
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* buffer.
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*
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* The preedit string and attributes are ignored if the #ClutterText
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* actor is not editable.
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*
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* This function should not be used by applications
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*
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* Since: 1.2
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*/
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void
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clutter_text_set_preedit_string (ClutterText *self,
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const gchar *preedit_str,
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PangoAttrList *preedit_attrs,
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guint cursor_pos)
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{
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ClutterTextPrivate *priv;
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g_return_if_fail (CLUTTER_IS_TEXT (self));
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priv = self->priv;
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g_free (priv->preedit_str);
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if (priv->preedit_attrs != NULL)
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{
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pango_attr_list_unref (priv->preedit_attrs);
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priv->preedit_attrs = NULL;
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}
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priv->preedit_n_chars = 0;
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priv->preedit_cursor_pos = 0;
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if (preedit_str == NULL || *preedit_str == '\0')
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priv->preedit_set = FALSE;
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else
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{
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priv->preedit_str = g_strdup (preedit_str);
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if (priv->preedit_str != NULL)
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priv->preedit_n_chars = g_utf8_strlen (priv->preedit_str, -1);
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else
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priv->preedit_n_chars = 0;
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if (preedit_attrs != NULL)
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priv->preedit_attrs = pango_attr_list_ref (preedit_attrs);
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priv->preedit_cursor_pos =
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CLAMP (cursor_pos, 0, priv->preedit_n_chars);
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priv->preedit_set = TRUE;
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}
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clutter_text_dirty_cache (self);
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clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
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}
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@ -204,6 +204,11 @@ gboolean clutter_text_position_to_coords (ClutterText *sel
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gfloat *y,
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gfloat *line_height);
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void clutter_text_set_preedit_string (ClutterText *self,
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const gchar *preedit_str,
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PangoAttrList *preedit_attr,
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guint cursor_position);
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G_END_DECLS
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#endif /* __CLUTTER_TEXT_H__ */
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@ -1604,6 +1604,7 @@ clutter_text_get_cursor_size
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<SUBSECTION>
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clutter_text_activate
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clutter_text_position_to_coords
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clutter_text_set_preedit_string
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<SUBSECTION Standard>
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CLUTTER_IS_TEXT
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@ -30,6 +30,182 @@ on_entry_activate (ClutterText *text,
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clutter_text_get_selection_bound (text));
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}
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#define is_hex_digit(c) (((c) >= '0' && (c) <= '9') || \
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((c) >= 'a' && (c) <= 'f') || \
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((c) >= 'A' && (c) <= 'F'))
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#define to_hex_digit(c) (((c) <= '9') ? (c) - '0' : ((c) & 7) + 9)
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static gboolean
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on_captured_event (ClutterText *text,
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ClutterEvent *event,
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gpointer dummy G_GNUC_UNUSED)
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{
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gboolean is_unicode_mode = FALSE;
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gunichar c;
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guint keyval;
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if (event->type != CLUTTER_KEY_PRESS)
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return FALSE;
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is_unicode_mode = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (text),
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"unicode-mode"));
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c = clutter_event_get_key_unicode (event);
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keyval = clutter_event_get_key_symbol (event);
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if (keyval == CLUTTER_u)
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{
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ClutterModifierType mods = clutter_event_get_state (event);
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if (is_unicode_mode)
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{
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GString *str = g_object_get_data (G_OBJECT (text), "unicode-str");
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clutter_text_set_preedit_string (text, NULL, NULL, 0);
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g_object_set_data (G_OBJECT (text), "unicode-mode",
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GINT_TO_POINTER (FALSE));
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g_object_set_data (G_OBJECT (text), "unicode-str",
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NULL);
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g_string_free (str, TRUE);
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return FALSE;
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}
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if ((mods & CLUTTER_CONTROL_MASK) &&
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(mods & CLUTTER_SHIFT_MASK))
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{
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PangoAttrList *attrs;
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PangoAttribute *a;
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GString *str = g_string_sized_new (5);
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g_string_append (str, "u");
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g_object_set_data (G_OBJECT (text),
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"unicode-mode",
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GINT_TO_POINTER (TRUE));
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g_object_set_data (G_OBJECT (text),
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"unicode-str",
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str);
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attrs = pango_attr_list_new ();
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a = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
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a->start_index = 0;
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a->end_index = str->len;
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pango_attr_list_insert (attrs, a);
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clutter_text_set_preedit_string (text, str->str, attrs, str->len);
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pango_attr_list_unref (attrs);
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return TRUE;
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}
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return FALSE;
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}
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else if (is_unicode_mode && is_hex_digit (c))
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{
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GString *str = g_object_get_data (G_OBJECT (text), "unicode-str");
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PangoAttrList *attrs;
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PangoAttribute *a;
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gchar buf[8];
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gsize len;
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len = g_unichar_to_utf8 (c, buf);
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buf[len] = '\0';
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g_string_append (str, buf);
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g_debug ("added '%s' to '%s' (len:%d)", buf, str->str, str->len);
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attrs = pango_attr_list_new ();
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a = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
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a->start_index = 0;
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a->end_index = str->len;
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pango_attr_list_insert (attrs, a);
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clutter_text_set_preedit_string (text, str->str, attrs, str->len);
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pango_attr_list_unref (attrs);
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return TRUE;
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}
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else if (is_unicode_mode && (keyval == CLUTTER_BackSpace))
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{
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GString *str = g_object_get_data (G_OBJECT (text), "unicode-str");
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PangoAttrList *attrs;
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PangoAttribute *a;
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||||
g_string_truncate (str, str->len - 1);
|
||||
|
||||
attrs = pango_attr_list_new ();
|
||||
|
||||
a = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
|
||||
a->start_index = 0;
|
||||
a->end_index = str->len;
|
||||
pango_attr_list_insert (attrs, a);
|
||||
|
||||
clutter_text_set_preedit_string (text, str->str, attrs, str->len);
|
||||
|
||||
pango_attr_list_unref (attrs);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
else if (is_unicode_mode &&
|
||||
(keyval == CLUTTER_Return ||
|
||||
keyval == CLUTTER_KP_Enter ||
|
||||
keyval == CLUTTER_ISO_Enter ||
|
||||
keyval == CLUTTER_KP_Space))
|
||||
{
|
||||
GString *str = g_object_get_data (G_OBJECT (text), "unicode-str");
|
||||
const gchar *contents = clutter_text_get_text (text);
|
||||
gunichar uchar = 0;
|
||||
gchar ch;
|
||||
gint i;
|
||||
|
||||
clutter_text_set_preedit_string (text, NULL, NULL, 0);
|
||||
|
||||
g_object_set_data (G_OBJECT (text), "unicode-mode",
|
||||
GINT_TO_POINTER (FALSE));
|
||||
g_object_set_data (G_OBJECT (text), "unicode-str",
|
||||
NULL);
|
||||
|
||||
for (i = 0; i < str->len; i++)
|
||||
{
|
||||
ch = str->str[i];
|
||||
|
||||
if (is_hex_digit (ch))
|
||||
uchar += ((gunichar) to_hex_digit (ch) << ((4 - i) * 4));
|
||||
}
|
||||
|
||||
g_assert (g_unichar_validate (uchar));
|
||||
|
||||
g_string_overwrite (str, 0, contents);
|
||||
g_string_insert_unichar (str,
|
||||
clutter_text_get_cursor_position (text),
|
||||
uchar);
|
||||
|
||||
i = clutter_text_get_cursor_position (text);
|
||||
clutter_text_set_text (text, str->str);
|
||||
|
||||
if (i >= 0)
|
||||
i += 1;
|
||||
else
|
||||
i = -1;
|
||||
|
||||
clutter_text_set_cursor_position (text, i);
|
||||
clutter_text_set_selection_bound (text, i);
|
||||
|
||||
g_string_free (str, TRUE);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
else
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
static ClutterActor *
|
||||
create_label (const ClutterColor *color,
|
||||
const gchar *text)
|
||||
@ -77,6 +253,9 @@ create_entry (const ClutterColor *color,
|
||||
g_signal_connect (retval, "paint",
|
||||
G_CALLBACK (on_entry_paint),
|
||||
NULL);
|
||||
g_signal_connect (retval, "captured-event",
|
||||
G_CALLBACK (on_captured_event),
|
||||
NULL);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user