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mutter/clutter/clutter-text.c
Emmanuele Bassi e3785f4f45 Use the default font from the Backend 
Instead of storing the default font name and size as a pre-processor
macro, use the newly added ClutterBackend API to retrieve the current
default font from the backend.
2008-12-23 15:05:16 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2008 Intel Corporation.
*
* Authored By: Øyvind Kolås <pippin@o-hand.com>
* Emmanuele Bassi <ebassi@linux.intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:clutter-text
* @short_description: An actor for displaying and editing text
*
* #ClutterText is an actor that displays custom text using Pango
* as the text rendering engine.
*
* #ClutterText also allows inline editing of the text if the
* actor is set editable using clutter_text_set_editable().
*
* Selection using keyboard or pointers can be enabled using
* clutter_text_set_selectable().
*
* #ClutterText is available since Clutter 1.0
*/
/* TODO: undo/redo hooks?
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "clutter-text.h"
#include "clutter-binding-pool.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-keysyms.h"
#include "clutter-main.h"
#include "clutter-private.h" /* includes pango/cogl-pango.h */
#include "clutter-units.h"
/* cursor width in pixels */
#define DEFAULT_CURSOR_SIZE 2
/* We need at least three cached layouts to run the allocation without
* regenerating a new layout. First the layout will be generated at
* full width to get the preferred width, then it will be generated at
* the preferred width to get the preferred height and then it might
* be regenerated at a different width to get the height for the
* actual allocated width
*/
#define N_CACHED_LAYOUTS 3
#define CLUTTER_TEXT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_TEXT, ClutterTextPrivate))
typedef struct _LayoutCache LayoutCache;
static const ClutterColor default_cursor_color = { 0, 0, 0, 255 };
static const ClutterColor default_text_color = { 0, 0, 0, 255 };
G_DEFINE_TYPE (ClutterText, clutter_text, CLUTTER_TYPE_ACTOR);
struct _LayoutCache
{
/* Cached layout. Pango internally caches the computed extents
* when they are requested so there is no need to cache that as
* well
*/
PangoLayout *layout;
/* The width that used to generate this layout */
ClutterUnit width;
/* A number representing the age of this cache (so that when a
* new layout is needed the last used cache is replaced)
*/
guint age;
};
struct _ClutterTextPrivate
{
PangoFontDescription *font_desc;
gchar *text;
gchar *font_name;
ClutterColor text_color;
LayoutCache cached_layouts[N_CACHED_LAYOUTS];
guint cache_age;
PangoAttrList *attrs;
PangoAttrList *effective_attrs;
guint alignment : 2;
guint wrap : 1;
guint use_underline : 1;
guint use_markup : 1;
guint ellipsize : 3;
guint single_line_mode : 1;
guint wrap_mode : 3;
guint justify : 1;
guint editable : 1;
guint cursor_visible : 1;
guint activatable : 1;
guint selectable : 1;
guint in_select_drag : 1;
guint cursor_color_set : 1;
guint text_visible : 1;
/* current cursor position */
gint position;
/* current 'other end of selection' position */
gint selection_bound;
/* the x position in the pangolayout, used to
* avoid drifting when repeatedly moving up|down
*/
gint x_pos;
/* the length of the text, in bytes */
gint n_bytes;
/* the length of the text, in characters */
gint n_chars;
/* Where to draw the cursor */
ClutterGeometry cursor_pos;
ClutterColor cursor_color;
guint cursor_size;
gint max_length;
gunichar priv_char;
};
enum
{
PROP_0,
PROP_FONT_NAME,
PROP_TEXT,
PROP_COLOR,
PROP_USE_MARKUP,
PROP_ATTRIBUTES,
PROP_ALIGNMENT,
PROP_LINE_WRAP,
PROP_LINE_WRAP_MODE,
PROP_JUSTIFY,
PROP_ELLIPSIZE,
PROP_POSITION,
PROP_SELECTION_BOUND,
PROP_CURSOR_VISIBLE,
PROP_CURSOR_COLOR,
PROP_CURSOR_COLOR_SET,
PROP_CURSOR_SIZE,
PROP_EDITABLE,
PROP_SELECTABLE,
PROP_ACTIVATABLE,
PROP_TEXT_VISIBLE,
PROP_INVISIBLE_CHAR,
PROP_MAX_LENGTH
};
enum
{
TEXT_CHANGED,
CURSOR_EVENT,
ACTIVATE,
LAST_SIGNAL
};
static guint text_signals[LAST_SIGNAL] = { 0, };
#define offset_real(t,p) \
((p) == -1 ? g_utf8_strlen ((t), -1) : (p))
static gint
offset_to_bytes (const gchar *text,
gint pos)
{
gchar *c = NULL;
gint i, j, len;
if (pos < 0)
return strlen (text);
c = g_utf8_next_char (text);
j = 1;
len = strlen (text);
for (i = 0; i < len; i++)
{
if (&text[i] == c)
{
if (j == pos)
break;
else
{
c = g_utf8_next_char (c);
j++;
}
}
}
return i;
}
#define bytes_to_offset(t,p) \
(g_utf8_pointer_to_offset ((t), (t) + (p)))
static inline void
clutter_text_clear_selection (ClutterText *self)
{
ClutterTextPrivate *priv = self->priv;
priv->selection_bound = priv->position;
}
static PangoLayout *
clutter_text_create_layout_no_cache (ClutterText *text,
ClutterUnit allocation_width)
{
ClutterTextPrivate *priv = text->priv;
PangoContext *context;
PangoLayout *layout;
context = clutter_actor_get_pango_context (CLUTTER_ACTOR (text));
layout = pango_layout_new (context);
pango_layout_set_font_description (layout, priv->font_desc);
if (priv->effective_attrs)
pango_layout_set_attributes (layout, priv->effective_attrs);
pango_layout_set_alignment (layout, priv->alignment);
pango_layout_set_single_paragraph_mode (layout, priv->single_line_mode);
pango_layout_set_justify (layout, priv->justify);
if (priv->text)
{
if (!priv->use_markup)
{
if (priv->text_visible)
pango_layout_set_text (layout, priv->text, priv->n_bytes);
else
{
GString *str = g_string_sized_new (priv->n_bytes);
gunichar invisible_char;
gchar buf[7];
gint char_len, i;
if (priv->priv_char != 0)
invisible_char = priv->priv_char;
else
invisible_char = ' ';
/* we need to convert the string built of invisible
* characters into UTF-8 for it to be fed to the Pango
* layout
*/
memset (buf, 0, sizeof (buf));
char_len = g_unichar_to_utf8 (invisible_char, buf);
for (i = 0; i < priv->n_chars; i++)
g_string_append_len (str, buf, char_len);
pango_layout_set_text (layout, str->str, str->len);
g_string_free (str, TRUE);
}
}
else
pango_layout_set_markup (layout, priv->text, -1);
}
if (allocation_width > 0 &&
(priv->ellipsize != PANGO_ELLIPSIZE_NONE || priv->wrap))
{
int layout_width, layout_height;
pango_layout_get_size (layout, &layout_width, &layout_height);
/* No need to set ellipsize or wrap if we already have enough
* space, since we don't want to make the layout wider than it
* would be otherwise.
*/
if (CLUTTER_UNITS_FROM_PANGO_UNIT (layout_width) > allocation_width)
{
if (priv->ellipsize != PANGO_ELLIPSIZE_NONE)
{
gint width;
width = allocation_width > 0
? CLUTTER_UNITS_TO_PANGO_UNIT (allocation_width)
: -1;
pango_layout_set_ellipsize (layout, priv->ellipsize);
pango_layout_set_width (layout, width);
}
else if (priv->wrap)
{
gint width;
width = allocation_width > 0
? CLUTTER_UNITS_TO_PANGO_UNIT (allocation_width)
: -1;
pango_layout_set_wrap (layout, priv->wrap_mode);
pango_layout_set_width (layout, width);
}
}
}
return layout;
}
static void
clutter_text_dirty_cache (ClutterText *text)
{
ClutterTextPrivate *priv = text->priv;
int i;
/* Delete the cached layouts so they will be recreated the next time
they are needed */
for (i = 0; i < N_CACHED_LAYOUTS; i++)
if (priv->cached_layouts[i].layout)
{
g_object_unref (priv->cached_layouts[i].layout);
priv->cached_layouts[i].layout = NULL;
}
}
/*
* clutter_text_create_layout:
* @text: a #ClutterText
* @allocation_width: the allocation width
*
* Like clutter_text_create_layout_no_cache(), but will also ensure
* the glyphs cache. If a previously cached layout generated using the
* same width is available then that will be used instead of
* generating a new one.
*/
static PangoLayout *
clutter_text_create_layout (ClutterText *text,
ClutterUnit allocation_width)
{
ClutterTextPrivate *priv = text->priv;
LayoutCache *oldest_cache = priv->cached_layouts;
gboolean found_free_cache = FALSE;
int i;
/* Search for a cached layout with the same width and keep track of
the oldest one */
for (i = 0; i < N_CACHED_LAYOUTS; i++)
{
if (priv->cached_layouts[i].layout == NULL)
{
/* Always prefer free cache spaces */
found_free_cache = TRUE;
oldest_cache = priv->cached_layouts + i;
}
/* If this cached layout is using the same width then we can
just return that directly */
else if (priv->cached_layouts[i].width == allocation_width)
{
CLUTTER_NOTE (ACTOR, "ClutterText: %p: cache hit for width %i",
text,
CLUTTER_UNITS_TO_DEVICE (allocation_width));
return priv->cached_layouts[i].layout;
}
else if (!found_free_cache &&
(priv->cached_layouts[i].age < oldest_cache->age))
{
oldest_cache = priv->cached_layouts + i;
}
}
CLUTTER_NOTE (ACTOR, "ClutterText: %p: cache miss for width %i",
text,
CLUTTER_UNITS_TO_DEVICE (allocation_width));
/* If we make it here then we didn't have a cached version so we
need to recreate the layout */
if (oldest_cache->layout)
g_object_unref (oldest_cache->layout);
oldest_cache->layout =
clutter_text_create_layout_no_cache (text, allocation_width);
cogl_pango_ensure_glyph_cache_for_layout (oldest_cache->layout);
/* Mark the 'time' this cache was created and advance the time */
oldest_cache->age = priv->cache_age++;
oldest_cache->width = allocation_width;
return oldest_cache->layout;
}
static gint
clutter_text_coords_to_position (ClutterText *text,
gint x,
gint y)
{
gint index_;
gint px, py;
gint trailing;
px = x * PANGO_SCALE;
py = y * PANGO_SCALE;
pango_layout_xy_to_index (clutter_text_get_layout (text),
px, py,
&index_, &trailing);
return index_ + trailing;
}
/*
* clutter_text_position_to_coords:
* @self: a #ClutterText
* @position: position in characters
* @x: return location for the X coordinate, or %NULL
* @y: return location for the Y coordinate, or %NULL
* @line_height: return location for the line height, or %NULL
*
* Retrieves the coordinates of the given @position.
*
* Return value: %TRUE if the conversion was successful
*/
static gboolean
clutter_text_position_to_coords (ClutterText *self,
gint position,
ClutterUnit *x,
ClutterUnit *y,
ClutterUnit *line_height)
{
ClutterTextPrivate *priv = self->priv;
PangoRectangle rect;
gint priv_char_bytes;
gint index_;
if (!priv->text_visible && priv->priv_char)
priv_char_bytes = g_unichar_to_utf8 (priv->priv_char, NULL);
else
priv_char_bytes = 1;
if (position == -1)
{
if (priv->text_visible)
index_ = priv->n_bytes;
else
index_ = priv->n_chars * priv_char_bytes;
}
else if (position == 0)
{
index_ = 0;
}
else
{
if (priv->text_visible)
index_ = offset_to_bytes (priv->text, position);
else
index_ = priv->position * priv_char_bytes;
}
pango_layout_get_cursor_pos (clutter_text_get_layout (self), index_,
&rect, NULL);
if (x)
*x = CLUTTER_UNITS_FROM_PANGO_UNIT (rect.x);
if (y)
*y = CLUTTER_UNITS_FROM_PANGO_UNIT (rect.y);
if (line_height)
*line_height = CLUTTER_UNITS_FROM_PANGO_UNIT (rect.height);
/* FIXME: should return false if coords were outside text */
return TRUE;
}
static inline void
clutter_text_ensure_cursor_position (ClutterText *self)
{
ClutterTextPrivate *priv = self->priv;
ClutterUnit x, y, cursor_height;
x = y = cursor_height = 0;
clutter_text_position_to_coords (self, priv->position,
&x, &y,
&cursor_height);
priv->cursor_pos.x = CLUTTER_UNITS_TO_DEVICE (x);
priv->cursor_pos.y = CLUTTER_UNITS_TO_DEVICE (y);
priv->cursor_pos.width = priv->cursor_size;
priv->cursor_pos.height = CLUTTER_UNITS_TO_DEVICE (cursor_height);
g_signal_emit (self, text_signals[CURSOR_EVENT], 0, &priv->cursor_pos);
}
static gboolean
clutter_text_truncate_selection (ClutterText *self)
{
ClutterTextPrivate *priv = self->priv;
gint start_index;
gint end_index;
if (!priv->text)
return TRUE;
start_index = offset_real (priv->text, priv->position);
end_index = offset_real (priv->text, priv->selection_bound);
if (end_index == start_index)
return FALSE;
if (end_index < start_index)
{
gint temp = start_index;
start_index = end_index;
end_index = temp;
}
clutter_text_delete_text (self, start_index, end_index);
priv->position = start_index;
priv->selection_bound = start_index;
return TRUE;
}
static void
clutter_text_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterText *self = CLUTTER_TEXT (gobject);
switch (prop_id)
{
case PROP_TEXT:
clutter_text_set_text (self, g_value_get_string (value));
break;
case PROP_COLOR:
clutter_text_set_color (self, clutter_value_get_color (value));
break;
case PROP_FONT_NAME:
clutter_text_set_font_name (self, g_value_get_string (value));
break;
case PROP_USE_MARKUP:
clutter_text_set_use_markup (self, g_value_get_boolean (value));
break;
case PROP_ATTRIBUTES:
clutter_text_set_attributes (self, g_value_get_boxed (value));
break;
case PROP_ALIGNMENT:
clutter_text_set_alignment (self, g_value_get_enum (value));
break;
case PROP_LINE_WRAP:
clutter_text_set_line_wrap (self, g_value_get_boolean (value));
break;
case PROP_LINE_WRAP_MODE:
clutter_text_set_line_wrap_mode (self, g_value_get_enum (value));
break;
case PROP_JUSTIFY:
clutter_text_set_justify (self, g_value_get_boolean (value));
break;
case PROP_ELLIPSIZE:
clutter_text_set_ellipsize (self, g_value_get_enum (value));
break;
case PROP_POSITION:
clutter_text_set_cursor_position (self, g_value_get_int (value));
break;
case PROP_SELECTION_BOUND:
clutter_text_set_selection_bound (self, g_value_get_int (value));
break;
case PROP_CURSOR_VISIBLE:
clutter_text_set_cursor_visible (self, g_value_get_boolean (value));
break;
case PROP_CURSOR_COLOR:
clutter_text_set_cursor_color (self, g_value_get_boxed (value));
break;
case PROP_CURSOR_SIZE:
clutter_text_set_cursor_size (self, g_value_get_int (value));
break;
case PROP_EDITABLE:
clutter_text_set_editable (self, g_value_get_boolean (value));
break;
case PROP_ACTIVATABLE:
clutter_text_set_activatable (self, g_value_get_boolean (value));
break;
case PROP_SELECTABLE:
clutter_text_set_selectable (self, g_value_get_boolean (value));
break;
case PROP_TEXT_VISIBLE:
clutter_text_set_text_visible (self, g_value_get_boolean (value));
break;
case PROP_INVISIBLE_CHAR:
clutter_text_set_invisible_char (self, g_value_get_uint (value));
break;
case PROP_MAX_LENGTH:
clutter_text_set_max_length (self, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
clutter_text_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterTextPrivate *priv = CLUTTER_TEXT (gobject)->priv;
switch (prop_id)
{
case PROP_TEXT:
g_value_set_string (value, priv->text);
break;
case PROP_FONT_NAME:
g_value_set_string (value, priv->font_name);
break;
case PROP_COLOR:
clutter_value_set_color (value, &priv->text_color);
break;
case PROP_CURSOR_VISIBLE:
g_value_set_boolean (value, priv->cursor_visible);
break;
case PROP_CURSOR_COLOR:
clutter_value_set_color (value, &priv->cursor_color);
break;
case PROP_CURSOR_COLOR_SET:
g_value_set_boolean (value, priv->cursor_color_set);
break;
case PROP_CURSOR_SIZE:
g_value_set_int (value, priv->cursor_size);
break;
case PROP_POSITION:
g_value_set_int (value, CLUTTER_FIXED_TO_FLOAT (priv->position));
break;
case PROP_SELECTION_BOUND:
g_value_set_int (value, CLUTTER_FIXED_TO_FLOAT (priv->selection_bound));
break;
case PROP_EDITABLE:
g_value_set_boolean (value, priv->editable);
break;
case PROP_SELECTABLE:
g_value_set_boolean (value, priv->selectable);
break;
case PROP_ACTIVATABLE:
g_value_set_boolean (value, priv->activatable);
break;
case PROP_TEXT_VISIBLE:
g_value_set_boolean (value, priv->text_visible);
break;
case PROP_INVISIBLE_CHAR:
g_value_set_uint (value, priv->priv_char);
break;
case PROP_MAX_LENGTH:
g_value_set_int (value, priv->max_length);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
clutter_text_dispose (GObject *gobject)
{
ClutterText *self = CLUTTER_TEXT (gobject);
/* get rid of the entire cache */
clutter_text_dirty_cache (self);
G_OBJECT_CLASS (clutter_text_parent_class)->dispose (gobject);
}
static void
clutter_text_finalize (GObject *gobject)
{
ClutterText *self = CLUTTER_TEXT (gobject);
ClutterTextPrivate *priv = self->priv;
if (priv->font_desc)
pango_font_description_free (priv->font_desc);
g_free (priv->text);
g_free (priv->font_name);
G_OBJECT_CLASS (clutter_text_parent_class)->finalize (gobject);
}
static void
cursor_paint (ClutterText *self)
{
ClutterTextPrivate *priv = self->priv;
ClutterActor *actor = CLUTTER_ACTOR (self);
guint8 real_opacity;
if (priv->editable && priv->cursor_visible)
{
if (priv->cursor_color_set)
{
real_opacity = clutter_actor_get_paint_opacity (actor)
* priv->cursor_color.alpha
/ 255;
cogl_set_source_color4ub (priv->cursor_color.red,
priv->cursor_color.green,
priv->cursor_color.blue,
real_opacity);
}
else
{
real_opacity = clutter_actor_get_paint_opacity (actor)
* priv->text_color.alpha
/ 255;
cogl_set_source_color4ub (priv->text_color.red,
priv->text_color.green,
priv->text_color.blue,
real_opacity);
}
clutter_text_ensure_cursor_position (self);
if (priv->position == 0)
priv->cursor_pos.x -= 2;
if (priv->position == priv->selection_bound)
{
cogl_rectangle (priv->cursor_pos.x,
priv->cursor_pos.y,
priv->cursor_pos.width,
priv->cursor_pos.height);
}
else
{
PangoLayout *layout = clutter_text_get_layout (self);
const gchar *utf8 = priv->text;
gint lines;
gint start_index;
gint end_index;
gint line_no;
if (priv->position == 0)
start_index = 0;
else
start_index = offset_to_bytes (utf8, priv->position);
if (priv->selection_bound == 0)
end_index = 0;
else
end_index = offset_to_bytes (utf8, priv->selection_bound);
if (start_index > end_index)
{
gint temp = start_index;
start_index = end_index;
end_index = temp;
}
lines = pango_layout_get_line_count (layout);
for (line_no = 0; line_no < lines; line_no++)
{
PangoLayoutLine *line;
gint n_ranges;
gint *ranges;
gint i;
gint index;
gint maxindex;
ClutterUnit y, height;
line = pango_layout_get_line_readonly (layout, line_no);
pango_layout_line_x_to_index (line, G_MAXINT, &maxindex, NULL);
if (maxindex < start_index)
continue;
pango_layout_line_get_x_ranges (line, start_index, end_index,
&ranges,
&n_ranges);
pango_layout_line_x_to_index (line, 0, &index, NULL);
clutter_text_position_to_coords (self,
bytes_to_offset (utf8, index),
NULL, &y, &height);
for (i = 0; i < n_ranges; i++)
{
gint range_x;
gint range_width;
range_x = ranges[i * 2]
/ PANGO_SCALE;
range_width = (ranges[i * 2 + 1] - ranges[i * 2])
/ PANGO_SCALE;
cogl_rectangle (range_x,
CLUTTER_UNITS_TO_DEVICE (y),
range_width,
CLUTTER_UNITS_TO_DEVICE (height));
}
g_free (ranges);
}
}
}
}
static gboolean
clutter_text_button_press (ClutterActor *actor,
ClutterButtonEvent *event)
{
ClutterText *self = CLUTTER_TEXT (actor);
ClutterTextPrivate *priv = self->priv;
ClutterUnit x, y;
gint index_;
x = CLUTTER_UNITS_FROM_INT (event->x);
y = CLUTTER_UNITS_FROM_INT (event->y);
clutter_actor_transform_stage_point (actor, x, y, &x, &y);
index_ = clutter_text_coords_to_position (self,
CLUTTER_UNITS_TO_INT (x),
CLUTTER_UNITS_TO_INT (y));
clutter_text_set_cursor_position (self, bytes_to_offset (priv->text, index_));
clutter_text_set_selection_bound (self, bytes_to_offset (priv->text, index_));
/* grab the pointer */
priv->in_select_drag = TRUE;
clutter_grab_pointer (actor);
/* we'll steal keyfocus if we do not have it */
clutter_actor_grab_key_focus (actor);
return TRUE;
}
static gboolean
clutter_text_motion (ClutterActor *actor,
ClutterMotionEvent *mev)
{
ClutterText *ttext = CLUTTER_TEXT (actor);
ClutterTextPrivate *priv = ttext->priv;
ClutterUnit x, y;
gint index_;
const gchar *text;
if (!priv->in_select_drag)
return FALSE;
text = clutter_text_get_text (ttext);
x = CLUTTER_UNITS_FROM_INT (mev->x);
y = CLUTTER_UNITS_FROM_INT (mev->y);
clutter_actor_transform_stage_point (actor, x, y, &x, &y);
index_ = clutter_text_coords_to_position (ttext,
CLUTTER_UNITS_TO_INT (x),
CLUTTER_UNITS_TO_INT (y));
if (priv->selectable)
clutter_text_set_cursor_position (ttext, bytes_to_offset (text, index_));
else
{
clutter_text_set_cursor_position (ttext, bytes_to_offset (text, index_));
clutter_text_set_selection_bound (ttext, bytes_to_offset (text, index_));
}
return TRUE;
}
static gboolean
clutter_text_button_release (ClutterActor *actor,
ClutterButtonEvent *bev)
{
ClutterText *ttext = CLUTTER_TEXT (actor);
ClutterTextPrivate *priv = ttext->priv;
if (priv->in_select_drag)
{
clutter_ungrab_pointer ();
priv->in_select_drag = FALSE;
return TRUE;
}
return FALSE;
}
static gboolean
clutter_text_key_press (ClutterActor *actor,
ClutterKeyEvent *event)
{
ClutterText *self = CLUTTER_TEXT (actor);
ClutterTextPrivate *priv = self->priv;
ClutterBindingPool *pool;
gboolean res;
gint keyval;
if (!priv->editable)
return FALSE;
keyval = clutter_key_event_symbol (event);
pool = clutter_binding_pool_find (G_OBJECT_TYPE_NAME (actor));
g_assert (pool != NULL);
/* we allow passing synthetic events that only contain
* the Unicode value and not the key symbol
*/
if (keyval == 0 && (event->flags & CLUTTER_EVENT_FLAG_SYNTHETIC))
res = FALSE;
else
res = clutter_binding_pool_activate (pool, keyval,
event->modifier_state,
G_OBJECT (actor));
/* if the key binding has handled the event we bail out
* as fast as we can; otherwise, we try to insert the
* Unicode character inside the key event into the text
* actor
*/
if (res)
return TRUE;
else
{
gunichar key_unichar = clutter_key_event_unicode (event);
/* return is reported as CR, but we want LF */
if (key_unichar == '\r')
key_unichar = '\n';
if (g_unichar_validate (key_unichar))
{
/* truncate the eventual selection so that the
* Unicode character can replace it
*/
clutter_text_truncate_selection (self);
clutter_text_insert_unichar (self, key_unichar);
return TRUE;
}
}
return FALSE;
}
static void
clutter_text_paint (ClutterActor *self)
{
ClutterText *text = CLUTTER_TEXT (self);
ClutterTextPrivate *priv = text->priv;
PangoLayout *layout;
ClutterActorBox alloc = { 0, };
CoglColor color = { 0, };
guint8 real_opacity;
if (priv->font_desc == NULL || priv->text == NULL)
{
CLUTTER_NOTE (ACTOR, "desc: %p, text %p",
priv->font_desc ? priv->font_desc : 0x0,
priv->text ? priv->text : 0x0);
return;
}
cursor_paint (text);
CLUTTER_NOTE (PAINT, "painting text (text:`%s')", priv->text);
clutter_actor_get_allocation_box (self, &alloc);
layout = clutter_text_create_layout (text, alloc.x2 - alloc.x1);
real_opacity = clutter_actor_get_paint_opacity (self)
* priv->text_color.alpha
/ 255;
cogl_color_set_from_4ub (&color,
priv->text_color.red,
priv->text_color.green,
priv->text_color.blue,
real_opacity);
cogl_pango_render_layout (layout, 0, 0, &color, 0);
}
static void
clutter_text_get_preferred_width (ClutterActor *self,
ClutterUnit for_height,
ClutterUnit *min_width_p,
ClutterUnit *natural_width_p)
{
ClutterText *text = CLUTTER_TEXT (self);
ClutterTextPrivate *priv = text->priv;
PangoRectangle logical_rect = { 0, };
PangoLayout *layout;
gint logical_width;
ClutterUnit layout_width;
layout = clutter_text_create_layout (text, -1);
pango_layout_get_extents (layout, NULL, &logical_rect);
/* the X coordinate of the logical rectangle might be non-zero
* according to the Pango documentation; hence, we need to offset
* the width accordingly
*/
logical_width = logical_rect.x + logical_rect.width;
layout_width = logical_width > 0
? CLUTTER_UNITS_FROM_PANGO_UNIT (logical_width)
: 1;
if (min_width_p)
{
if (priv->wrap || priv->ellipsize)
*min_width_p = 1;
else
*min_width_p = layout_width;
}
if (natural_width_p)
*natural_width_p = layout_width;
}
static void
clutter_text_get_preferred_height (ClutterActor *self,
ClutterUnit for_width,
ClutterUnit *min_height_p,
ClutterUnit *natural_height_p)
{
ClutterText *text = CLUTTER_TEXT (self);
if (for_width == 0)
{
if (min_height_p)
*min_height_p = 0;
if (natural_height_p)
*natural_height_p = 0;
}
else
{
PangoLayout *layout;
PangoRectangle logical_rect = { 0, };
gint logical_height;
ClutterUnit layout_height;
layout = clutter_text_create_layout (text, for_width);
pango_layout_get_extents (layout, NULL, &logical_rect);
/* the Y coordinate of the logical rectangle might be non-zero
* according to the Pango documentation; hence, we need to offset
* the height accordingly
*/
logical_height = logical_rect.y + logical_rect.height;
layout_height = CLUTTER_UNITS_FROM_PANGO_UNIT (logical_height);
if (min_height_p)
*min_height_p = layout_height;
if (natural_height_p)
*natural_height_p = layout_height;
}
}
static void
clutter_text_allocate (ClutterActor *self,
const ClutterActorBox *box,
gboolean origin_changed)
{
ClutterText *text = CLUTTER_TEXT (self);
ClutterActorClass *parent_class;
/* Ensure that there is a cached layout with the right width so
* that we don't need to create the text during the paint run
*/
clutter_text_create_layout (text, box->x2 - box->x1);
parent_class = CLUTTER_ACTOR_CLASS (clutter_text_parent_class);
parent_class->allocate (self, box, origin_changed);
}
static gboolean
clutter_text_real_move_left (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
gint pos = priv->position;
gint len;
len = g_utf8_strlen (priv->text, -1);
if (pos != 0 && len !=0)
{
if (pos == -1)
clutter_text_set_cursor_position (self, len - 1);
else
clutter_text_set_cursor_position (self, pos - 1);
}
if (!(priv->selectable && (modifiers & CLUTTER_SHIFT_MASK)))
clutter_text_clear_selection (self);
return TRUE;
}
static gboolean
clutter_text_real_move_right (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
gint pos = priv->position;
gint len;
len = g_utf8_strlen (priv->text, -1);
if (pos != -1 && len !=0)
{
if (pos != len)
clutter_text_set_cursor_position (self, pos + 1);
}
if (!(priv->selectable && (modifiers & CLUTTER_SHIFT_MASK)))
clutter_text_clear_selection (self);
return TRUE;
}
static gboolean
clutter_text_real_move_up (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
PangoLayoutLine *layout_line;
PangoLayout *layout;
gint line_no;
gint index_;
gint x;
layout = clutter_text_get_layout (self);
if (priv->position == 0)
index_ = 0;
else
index_ = offset_to_bytes (priv->text, priv->position);
pango_layout_index_to_line_x (layout, index_,
0,
&line_no, &x);
line_no -= 1;
if (line_no < 0)
return FALSE;
if (priv->x_pos != -1)
x = priv->x_pos;
else
priv->x_pos = x;
layout_line = pango_layout_get_line_readonly (layout, line_no);
if (!layout_line)
return FALSE;
pango_layout_line_x_to_index (layout_line, x, &index_, NULL);
{
gint pos = bytes_to_offset (priv->text, index_);
clutter_text_set_cursor_position (self, pos);
}
if (!(priv->selectable && (modifiers & CLUTTER_SHIFT_MASK)))
clutter_text_clear_selection (self);
return TRUE;
}
static gboolean
clutter_text_real_move_down (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
PangoLayoutLine *layout_line;
PangoLayout *layout;
gint line_no;
gint index_;
gint x;
layout = clutter_text_get_layout (self);
if (priv->position == 0)
index_ = 0;
else
index_ = offset_to_bytes (priv->text, priv->position);
pango_layout_index_to_line_x (layout, index_,
0,
&line_no, &x);
if (priv->x_pos != -1)
x = priv->x_pos;
else
priv->x_pos = x;
layout_line = pango_layout_get_line_readonly (layout, line_no + 1);
if (!layout_line)
return FALSE;
pango_layout_line_x_to_index (layout_line, x, &index_, NULL);
{
gint pos = bytes_to_offset (priv->text, index_);
clutter_text_set_cursor_position (self, pos);
}
if (!(priv->selectable && (modifiers & CLUTTER_SHIFT_MASK)))
clutter_text_clear_selection (self);
return TRUE;
}
static gboolean
clutter_text_real_line_start (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
PangoLayoutLine *layout_line;
PangoLayout *layout;
gint line_no;
gint index_;
gint position;
layout = clutter_text_get_layout (self);
if (priv->position == 0)
index_ = 0;
else
index_ = offset_to_bytes (priv->text, priv->position);
pango_layout_index_to_line_x (layout, index_,
0,
&line_no, NULL);
layout_line = pango_layout_get_line_readonly (layout, line_no);
if (!layout_line)
return FALSE;
pango_layout_line_x_to_index (layout_line, 0, &index_, NULL);
position = bytes_to_offset (priv->text, index_);
clutter_text_set_cursor_position (self, position);
if (!(priv->selectable && (modifiers & CLUTTER_SHIFT_MASK)))
clutter_text_clear_selection (self);
return TRUE;
}
static gboolean
clutter_text_real_line_end (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
PangoLayoutLine *layout_line;
PangoLayout *layout;
gint line_no;
gint index_;
gint trailing;
gint position;
layout = clutter_text_get_layout (self);
if (priv->position == 0)
index_ = 0;
else
index_ = offset_to_bytes (priv->text, priv->position);
pango_layout_index_to_line_x (layout, index_,
0,
&line_no, NULL);
layout_line = pango_layout_get_line_readonly (layout, line_no);
if (!layout_line)
return FALSE;
pango_layout_line_x_to_index (layout_line, G_MAXINT, &index_, &trailing);
index_ += trailing;
position = bytes_to_offset (priv->text, index_);
clutter_text_set_cursor_position (self, position);
if (!(priv->selectable && (modifiers & CLUTTER_SHIFT_MASK)))
clutter_text_clear_selection (self);
return TRUE;
}
static gboolean
clutter_text_real_del_next (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
gint pos;
gint len;
if (clutter_text_truncate_selection (self))
return TRUE;
pos = priv->position;
len = g_utf8_strlen (priv->text, -1);
if (len && pos != -1 && pos < len)
{
clutter_text_delete_text (self, pos, pos + 1);
return TRUE;
}
return FALSE;
}
static gboolean
clutter_text_real_del_prev (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
ClutterTextPrivate *priv = self->priv;
gint pos;
gint len;
if (clutter_text_truncate_selection (self))
return TRUE;
pos = priv->position;
len = g_utf8_strlen (priv->text, -1);
if (pos != 0 && len != 0)
{
if (pos == -1)
{
clutter_text_set_cursor_position (self, len - 1);
clutter_text_set_selection_bound (self, len - 1);
}
else
{
clutter_text_set_cursor_position (self, pos - 1);
clutter_text_set_selection_bound (self, pos - 1);
}
clutter_text_delete_text (self, pos - 1, pos);
return TRUE;
}
return FALSE;
}
static gboolean
clutter_text_real_activate (ClutterText *self,
const gchar *action,
guint keyval,
ClutterModifierType modifiers)
{
return clutter_text_activate (self);
}
static inline void
clutter_text_add_move_binding (ClutterBindingPool *pool,
const gchar *action,
guint key_val,
GCallback callback)
{
clutter_binding_pool_install_action (pool, action,
key_val, 0,
callback,
NULL, NULL);
clutter_binding_pool_install_action (pool, action,
key_val, CLUTTER_SHIFT_MASK,
callback,
NULL, NULL);
}
static void
clutter_text_class_init (ClutterTextClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
ClutterBindingPool *binding_pool;
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (ClutterTextPrivate));
gobject_class->set_property = clutter_text_set_property;
gobject_class->get_property = clutter_text_get_property;
gobject_class->dispose = clutter_text_dispose;
gobject_class->finalize = clutter_text_finalize;
actor_class->paint = clutter_text_paint;
actor_class->get_preferred_width = clutter_text_get_preferred_width;
actor_class->get_preferred_height = clutter_text_get_preferred_height;
actor_class->allocate = clutter_text_allocate;
actor_class->key_press_event = clutter_text_key_press;
actor_class->button_press_event = clutter_text_button_press;
actor_class->button_release_event = clutter_text_button_release;
actor_class->motion_event = clutter_text_motion;
/**
* ClutterText:font-name:
*
* The font to be used by the #ClutterText, as a string
* that can be parsed by pango_font_description_from_string().
*
* Since: 1.0
*/
pspec = g_param_spec_string ("font-name",
"Font Name",
"The font to be used by the text",
NULL,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_FONT_NAME, pspec);
/**
* ClutterText:text:
*
* The text to render inside the actor.
*
* Since: 1.0
*/
pspec = g_param_spec_string ("text",
"Text",
"The text to render",
"",
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_TEXT, pspec);
/**
* ClutterText:color:
*
* The color used to render the text.
*
* Since: 1.0
*/
pspec = clutter_param_spec_color ("color",
"Font Color",
"Color of the font used by the text",
&default_text_color,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_COLOR, pspec);
/**
* ClutterText:editable:
*
* Whether key events delivered to the actor causes editing.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("editable",
"Editable",
"Whether the text is editable",
TRUE,
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_EDITABLE, pspec);
/**
* ClutterText:selectable:
*
* Whether it is possible to select text, either using the pointer
* or the keyboard.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("selectable",
"Selectable",
"Whether the text is selectable",
TRUE,
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_SELECTABLE, pspec);
/**
* ClutterText:activatable:
*
* Toggles whether return invokes the activate signal or not.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("activatable",
"Activatable",
"Whether pressing return causes the "
"activate signal to be emitted",
TRUE,
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_ACTIVATABLE, pspec);
/**
* ClutterText:cursor-visible:
*
* Whether the input cursor is visible or not, it will only be visible
* if both #ClutterText:cursor-visible and #ClutterText:editable are
* set to %TRUE.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("cursor-visible",
"Cursor Visible",
"Whether the input cursor is visible",
TRUE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CURSOR_VISIBLE, pspec);
/**
* ClutterText:cursor-color:
*
* The color of the cursor.
*
* Since: 1.0
*/
pspec = clutter_param_spec_color ("cursor-color",
"Cursor Color",
"Cursor Color",
&default_cursor_color,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CURSOR_COLOR, pspec);
/**
* ClutterText:cursor-color-set:
*
* Will be set to %TRUE if #ClutterText:cursor-color has been set.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("cursor-color-set",
"Cursor Color Set",
"Whether the cursor color has been set",
FALSE,
CLUTTER_PARAM_READABLE);
g_object_class_install_property (gobject_class, PROP_CURSOR_COLOR_SET, pspec);
/**
* ClutterText:cursor-size:
*
* The size of the cursor, in pixels. If set to -1 the size used will
* be the default cursor size of 2 pixels.
*
* Since: 1.0
*/
pspec = g_param_spec_int ("cursor-size",
"Cursor Size",
"The width of the cursor, in pixels",
-1, G_MAXINT, DEFAULT_CURSOR_SIZE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CURSOR_SIZE, pspec);
/**
* ClutterText:position:
*
* The current input cursor position. -1 is taken to be the end of the text
*
* Since: 1.0
*/
pspec = g_param_spec_int ("position",
"Position",
"The cursor position",
-1, G_MAXINT,
-1,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_POSITION, pspec);
/**
* ClutterText:selection-bound:
*
* The current input cursor position. -1 is taken to be the end of the text
*
* Since: 1.0
*/
pspec = g_param_spec_int ("selection-bound",
"Selection-bound",
"The cursor position of the other end "
"of the selection",
-1, G_MAXINT,
-1,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_SELECTION_BOUND, pspec);
/**
* ClutterText:attributes:
*
* A list of #PangoStyleAttribute<!-- -->s to be applied to the
* contents of the #ClutterText actor.
*
* Since: 1.0
*/
pspec = g_param_spec_boxed ("attributes",
"Attributes",
"A list of style attributes to apply to "
"the contents of the actor",
PANGO_TYPE_ATTR_LIST,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_ATTRIBUTES, pspec);
/**
* ClutterText:use-markup:
*
* Whether the text includes Pango markup. See pango_layout_set_markup()
* in the Pango documentation.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("use-markup",
"Use markup",
"Whether or not the text "
"includes Pango markup",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_USE_MARKUP, pspec);
/**
* ClutterText:line-wrap:
*
* Whether to wrap the lines of #ClutterText:text if the contents
* exceed the available allocation. The wrapping strategy is
* controlled by the #ClutterText:line-wrap-mode property.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("line-wrap",
"Line wrap",
"If set, wrap the lines if the text "
"becomes too wide",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_LINE_WRAP, pspec);
/**
* ClutterText:line-wrap-mode:
*
* If #ClutterText:line-wrap is set to %TRUE, this property will
* control how the text is wrapped.
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("line-wrap-mode",
"Line wrap mode",
"Control how line-wrapping is done",
PANGO_TYPE_WRAP_MODE,
PANGO_WRAP_WORD,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_LINE_WRAP_MODE, pspec);
/**
* ClutterText:ellipsize:
*
* The preferred place to ellipsize the contents of the #ClutterText actor
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("ellipsize",
"Ellipsize",
"The preferred place to ellipsize the string",
PANGO_TYPE_ELLIPSIZE_MODE,
PANGO_ELLIPSIZE_NONE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_ELLIPSIZE, pspec);
/**
* ClutterText:alignment:
*
* The preferred alignment for the text. This property controls
* the alignment of multi-line paragraphs.
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("alignment",
"Alignment",
"The preferred alignment for the string, "
"for multi-line text",
PANGO_TYPE_ALIGNMENT,
PANGO_ALIGN_LEFT,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_ALIGNMENT, pspec);
/**
* ClutterText:justify:
*
* Whether the contents of the #ClutterText should be justified
* on both margins.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("justify",
"Justify",
"Whether the text should be justified",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_JUSTIFY, pspec);
/**
* ClutterText:text-visible:
*
* Whether the contents of the #ClutterText actor should be visible
* or substituted by a Unicode character, like in password text fields.
* The Unicode character is set using #ClutterText:invisible-char.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("text-visible",
"Text Visible",
"Whether the text should be visible "
"or subsituted with an invisible "
"Unicode character",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_TEXT_VISIBLE, pspec);
/**
* ClutterText:invisible-char:
*
* The Unicode character used to render the contents of the #ClutterText
* actor if #ClutterText:text-invisible is set to %TRUE.
*
* Since: 1.0
*/
pspec = g_param_spec_unichar ("invisible-char",
"Invisible Character",
"The Unicode character used when the "
"text is set as not visible",
'*',
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_INVISIBLE_CHAR, pspec);
/**
* ClutterText:max-length:
*
* The maximum length of the contents of the #ClutterText actor.
*
* Since: 1.0
*/
pspec = g_param_spec_int ("max-length",
"Max Length",
"Maximum length of the text inside the actor",
-1, G_MAXINT, 0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_MAX_LENGTH, pspec);
/**
* ClutterText::text-changed:
* @self: the #ClutterText that emitted the signal
*
* The ::text-changed signal is emitted after @actor's text changes
*
* Since: 1.0
*/
text_signals[TEXT_CHANGED] =
g_signal_new ("text-changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterTextClass, text_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterText::cursor-event:
* @self: the #ClutterText that emitted the signal
* @geometry: the coordinates of the cursor
*
* The ::cursor-event signal is emitted whenever the cursor position
* changes inside a #ClutterText actor. Inside @geometry it is stored
* the current position and size of the cursor, relative to the actor
* itself.
*
* Since: 1.0
*/
text_signals[CURSOR_EVENT] =
g_signal_new ("cursor-event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterTextClass, cursor_event),
NULL, NULL,
g_cclosure_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
CLUTTER_TYPE_GEOMETRY | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterText::activate
* @self: the #ClutterText that emitted the signal
*
* The ::activate signal is emitted each time the actor is 'activated'
* by the user, normally by pressing the 'Enter' key. The signal is
* emitted only if #ClutterText:activatable is set to %TRUE.
*
* Since: 1.0
*/
text_signals[ACTIVATE] =
g_signal_new ("activate",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterTextClass, activate),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
binding_pool = clutter_binding_pool_get_for_class (klass);
clutter_text_add_move_binding (binding_pool, "move-left",
CLUTTER_Left,
G_CALLBACK (clutter_text_real_move_left));
clutter_text_add_move_binding (binding_pool, "move-left",
CLUTTER_KP_Left,
G_CALLBACK (clutter_text_real_move_left));
clutter_text_add_move_binding (binding_pool, "move-right",
CLUTTER_Right,
G_CALLBACK (clutter_text_real_move_right));
clutter_text_add_move_binding (binding_pool, "move-right",
CLUTTER_KP_Right,
G_CALLBACK (clutter_text_real_move_right));
clutter_text_add_move_binding (binding_pool, "move-up",
CLUTTER_Up,
G_CALLBACK (clutter_text_real_move_up));
clutter_text_add_move_binding (binding_pool, "move-up",
CLUTTER_KP_Up,
G_CALLBACK (clutter_text_real_move_up));
clutter_text_add_move_binding (binding_pool, "move-down",
CLUTTER_Down,
G_CALLBACK (clutter_text_real_move_down));
clutter_text_add_move_binding (binding_pool, "move-down",
CLUTTER_KP_Down,
G_CALLBACK (clutter_text_real_move_down));
clutter_text_add_move_binding (binding_pool, "line-start",
CLUTTER_Home,
G_CALLBACK (clutter_text_real_line_start));
clutter_text_add_move_binding (binding_pool, "line-start",
CLUTTER_KP_Home,
G_CALLBACK (clutter_text_real_line_start));
clutter_text_add_move_binding (binding_pool, "line-start",
CLUTTER_Begin,
G_CALLBACK (clutter_text_real_line_start));
clutter_text_add_move_binding (binding_pool, "line-end",
CLUTTER_End,
G_CALLBACK (clutter_text_real_line_end));
clutter_text_add_move_binding (binding_pool, "line-end",
CLUTTER_KP_End,
G_CALLBACK (clutter_text_real_line_end));
clutter_binding_pool_install_action (binding_pool, "delete-next",
CLUTTER_Delete, 0,
G_CALLBACK (clutter_text_real_del_next),
NULL, NULL);
clutter_binding_pool_install_action (binding_pool, "delete-next",
CLUTTER_KP_Delete, 0,
G_CALLBACK (clutter_text_real_del_next),
NULL, NULL);
clutter_binding_pool_install_action (binding_pool, "delete-prev",
CLUTTER_BackSpace, 0,
G_CALLBACK (clutter_text_real_del_prev),
NULL, NULL);
clutter_binding_pool_install_action (binding_pool, "activate",
CLUTTER_Return, 0,
G_CALLBACK (clutter_text_real_activate),
NULL, NULL);
clutter_binding_pool_install_action (binding_pool, "activate",
CLUTTER_KP_Enter, 0,
G_CALLBACK (clutter_text_real_activate),
NULL, NULL);
clutter_binding_pool_install_action (binding_pool, "activate",
CLUTTER_ISO_Enter, 0,
G_CALLBACK (clutter_text_real_activate),
NULL, NULL);
}
static void
clutter_text_init (ClutterText *self)
{
ClutterTextPrivate *priv;
const gchar *font_name;
int i;
self->priv = priv = CLUTTER_TEXT_GET_PRIVATE (self);
priv->alignment = PANGO_ALIGN_LEFT;
priv->wrap = FALSE;
priv->wrap_mode = PANGO_WRAP_WORD;
priv->ellipsize = PANGO_ELLIPSIZE_NONE;
priv->use_underline = FALSE;
priv->use_markup = FALSE;
priv->justify = FALSE;
for (i = 0; i < N_CACHED_LAYOUTS; i++)
priv->cached_layouts[i].layout = NULL;
/* default to "" so that clutter_text_get_text() will
* return a valid string and we can safely call strlen()
* or strcmp() on it
*/
priv->text = g_strdup ("");
priv->text_color = default_text_color;
priv->cursor_color = default_cursor_color;
/* get the default font name from the context */
font_name = clutter_backend_get_font_name (clutter_get_default_backend ());
priv->font_name = g_strdup (font_name);
priv->font_desc = pango_font_description_from_string (font_name);
priv->position = -1;
priv->selection_bound = -1;
priv->x_pos = -1;
priv->cursor_visible = TRUE;
priv->editable = FALSE;
priv->selectable = TRUE;
priv->cursor_color_set = FALSE;
priv->text_visible = TRUE;
priv->priv_char = '*';
priv->max_length = 0;
priv->cursor_size = DEFAULT_CURSOR_SIZE;
}
/**
* clutter_text_new:
*
* Creates a new #ClutterText actor. This actor can be used to
* display and edit text.
*
* Return value: the newly created #ClutterText actor
*
* Since: 1.0
*/
ClutterActor *
clutter_text_new (void)
{
return g_object_new (CLUTTER_TYPE_TEXT, NULL);
}
/**
* clutter_text_new_full:
* @font_name: a string with a font description
* @text: the contents of the actor
* @color: the color to be used to render @text
*
* Creates a new #ClutterText actor, using @font_name as the font
* description; @text will be used to set the contents of the actor;
* and @color will be used as the color to render @text.
*
* This function is equivalent to calling clutter_text_new(),
* clutter_text_set_font_name(), clutter_text_set_text() and
* clutter_text_set_color().
*
* Return value: the newly created #ClutterText actor
*
* Since: 1.0
*/
ClutterActor *
clutter_text_new_full (const gchar *font_name,
const gchar *text,
const ClutterColor *color)
{
return g_object_new (CLUTTER_TYPE_TEXT,
"font-name", font_name,
"text", text,
"color", color,
NULL);
}
/**
* clutter_text_new_with_text:
* @font_name: a string with a font description
* @text: the contents of the actor
*
* Creates a new #ClutterText actor, using @font_name as the font
* description; @text will be used to set the contents of the actor.
*
* This function is equivalent to calling clutter_text_new(),
* clutter_text_set_font_name(), and clutter_text_set_text().
*
* Return value: the newly created #ClutterText actor
*
* Since: 1.0
*/
ClutterActor *
clutter_text_new_with_text (const gchar *font_name,
const gchar *text)
{
return g_object_new (CLUTTER_TYPE_TEXT,
"font-name", font_name,
"text", text,
NULL);
}
/**
* clutter_text_set_editable:
* @self: a #ClutterText
* @editable: whether the #ClutterText should be editable
*
* Sets whether the #ClutterText actor should be editable.
*
* An editable #ClutterText with key focus set using
* clutter_actor_grab_key_focus() or clutter_stage_take_key_focus()
* will receive key events and will update its contents accordingly.
*
* Since: 1.0
*/
void
clutter_text_set_editable (ClutterText *self,
gboolean editable)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->editable != editable)
{
priv->editable = editable;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "editable");
}
}
/**
* clutter_text_get_editable:
* @self: a #ClutterText
*
* Retrieves whether a #ClutterText is editable or not.
*
* Return value: %TRUE if the actor is editable
*
* Since: 1.0
*/
gboolean
clutter_text_get_editable (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), FALSE);
return self->priv->editable;
}
/**
* clutter_text_set_selectable:
* @self: a #ClutterText
* @selectable: whether the #ClutterText actor should be selectable
*
* Sets whether a #ClutterText actor should be selectable.
*
* A selectable #ClutterText will allow selecting its contents using
* the pointer or the keyboard.
*
* Since: 1.0
*/
void
clutter_text_set_selectable (ClutterText *self,
gboolean selectable)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->selectable != selectable)
{
priv->selectable = selectable;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "selectable");
}
}
/**
* clutter_text_get_selectable:
* @self: a #ClutterText
*
* Retrieves whether a #ClutterText is selectable or not.
*
* Return value: %TRUE if the actor is selectable
*
* Since: 1.0
*/
gboolean
clutter_text_get_selectable (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), TRUE);
return self->priv->selectable;
}
/**
* clutter_text_set_activatable:
* @self: a #ClutterText
* @activatable: whether the #ClutterText actor should be activatable
*
* Sets whether a #ClutterText actor should be activatable.
*
* An activatable #ClutterText actor will emit the #ClutterText::activate
* signal whenever the 'Enter' (or 'Return') key is pressed; if it is not
* activatable, a new line will be appended to the current content.
*
* An activatable #ClutterText must also be set as editable using
* clutter_text_set_editable().
*
* Since: 1.0
*/
void
clutter_text_set_activatable (ClutterText *self,
gboolean activatable)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->activatable != activatable)
{
priv->activatable = activatable;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "activatable");
}
}
/**
* clutter_text_get_activatable:
* @self: a #ClutterText
*
* Retrieves whether a #ClutterText is activatable or not.
*
* Return value: %TRUE if the actor is activatable
*
* Since: 1.0
*/
gboolean
clutter_text_get_activatable (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), TRUE);
return self->priv->activatable;
}
/**
* clutter_text_activate:
* @self: a #ClutterText
*
* Emits the #ClutterText::activate signal, if @self has been set
* as activatable using clutter_text_set_activatable().
*
* This function can be used to emit the ::activate signal inside
* a #ClutterActor::captured-event or #ClutterActor::key-press-event
* signal handlers before the default signal handler for the
* #ClutterText is invoked.
*
* Return value: %TRUE if the ::activate signal has been emitted,
* and %FALSE otherwise
*
* Since: 1.0
*/
gboolean
clutter_text_activate (ClutterText *self)
{
ClutterTextPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_TEXT (self), FALSE);
priv = self->priv;
if (priv->activatable)
{
g_signal_emit (self, text_signals[ACTIVATE], 0);
return TRUE;
}
return FALSE;
}
/**
* clutter_text_set_cursor_visible:
* @self: a #ClutterText
* @cursor_visible: whether the cursor should be visible
*
* Sets whether the cursor of a #ClutterText actor should be
* visible or not.
*
* The color of the cursor will be the same as the text color
* unless clutter_text_set_cursor_color() has been called.
*
* The size of the cursor can be set using clutter_text_set_cursor_size().
*
* The position of the cursor can be changed programmatically using
* clutter_text_set_cursor_position().
*
* Since: 1.0
*/
void
clutter_text_set_cursor_visible (ClutterText *self,
gboolean cursor_visible)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->cursor_visible != cursor_visible)
{
priv->cursor_visible = cursor_visible;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "cursor-visible");
}
}
/**
* clutter_text_get_cursor_visible:
* @self: a #ClutterText
*
* Retrieves whether the cursor of a #ClutterText actor is visible.
*
* Return value: %TRUE if the cursor is visible
*
* Since: 1.0
*/
gboolean
clutter_text_get_cursor_visible (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), TRUE);
return self->priv->cursor_visible;
}
/**
* clutter_text_set_cursor_color:
* @self: a #ClutterText
* @color: the color of the cursor, or %NULL to unset it
*
* Sets the color of the cursor of a #ClutterText actor.
*
* If @color is %NULL, the cursor color will be the same as the
* text color.
*
* Since: 1.0
*/
void
clutter_text_set_cursor_color (ClutterText *self,
const ClutterColor *color)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (color)
{
priv->cursor_color = *color;
priv->cursor_color_set = TRUE;
}
else
priv->cursor_color_set = FALSE;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "cursor-color");
g_object_notify (G_OBJECT (self), "cursor-color-set");
}
/**
* clutter_text_get_cursor_color:
* @self: a #ClutterText
* @color: return location for a #ClutterColor
*
* Retrieves the color of the cursor of a #ClutterText actor.
*
* Since: 1.0
*/
void
clutter_text_get_cursor_color (ClutterText *self,
ClutterColor *color)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (color != NULL);
priv = self->priv;
*color = priv->cursor_color;
}
/**
* clutter_text_set_selection:
* @self: a #ClutterText
* @start_pos: start of the selection, in characters
* @end_pos: end of the selection, in characters
*
* Selects the region of text between @start_pos and @end_pos.
*
* This function changes the position of the cursor to match
* @start_pos and the selection bound to match @end_pos.
*
* Since: 1.0
*/
void
clutter_text_set_selection (ClutterText *self,
gssize start_pos,
gssize end_pos)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (end_pos < 0)
end_pos = priv->n_chars;
start_pos = MIN (priv->n_chars, start_pos);
end_pos = MIN (priv->n_chars, end_pos);
g_object_freeze_notify (G_OBJECT (self));
clutter_text_set_cursor_position (self, start_pos);
clutter_text_set_selection_bound (self, end_pos);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_text_get_selection:
* @self: a #ClutterText
*
* Retrieves the currently selected text.
*
* Return value: a newly allocated string containing the currently
* selected text, or %NULL. Use g_free() to free the returned
* string.
*
* Since: 1.0
*/
gchar *
clutter_text_get_selection (ClutterText *self)
{
ClutterTextPrivate *priv;
gchar *str;
gint len;
gint start_index, end_index;
gint start_offset, end_offset;
g_return_val_if_fail (CLUTTER_IS_TEXT (self), NULL);
priv = self->priv;
start_index = priv->position;
end_index = priv->selection_bound;
if (end_index == start_index)
return g_strdup ("");
if (end_index < start_index)
{
gint temp = start_index;
start_index = end_index;
end_index = temp;
}
start_offset = offset_to_bytes (priv->text, start_index);
end_offset = offset_to_bytes (priv->text, end_index);
len = end_offset - start_offset;
str = g_malloc (len + 1);
g_utf8_strncpy (str, priv->text + start_offset, end_index - start_index);
return str;
}
/**
* clutter_text_set_selection_bound:
* @self: a #ClutterText
* @selection_bound: the position of the end of the selection, in characters
*
* Sets the other end of the selection, starting from the current
* cursor position.
*
* If @selection_bound is -1, the selection unset.
*
* Since: 1.0
*/
void
clutter_text_set_selection_bound (ClutterText *self,
gint selection_bound)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->selection_bound != selection_bound)
{
priv->selection_bound = selection_bound;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "selection-bound");
}
}
/**
* clutter_text_get_selection_bound:
* @self: a #ClutterText
*
* Retrieves the other end of the selection of a #ClutterText actor,
* in characters from the current cursor position.
*
* Return value: the position of the other end of the selection
*
* Since: 1.0
*/
gint
clutter_text_get_selection_bound (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), -1);
return self->priv->selection_bound;
}
/**
* clutter_text_get_font_name:
* @self: a #ClutterText
*
* Retrieves the font name as set by clutter_text_set_font_name().
*
* Return value: a string containing the font name. The returned
* string is owned by the #ClutterText actor and should not be
* modified or freed
*
* Since: 1.0
*/
G_CONST_RETURN gchar *
clutter_text_get_font_name (ClutterText *text)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (text), NULL);
return text->priv->font_name;
}
/**
* clutter_text_set_font_name:
* @self: a #ClutterText
* @font_name: a font name, or %NULL to set the default font name
*
* Sets the font used by a #ClutterText. The @font_name string
* must either be %NULL, which means that the font name from the
* default #ClutterBackend will be used; or be something that can
* be parsed by the pango_font_description_from_string() function,
* like:
*
* |[
* clutter_text_set_font_name (text, "Sans 10pt");
* clutter_text_set_font_name (text, "Serif 16px");
* clutter_text_set_font_name (text, "Helvetica 10");
* ]|
*
* Since: 1.0
*/
void
clutter_text_set_font_name (ClutterText *self,
const gchar *font_name)
{
ClutterTextPrivate *priv;
PangoFontDescription *desc;
g_return_if_fail (CLUTTER_IS_TEXT (self));
/* get the default font name from the backend */
if (!font_name || font_name[0] == '\0')
font_name = clutter_backend_get_font_name (clutter_get_default_backend ());
priv = self->priv;
if (priv->font_name && strcmp (priv->font_name, font_name) == 0)
return;
desc = pango_font_description_from_string (font_name);
if (!desc)
{
g_warning ("Attempting to create a PangoFontDescription for "
"font name `%s', but failed.",
font_name);
return;
}
g_free (priv->font_name);
priv->font_name = g_strdup (font_name);
if (priv->font_desc)
pango_font_description_free (priv->font_desc);
priv->font_desc = desc;
clutter_text_dirty_cache (self);
if (priv->text && priv->text[0] != '\0')
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "font-name");
}
/**
* clutter_text_get_text:
* @self: a #ClutterText
*
* Retrieves a pointer to the current contents of a #ClutterText
* actor.
*
* If you need a copy of the contents for manipulating, either
* use g_strdup() on the returned string, or use:
*
* |[
* copy = clutter_text_get_chars (text, 0, -1);
* ]|
*
* Which will return a newly allocated string.
*
* Return value: the contents of the actor. The returned string
* is owned by the #ClutterText actor and should never be
* modified or freed
*
* Since: 1.0
*/
G_CONST_RETURN gchar *
clutter_text_get_text (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), NULL);
return self->priv->text;
}
/**
* clutter_text_set_text:
* @self: a #ClutterText
* @text: the text to set
*
* Sets the contents of a #ClutterText actor. The @text string
* must not be %NULL; to unset the current contents of the
* #ClutterText actor simply pass "" (an empty string).
*
* Since: 1.0
*/
void
clutter_text_set_text (ClutterText *self,
const gchar *text)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (text != NULL);
priv = self->priv;
if (priv->max_length > 0)
{
gint len = g_utf8_strlen (text, -1);
if (len < priv->max_length)
{
g_free (priv->text);
priv->text = g_strdup (text);
priv->n_bytes = strlen (text);
priv->n_chars = len;
}
else
{
gchar *n = g_malloc0 (priv->max_length + 1);
g_free (priv->text);
g_utf8_strncpy (n, text, priv->max_length);
priv->text = n;
priv->n_bytes = strlen (n);
priv->n_chars = priv->max_length;
}
}
else
{
g_free (priv->text);
priv->text = g_strdup (text);
priv->n_bytes = strlen (text);
priv->n_chars = g_utf8_strlen (text, -1);
}
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_signal_emit (self, text_signals[TEXT_CHANGED], 0);
g_object_notify (G_OBJECT (self), "text");
}
/**
* clutter_text_get_layout:
* @self: a #ClutterText
*
* Retrieves the current #PangoLayout used by a #ClutterText actor.
*
* Return value: a #PangoLayout. The returned object is owned by
* the #ClutterText actor and should not be modified or freed
*
* Since: 1.0
*/
PangoLayout *
clutter_text_get_layout (ClutterText *self)
{
ClutterUnit width;
g_return_val_if_fail (CLUTTER_IS_TEXT (self), NULL);
width = clutter_actor_get_widthu (CLUTTER_ACTOR (self));
return clutter_text_create_layout (self, width);
}
/**
* clutter_text_set_color:
* @self: a #ClutterText
* @color: a #ClutterColor
*
* Sets the color of the contents of a #ClutterText actor.
*
* The overall opacity of the #ClutterText actor will be the
* result of the alpha value of @color and the composited
* opacity of the actor itself on the scenegraph, as returned
* by clutter_actor_get_paint_opacity().
*
* Since: 1.0
*/
void
clutter_text_set_color (ClutterText *self,
const ClutterColor *color)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (color != NULL);
priv = self->priv;
priv->text_color = *color;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "color");
}
/**
* clutter_text_get_color:
* @self: a #ClutterText
* @color: return location for a #ClutterColor
*
* Retrieves the text color as set by clutter_text_get_color().
*
* Since: 1.0
*/
void
clutter_text_get_color (ClutterText *self,
ClutterColor *color)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (color != NULL);
priv = self->priv;
*color = priv->text_color;
}
/**
* clutter_text_set_ellipsize:
* @self: a #ClutterText
* @mode: a #PangoEllipsizeMode
*
* Sets the mode used to ellipsize (add an ellipsis: "...") to the
* text if there is not enough space to render the entire contents
* of a #ClutterText actor
*
* Since: 1.0
*/
void
clutter_text_set_ellipsize (ClutterText *self,
PangoEllipsizeMode mode)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE &&
mode <= PANGO_ELLIPSIZE_END);
priv = self->priv;
if ((PangoEllipsizeMode) priv->ellipsize != mode)
{
priv->ellipsize = mode;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "ellipsize");
}
}
/**
* clutter_text_get_ellipsize:
* @self: a #ClutterText
*
* Returns the ellipsizing position of a #ClutterText actor, as
* set by clutter_text_set_ellipsize().
*
* Return value: #PangoEllipsizeMode
*
* Since: 1.0
*/
PangoEllipsizeMode
clutter_text_get_ellipsize (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), PANGO_ELLIPSIZE_NONE);
return self->priv->ellipsize;
}
/**
* clutter_text_get_line_wrap:
* @self: a #ClutterText
*
* Retrieves the value set using clutter_text_set_line_wrap().
*
* Return value: %TRUE if the #ClutterText actor should wrap
* its contents
*
* Since: 1.0
*/
gboolean
clutter_text_get_line_wrap (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), FALSE);
return self->priv->wrap;
}
/**
* clutter_text_set_line_wrap:
* @self: a #ClutterText
* @line_wrap: whether the contents should wrap
*
* Sets whether the contents of a #ClutterText actor should wrap,
* if they don't fit the size assigned to the actor.
*
* Since: 1.0
*/
void
clutter_text_set_line_wrap (ClutterText *self,
gboolean line_wrap)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->wrap != line_wrap)
{
priv->wrap = line_wrap;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "line-wrap");
}
}
/**
* clutter_text_set_line_wrap_mode:
* @self: a #ClutterText
* @wrap_mode: the line wrapping mode
*
* If line wrapping is enabled (see clutter_text_set_line_wrap()) this
* function controls how the line wrapping is performed. The default is
* %PANGO_WRAP_WORD which means wrap on word boundaries.
*
* Since: 1.0
*/
void
clutter_text_set_line_wrap_mode (ClutterText *self,
PangoWrapMode wrap_mode)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->wrap_mode != wrap_mode)
{
priv->wrap_mode = wrap_mode;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "line-wrap-mode");
}
}
/**
* clutter_text_get_line_wrap_mode:
* @self: a #ClutterText
*
* Retrieves the line wrap mode used by the #ClutterText actor.
*
* See clutter_text_set_line_wrap_mode ().
*
* Return value: the wrap mode used by the #ClutterText
*
* Since: 1.0
*/
PangoWrapMode
clutter_text_get_line_wrap_mode (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), PANGO_WRAP_WORD);
return self->priv->wrap_mode;
}
/**
* clutter_text_set_attributes:
* @self: a #ClutterText
* @attrs: a #PangoAttrList or %NULL to unset the attributes
*
* Sets the attributes list that are going to be applied to the
* #ClutterText contents. The attributes set with this function
* will be ignored if the #ClutterText:use_markup property is
* set to %TRUE.
*
* The #ClutterText actor will take a reference on the #PangoAttrList
* passed to this function.
*
* Since: 1.0
*/
void
clutter_text_set_attributes (ClutterText *self,
PangoAttrList *attrs)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (attrs)
pango_attr_list_ref (attrs);
if (priv->attrs)
pango_attr_list_unref (priv->attrs);
if (!priv->use_markup)
{
if (attrs)
pango_attr_list_ref (attrs);
if (priv->effective_attrs)
pango_attr_list_unref (priv->effective_attrs);
priv->effective_attrs = attrs;
}
priv->attrs = attrs;
clutter_text_dirty_cache (self);
g_object_notify (G_OBJECT (self), "attributes");
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
}
/**
* clutter_text_get_attributes:
* @self: a #ClutterText
*
* Gets the attribute list that was set on the #ClutterText actor
* clutter_text_set_attributes(), if any.
*
* Return value: the attribute list, or %NULL if none was set. The
* returned value is owned by the #ClutterText and should not be
* unreferenced.
*
* Since: 1.0
*/
PangoAttrList *
clutter_text_get_attributes (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), NULL);
return self->priv->attrs;
}
/**
* clutter_text_set_alignment:
* @self: a #ClutterText
* @alignment: A #PangoAlignment
*
* Sets text alignment of the #ClutterText actor.
*
* The alignment will only be used when the contents of the
* #ClutterText actor are enough to wrap, and the #ClutterText:line-wrap
* property is set to %TRUE.
*
* Since: 1.0
*/
void
clutter_text_set_alignment (ClutterText *self,
PangoAlignment alignment)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->alignment != alignment)
{
priv->alignment = alignment;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "alignment");
}
}
/**
* clutter_text_get_alignment:
* @self: a #ClutterText
*
* Retrieves the alignment of @self.
*
* Return value: a #PangoAlignment
*
* Since 1.0
*/
PangoAlignment
clutter_text_get_alignment (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), PANGO_ALIGN_LEFT);
return self->priv->alignment;
}
/**
* clutter_text_set_use_markup:
* @self: a #ClutterText
* @setting: %TRUE if the text should be parsed for markup.
*
* Sets whether the contents of the #ClutterText actor contains markup
* in <link linkend="PangoMarkupFormat">Pango's text markup language</link>.
*
* Since: 1.0
*/
void
clutter_text_set_use_markup (ClutterText *self,
gboolean setting)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->use_markup != setting)
{
priv->use_markup = setting;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "use-markup");
}
}
/**
* clutter_text_get_use_markup:
* @self: a #ClutterText
*
* Retrieves whether the contents of the #ClutterText actor should be
* parsed for the Pango text markup.
*
* Return value: %TRUE if the contents will be parsed for markup
*
* Since: 1.0
*/
gboolean
clutter_text_get_use_markup (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), FALSE);
return self->priv->use_markup;
}
/**
* clutter_text_set_justify:
* @self: a #ClutterText
* @justify: whether the text should be justified
*
* Sets whether the text of the #ClutterText actor should be justified
* on both margins. This setting is ignored if Clutter is compiled
* against Pango &lt; 1.18.
*
* Since: 1.0
*/
void
clutter_text_set_justify (ClutterText *self,
gboolean justify)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->justify != justify)
{
priv->justify = justify;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "justify");
}
}
/**
* clutter_text_get_justify:
* @self: a #ClutterText
*
* Retrieves whether the #ClutterText actor should justify its contents
* on both margins.
*
* Return value: %TRUE if the text should be justified
*
* Since: 0.6
*/
gboolean
clutter_text_get_justify (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), FALSE);
return self->priv->justify;
}
/**
* clutter_text_get_cursor_position:
* @self: a #ClutterText
*
* Retrieves the cursor position.
*
* Return value: the cursor position, in characters
*
* Since: 1.0
*/
gint
clutter_text_get_cursor_position (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), -1);
return self->priv->position;
}
/**
* clutter_text_set_cursor_position:
* @self: a #ClutterText
* @position: the new cursor position, in characters
*
* Sets the cursor of a #ClutterText actor at @position.
*
* The position is expressed in characters, not in bytes.
*
* Since: 1.0
*/
void
clutter_text_set_cursor_position (ClutterText *self,
gint position)
{
ClutterTextPrivate *priv;
gint len;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
len = g_utf8_strlen (priv->text, -1);
if (position < 0 || position >= len)
priv->position = -1;
else
priv->position = position;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
}
/**
* clutter_text_set_cursor_size:
* @self: a #ClutterText
* @size: the size of the cursor, in pixels, or -1 to use the
* default value
*
* Sets the size of the cursor of a #ClutterText. The cursor
* will only be visible if the #ClutterText:cursor-visible property
* is set to %TRUE.
*
* Since: 1.0
*/
void
clutter_text_set_cursor_size (ClutterText *self,
gint size)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->cursor_size != size)
{
if (size < 0)
size = DEFAULT_CURSOR_SIZE;
priv->cursor_size = size;
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "cursor-size");
}
}
/**
* clutter_text_get_cursor_size:
* @self: a #ClutterText
*
* Retrieves the size of the cursor of a #ClutterText actor.
*
* Return value: the size of the cursor, in pixels
*
* Since: 1.0
*/
guint
clutter_text_get_cursor_size (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), DEFAULT_CURSOR_SIZE);
return self->priv->cursor_size;
}
/**
* clutter_text_set_text_visible:
* @self: a #ClutterText
* @visible: %TRUE if the contents of the actor are displayed as plain text.
*
* Sets whether the contents of the text actor are visible or not. When
* visibility is set to %FALSE, characters are displayed as the invisible
* char, and will also appear that way when the text in the text actor is
* copied elsewhere.
*
* The default invisible char is the asterisk '*', but it can be changed with
* clutter_text_set_invisible_char().
*
* Since: 1.0
*/
void
clutter_text_set_text_visible (ClutterText *self,
gboolean visible)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->text_visible != visible)
{
priv->text_visible = visible;
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "text-visible");
}
}
/**
* clutter_text_get_text_visible:
* @self: a #ClutterText
*
* Retrieves the actor's text visibility.
*
* Return value: %TRUE if the contents of the actor are displayed as plaintext
*
* Since: 1.0
*/
gboolean
clutter_text_get_text_visible (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), TRUE);
return self->priv->text_visible;
}
/**
* clutter_text_set_invisible_char:
* @self: a #ClutterText
* @wc: a Unicode character
*
* Sets the character to use in place of the actual text when
* clutter_text_set_text_visible() has been called to set text visibility
* to %FALSE. i.e. this is the character used in "password mode" to show the
* user how many characters have been typed. The default invisible char is an
* asterisk ('*'). If you set the invisible char to 0, then the user will get
* no feedback at all: there will be no text on the screen as they type.
*
* Since: 1.0
*/
void
clutter_text_set_invisible_char (ClutterText *self,
gunichar wc)
{
ClutterTextPrivate *priv;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
priv->priv_char = wc;
if (priv->text_visible)
{
clutter_text_dirty_cache (self);
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
}
g_object_notify (G_OBJECT (self), "invisible-char");
}
/**
* clutter_text_get_invisible_char:
* @self: a #ClutterText
*
* Returns the character to use in place of the actual text when
* the #ClutterText:text-visibility property is set to %FALSE.
*
* Return value: a Unicode character
*
* Since: 1.0
*/
gunichar
clutter_text_get_invisible_char (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), '*');
return self->priv->priv_char;
}
/**
* clutter_text_set_max_length:
* @self: a #ClutterText
* @max: the maximum number of characters allowed in the text actor; 0
* to disable or -1 to set the length of the current string
*
* Sets the maximum allowed length of the contents of the actor. If the
* current contents are longer than the given length, then they will be
* truncated to fit.
*
* Since: 1.0
*/
void
clutter_text_set_max_length (ClutterText *self,
gint max)
{
ClutterTextPrivate *priv;
gchar *new = NULL;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (priv->max_length != max)
{
if (max < 0)
max = g_utf8_strlen (priv->text, -1);
priv->max_length = max;
new = g_strdup (priv->text);
clutter_text_set_text (self, new);
g_free (new);
g_object_notify (G_OBJECT (self), "max-length");
}
}
/**
* clutter_text_get_max_length:
* @self: a #ClutterText
*
* Gets the maximum length of text that can be set into a text actor.
*
* See clutter_text_set_max_length().
*
* Return value: the maximum number of characters.
*
* Since: 1.0
*/
gint
clutter_text_get_max_length (ClutterText *self)
{
g_return_val_if_fail (CLUTTER_IS_TEXT (self), 0);
return self->priv->max_length;
}
/**
* clutter_text_insert_unichar:
* @self: a #ClutterText
* @wc: a Unicode character
*
* Inserts @wc at the current cursor position of a
* #ClutterText actor.
*
* Since: 1.0
*/
void
clutter_text_insert_unichar (ClutterText *self,
gunichar wc)
{
ClutterTextPrivate *priv;
GString *new = NULL;
glong pos;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (g_unichar_validate (wc));
if (wc == 0)
return;
priv = self->priv;
new = g_string_new (priv->text);
if (priv->text)
pos = offset_to_bytes (priv->text, priv->position);
else
pos = 0;
new = g_string_insert_unichar (new, pos, wc);
clutter_text_set_text (self, new->str);
if (priv->position >= 0)
{
clutter_text_set_cursor_position (self, priv->position + 1);
clutter_text_set_selection_bound (self, priv->position);
}
g_string_free (new, TRUE);
}
/**
* clutter_text_insert_text:
* @self: a #ClutterText
* @text: the text to be inserted
* @position: the position of the insertion, or -1
*
* Inserts @text into a #ClutterActor at the given position.
*
* If @position is a negative number, the text will be appended
* at the end of the current contents of the #ClutterText.
*
* The position is expressed in characters, not in bytes.
*
* Since: 1.0
*/
void
clutter_text_insert_text (ClutterText *self,
const gchar *text,
gssize position)
{
ClutterTextPrivate *priv;
GString *new = NULL;
g_return_if_fail (CLUTTER_IS_TEXT (self));
g_return_if_fail (text != NULL);
priv = self->priv;
new = g_string_new (priv->text);
new = g_string_insert (new, position, text);
clutter_text_set_text (self, new->str);
g_string_free (new, TRUE);
}
/**
* clutter_text_delete_text:
* @self: a #ClutterText
* @start_pos: starting position
* @end_pos: ending position
*
* Deletes the text inside a #ClutterText actor between @start_pos
* and @end_pos.
*
* The starting and ending positions are expressed in characters,
* not in bytes.
*
* Since: 1.0
*/
void
clutter_text_delete_text (ClutterText *self,
gssize start_pos,
gssize end_pos)
{
ClutterTextPrivate *priv;
GString *new = NULL;
gint start_bytes;
gint end_bytes;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (!priv->text)
return;
if (end_pos == -1)
{
start_bytes = offset_to_bytes (priv->text,
g_utf8_strlen (priv->text, -1) - 1);
end_bytes = offset_to_bytes (priv->text,
g_utf8_strlen (priv->text, -1));
}
else
{
start_bytes = offset_to_bytes (priv->text, start_pos);
end_bytes = offset_to_bytes (priv->text, end_pos);
}
new = g_string_new (priv->text);
new = g_string_erase (new, start_bytes, end_bytes - start_bytes);
clutter_text_set_text (self, new->str);
g_string_free (new, TRUE);
}
/**
* clutter_text_delete_chars:
* @self: a #ClutterText
* @n_chars: the number of characters to delete
*
* Deletes @n_chars inside a #ClutterText actor, starting from the
* current cursor position.
*
* Since: 1.0
*/
void
clutter_text_delete_chars (ClutterText *self,
guint n_chars)
{
ClutterTextPrivate *priv;
GString *new = NULL;
gint len;
gint pos;
gint num_pos;
g_return_if_fail (CLUTTER_IS_TEXT (self));
priv = self->priv;
if (!priv->text)
return;
len = g_utf8_strlen (priv->text, -1);
new = g_string_new (priv->text);
if (priv->position == -1)
{
num_pos = offset_to_bytes (priv->text, priv->n_chars - n_chars);
new = g_string_erase (new, num_pos, -1);
}
else
{
pos = offset_to_bytes (priv->text, priv->position - n_chars);
num_pos = offset_to_bytes (priv->text, priv->position);
new = g_string_erase (new, pos, num_pos - pos);
}
clutter_text_set_text (self, new->str);
if (priv->position > 0)
clutter_text_set_cursor_position (self, priv->position - n_chars);
g_string_free (new, TRUE);
g_object_notify (G_OBJECT (self), "text");
}
/**
* clutter_text_get_chars:
* @self: a #ClutterText
* @start_pos: start of text, in characters
* @end_pos: end of text, in characters
*
* Retrieves the contents of the #ClutterText actor between
* @start_pos and @end_pos.
*
* The positions are specified in characters, not in bytes.
*
* Return value: a newly allocated string with the contents of
* the text actor between the specified positions. Use g_free()
* to free the resources when done
*
* Since: 1.0
*/
gchar *
clutter_text_get_chars (ClutterText *self,
gssize start_pos,
gssize end_pos)
{
ClutterTextPrivate *priv;
gint start_index, end_index;
g_return_val_if_fail (CLUTTER_IS_TEXT (self), NULL);
priv = self->priv;
if (end_pos < 0)
end_pos = priv->n_chars;
start_pos = MIN (priv->n_chars, start_pos);
end_pos = MIN (priv->n_chars, end_pos);
start_index = g_utf8_offset_to_pointer (priv->text, start_pos)
- priv->text;
end_index = g_utf8_offset_to_pointer (priv->text, end_pos)
- priv->text;
return g_strndup (priv->text + start_index, end_index - start_index);
}
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