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89b20b63cd08761e3802b0504c89e2a3db6ed753
gtk3/gtk/gtktextattributes.c
Matthias Clasen c6838fbff0 GtkTextView: Support font features 
Add a ::font-features attribute to GtkTextTag, and support
font features when inserting Pango markup into a text buffer.
2015-07-29 21:42:58 -04:00

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/* gtktextattributes.c - text attributes
*
* Copyright (c) 1992-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
* Copyright (c) 2000 Red Hat, Inc.
* Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
*
* This software is copyrighted by the Regents of the University of
* California, Sun Microsystems, Inc., and other parties. The
* following terms apply to all files associated with the software
* unless explicitly disclaimed in individual files.
*
* The authors hereby grant permission to use, copy, modify,
* distribute, and license this software and its documentation for any
* purpose, provided that existing copyright notices are retained in
* all copies and that this notice is included verbatim in any
* distributions. No written agreement, license, or royalty fee is
* required for any of the authorized uses. Modifications to this
* software may be copyrighted by their authors and need not follow
* the licensing terms described here, provided that the new terms are
* clearly indicated on the first page of each file where they apply.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* GOVERNMENT USE: If you are acquiring this software on behalf of the
* U.S. government, the Government shall have only "Restricted Rights"
* in the software and related documentation as defined in the Federal
* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
* are acquiring the software on behalf of the Department of Defense,
* the software shall be classified as "Commercial Computer Software"
* and the Government shall have only "Restricted Rights" as defined
* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
* foregoing, the authors grant the U.S. Government and others acting
* in its behalf permission to use and distribute the software in
* accordance with the terms specified in this license.
*
*/
#include "config.h"
#include "gtktextattributes.h"
#include "gtktextattributesprivate.h"
#include "gtktexttagprivate.h"
/**
* gtk_text_attributes_new:
*
* Creates a #GtkTextAttributes, which describes
* a set of properties on some text.
*
* Returns: a new #GtkTextAttributes,
* free with gtk_text_attributes_unref().
*/
GtkTextAttributes*
gtk_text_attributes_new (void)
{
GtkTextAttributes *values;
values = g_slice_new0 (GtkTextAttributes);
/* 0 is a valid value for most of the struct */
values->refcount = 1;
values->language = gtk_get_default_language ();
values->font_scale = 1.0;
values->editable = TRUE;
return values;
}
/**
* gtk_text_attributes_copy:
* @src: a #GtkTextAttributes to be copied
*
* Copies @src and returns a new #GtkTextAttributes.
*
* Returns: a copy of @src,
* free with gtk_text_attributes_unref()
*/
GtkTextAttributes*
gtk_text_attributes_copy (GtkTextAttributes *src)
{
GtkTextAttributes *dest;
dest = gtk_text_attributes_new ();
gtk_text_attributes_copy_values (src, dest);
return dest;
}
G_DEFINE_BOXED_TYPE (GtkTextAttributes, gtk_text_attributes,
gtk_text_attributes_ref,
gtk_text_attributes_unref)
/**
* gtk_text_attributes_copy_values:
* @src: a #GtkTextAttributes
* @dest: another #GtkTextAttributes
*
* Copies the values from @src to @dest so that @dest has
* the same values as @src. Frees existing values in @dest.
*/
void
gtk_text_attributes_copy_values (GtkTextAttributes *src,
GtkTextAttributes *dest)
{
guint orig_refcount;
if (src == dest)
return;
/* Remove refs */
if (dest->tabs)
pango_tab_array_free (dest->tabs);
if (dest->font)
pango_font_description_free (dest->font);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (dest->pg_bg_color)
gdk_color_free (dest->pg_bg_color);
G_GNUC_END_IGNORE_DEPRECATIONS
if (dest->pg_bg_rgba)
gdk_rgba_free (dest->pg_bg_rgba);
if (dest->appearance.rgba[0])
gdk_rgba_free (dest->appearance.rgba[0]);
if (dest->appearance.rgba[1])
gdk_rgba_free (dest->appearance.rgba[1]);
if (dest->font_features)
g_free (dest->font_features);
/* Copy */
orig_refcount = dest->refcount;
*dest = *src;
if (src->tabs)
dest->tabs = pango_tab_array_copy (src->tabs);
dest->language = src->language;
if (src->font)
dest->font = pango_font_description_copy (src->font);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (src->pg_bg_color)
dest->pg_bg_color = gdk_color_copy (src->pg_bg_color);
G_GNUC_END_IGNORE_DEPRECATIONS
if (src->pg_bg_rgba)
dest->pg_bg_rgba = gdk_rgba_copy (src->pg_bg_rgba);
if (src->appearance.rgba[0])
dest->appearance.rgba[0] = gdk_rgba_copy (src->appearance.rgba[0]);
if (src->appearance.rgba[1])
dest->appearance.rgba[1] = gdk_rgba_copy (src->appearance.rgba[1]);
if (src->font_features)
dest->font_features = g_strdup (src->font_features);
dest->refcount = orig_refcount;
}
/**
* gtk_text_attributes_ref:
* @values: a #GtkTextAttributes
*
* Increments the reference count on @values.
*
* Returns: the #GtkTextAttributes that were passed in
**/
GtkTextAttributes *
gtk_text_attributes_ref (GtkTextAttributes *values)
{
g_return_val_if_fail (values != NULL, NULL);
values->refcount += 1;
return values;
}
/**
* gtk_text_attributes_unref:
* @values: a #GtkTextAttributes
*
* Decrements the reference count on @values, freeing the structure
* if the reference count reaches 0.
**/
void
gtk_text_attributes_unref (GtkTextAttributes *values)
{
g_return_if_fail (values != NULL);
g_return_if_fail (values->refcount > 0);
values->refcount -= 1;
if (values->refcount == 0)
{
if (values->tabs)
pango_tab_array_free (values->tabs);
if (values->font)
pango_font_description_free (values->font);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (values->pg_bg_color)
gdk_color_free (values->pg_bg_color);
G_GNUC_END_IGNORE_DEPRECATIONS
if (values->pg_bg_rgba)
gdk_rgba_free (values->pg_bg_rgba);
if (values->appearance.rgba[0])
gdk_rgba_free (values->appearance.rgba[0]);
if (values->appearance.rgba[1])
gdk_rgba_free (values->appearance.rgba[1]);
if (values->font_features)
g_free (values->font_features);
g_slice_free (GtkTextAttributes, values);
}
}
void
_gtk_text_attributes_fill_from_tags (GtkTextAttributes *dest,
GtkTextTag** tags,
guint n_tags)
{
guint n = 0;
guint left_margin_accumulative = 0;
guint right_margin_accumulative = 0;
while (n < n_tags)
{
GtkTextTag *tag = tags[n];
GtkTextAttributes *vals = tag->priv->values;
g_assert (tag->priv->table != NULL);
if (n > 0)
g_assert (tags[n]->priv->priority > tags[n-1]->priv->priority);
if (tag->priv->bg_color_set)
{
if (dest->appearance.rgba[0])
{
gdk_rgba_free (dest->appearance.rgba[0]);
dest->appearance.rgba[0] = NULL;
}
if (vals->appearance.rgba[0])
dest->appearance.rgba[0] = gdk_rgba_copy (vals->appearance.rgba[0]);
dest->appearance.draw_bg = TRUE;
}
if (tag->priv->fg_color_set)
{
if (dest->appearance.rgba[1])
{
gdk_rgba_free (dest->appearance.rgba[1]);
dest->appearance.rgba[1] = NULL;
}
if (vals->appearance.rgba[1])
dest->appearance.rgba[1] = gdk_rgba_copy (vals->appearance.rgba[1]);
}
if (tag->priv->pg_bg_color_set)
{
if (dest->pg_bg_rgba)
{
gdk_rgba_free (dest->pg_bg_rgba);
dest->pg_bg_rgba = NULL;
}
if (dest->pg_bg_color)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gdk_color_free (dest->pg_bg_color);
dest->pg_bg_color = NULL;
G_GNUC_END_IGNORE_DEPRECATIONS
}
if (vals->pg_bg_rgba)
dest->pg_bg_rgba = gdk_rgba_copy (vals->pg_bg_rgba);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (vals->pg_bg_color)
dest->pg_bg_color = gdk_color_copy (vals->pg_bg_color);
G_GNUC_END_IGNORE_DEPRECATIONS
}
if (vals->font)
{
if (dest->font)
pango_font_description_merge (dest->font, vals->font, TRUE);
else
dest->font = pango_font_description_copy (vals->font);
}
/* multiply all the scales together to get a composite */
if (tag->priv->scale_set)
dest->font_scale *= vals->font_scale;
if (tag->priv->justification_set)
dest->justification = vals->justification;
if (vals->direction != GTK_TEXT_DIR_NONE)
dest->direction = vals->direction;
if (tag->priv->left_margin_set)
{
if (tag->priv->accumulative_margin)
left_margin_accumulative += vals->left_margin;
else
dest->left_margin = vals->left_margin;
}
if (tag->priv->indent_set)
dest->indent = vals->indent;
if (tag->priv->rise_set)
dest->appearance.rise = vals->appearance.rise;
if (tag->priv->right_margin_set)
{
if (tag->priv->accumulative_margin)
right_margin_accumulative += vals->right_margin;
else
dest->right_margin = vals->right_margin;
}
if (tag->priv->pixels_above_lines_set)
dest->pixels_above_lines = vals->pixels_above_lines;
if (tag->priv->pixels_below_lines_set)
dest->pixels_below_lines = vals->pixels_below_lines;
if (tag->priv->pixels_inside_wrap_set)
dest->pixels_inside_wrap = vals->pixels_inside_wrap;
if (tag->priv->tabs_set)
{
if (dest->tabs)
pango_tab_array_free (dest->tabs);
dest->tabs = pango_tab_array_copy (vals->tabs);
}
if (tag->priv->wrap_mode_set)
dest->wrap_mode = vals->wrap_mode;
if (tag->priv->underline_set)
dest->appearance.underline = vals->appearance.underline;
if (GTK_TEXT_APPEARANCE_GET_UNDERLINE_RGBA_SET (&vals->appearance))
{
GdkRGBA rgba;
GTK_TEXT_APPEARANCE_GET_UNDERLINE_RGBA (&vals->appearance, &rgba);
GTK_TEXT_APPEARANCE_SET_UNDERLINE_RGBA (&dest->appearance, &rgba);
GTK_TEXT_APPEARANCE_SET_UNDERLINE_RGBA_SET (&dest->appearance, TRUE);
}
if (tag->priv->strikethrough_set)
dest->appearance.strikethrough = vals->appearance.strikethrough;
if (GTK_TEXT_APPEARANCE_GET_STRIKETHROUGH_RGBA_SET (&vals->appearance))
{
GdkRGBA rgba;
GTK_TEXT_APPEARANCE_GET_STRIKETHROUGH_RGBA (&vals->appearance, &rgba);
GTK_TEXT_APPEARANCE_SET_STRIKETHROUGH_RGBA (&dest->appearance, &rgba);
GTK_TEXT_APPEARANCE_SET_STRIKETHROUGH_RGBA_SET (&dest->appearance, TRUE);
}
if (tag->priv->invisible_set)
dest->invisible = vals->invisible;
if (tag->priv->editable_set)
dest->editable = vals->editable;
if (tag->priv->bg_full_height_set)
dest->bg_full_height = vals->bg_full_height;
if (tag->priv->language_set)
dest->language = vals->language;
if (tag->priv->fallback_set)
dest->no_fallback = vals->no_fallback;
if (tag->priv->letter_spacing_set)
dest->letter_spacing = vals->letter_spacing;
if (tag->priv->font_features_set)
dest->font_features = g_strdup (vals->font_features);
++n;
}
dest->left_margin += left_margin_accumulative;
dest->right_margin += right_margin_accumulative;
}
gboolean
_gtk_text_tag_affects_size (GtkTextTag *tag)
{
GtkTextTagPrivate *priv = tag->priv;
return
(priv->values->font && pango_font_description_get_set_fields (priv->values->font) != 0) ||
priv->scale_set ||
priv->justification_set ||
priv->left_margin_set ||
priv->indent_set ||
priv->rise_set ||
priv->right_margin_set ||
priv->pixels_above_lines_set ||
priv->pixels_below_lines_set ||
priv->pixels_inside_wrap_set ||
priv->tabs_set ||
priv->underline_set ||
priv->wrap_mode_set ||
priv->invisible_set ||
priv->font_features_set ||
priv->letter_spacing_set;
}
gboolean
_gtk_text_tag_affects_nonsize_appearance (GtkTextTag *tag)
{
GtkTextTagPrivate *priv = tag->priv;
return
priv->bg_color_set ||
priv->fg_color_set ||
priv->strikethrough_set ||
priv->bg_full_height_set ||
priv->pg_bg_color_set ||
priv->fallback_set ||
GTK_TEXT_APPEARANCE_GET_UNDERLINE_RGBA_SET (&priv->values->appearance) ||
GTK_TEXT_APPEARANCE_GET_STRIKETHROUGH_RGBA_SET (&priv->values->appearance);
}
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