forked from AuroraMiddleware/gtk
d399a4acab
This now allows text view to render text with alpha values in the text foreground and backgrounds, the work is almost complete, currently the error-underline-color is still a GdkColor style property and since we use only GdkRGBA for rendering it needs to be converted and applied, probably a new rgba version of the style property should also be introduced. This commit adds tests/testtextview that must be run from the tests/ directory to show translucent text in action.
407 lines
11 KiB
C
407 lines
11 KiB
C
/* gtktextattributes.c - text attributes
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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* Copyright (c) 2000 Red Hat, Inc.
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* Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
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*
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* This software is copyrighted by the Regents of the University of
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* California, Sun Microsystems, Inc., and other parties. The
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* following terms apply to all files associated with the software
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* unless explicitly disclaimed in individual files.
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*
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* The authors hereby grant permission to use, copy, modify,
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* distribute, and license this software and its documentation for any
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* purpose, provided that existing copyright notices are retained in
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* all copies and that this notice is included verbatim in any
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* distributions. No written agreement, license, or royalty fee is
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* required for any of the authorized uses. Modifications to this
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* software may be copyrighted by their authors and need not follow
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* the licensing terms described here, provided that the new terms are
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* clearly indicated on the first page of each file where they apply.
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*
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* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
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* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
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* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* GOVERNMENT USE: If you are acquiring this software on behalf of the
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* U.S. government, the Government shall have only "Restricted Rights"
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* in the software and related documentation as defined in the Federal
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* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
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* are acquiring the software on behalf of the Department of Defense,
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* the software shall be classified as "Commercial Computer Software"
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* and the Government shall have only "Restricted Rights" as defined
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* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
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* foregoing, the authors grant the U.S. Government and others acting
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* in its behalf permission to use and distribute the software in
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* accordance with the terms specified in this license.
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*
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*/
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#include "config.h"
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#include "gtktextattributes.h"
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#include "gtkmainprivate.h"
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#include "gtktexttag.h"
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#include "gtktexttypes.h"
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/**
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* gtk_text_attributes_new:
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*
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* Creates a #GtkTextAttributes, which describes
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* a set of properties on some text.
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*
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* Return value: a new #GtkTextAttributes,
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* free with gtk_text_attributes_unref().
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*/
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GtkTextAttributes*
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gtk_text_attributes_new (void)
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{
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GtkTextAttributes *values;
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values = g_slice_new0 (GtkTextAttributes);
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/* 0 is a valid value for most of the struct */
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values->refcount = 1;
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values->language = gtk_get_default_language ();
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values->font_scale = 1.0;
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values->editable = TRUE;
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return values;
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}
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/**
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* gtk_text_attributes_copy:
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* @src: a #GtkTextAttributes to be copied
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*
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* Copies @src and returns a new #GtkTextAttributes.
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*
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* Return value: a copy of @src,
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* free with gtk_text_attributes_unref()
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*/
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GtkTextAttributes*
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gtk_text_attributes_copy (GtkTextAttributes *src)
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{
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GtkTextAttributes *dest;
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dest = gtk_text_attributes_new ();
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gtk_text_attributes_copy_values (src, dest);
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return dest;
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}
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G_DEFINE_BOXED_TYPE (GtkTextAttributes, gtk_text_attributes,
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gtk_text_attributes_ref,
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gtk_text_attributes_unref)
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/**
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* gtk_text_attributes_copy_values:
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* @src: a #GtkTextAttributes
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* @dest: another #GtkTextAttributes
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*
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* Copies the values from @src to @dest so that @dest has
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* the same values as @src. Frees existing values in @dest.
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*/
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void
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gtk_text_attributes_copy_values (GtkTextAttributes *src,
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GtkTextAttributes *dest)
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{
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guint orig_refcount;
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if (src == dest)
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return;
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/* Remove refs */
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if (dest->tabs)
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pango_tab_array_free (dest->tabs);
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if (dest->font)
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pango_font_description_free (dest->font);
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if (dest->pg_bg_color)
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gdk_color_free (dest->pg_bg_color);
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if (dest->pg_bg_rgba)
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gdk_rgba_free (dest->pg_bg_rgba);
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if (dest->appearance.rgba[0])
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gdk_rgba_free (dest->appearance.rgba[0]);
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if (dest->appearance.rgba[1])
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gdk_rgba_free (dest->appearance.rgba[1]);
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/* Copy */
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orig_refcount = dest->refcount;
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*dest = *src;
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if (src->tabs)
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dest->tabs = pango_tab_array_copy (src->tabs);
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dest->language = src->language;
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if (src->font)
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dest->font = pango_font_description_copy (src->font);
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if (src->pg_bg_color)
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dest->pg_bg_color = gdk_color_copy (src->pg_bg_color);
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if (src->pg_bg_rgba)
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dest->pg_bg_rgba = gdk_rgba_copy (src->pg_bg_rgba);
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if (src->appearance.rgba[0])
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dest->appearance.rgba[0] = gdk_rgba_copy (src->appearance.rgba[0]);
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if (src->appearance.rgba[1])
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dest->appearance.rgba[1] = gdk_rgba_copy (src->appearance.rgba[1]);
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dest->refcount = orig_refcount;
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}
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/**
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* gtk_text_attributes_ref:
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* @values: a #GtkTextAttributes
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*
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* Increments the reference count on @values.
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*
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* Returns: the #GtkTextAttributes that were passed in
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**/
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GtkTextAttributes *
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gtk_text_attributes_ref (GtkTextAttributes *values)
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{
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g_return_val_if_fail (values != NULL, NULL);
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values->refcount += 1;
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return values;
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}
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/**
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* gtk_text_attributes_unref:
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* @values: a #GtkTextAttributes
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*
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* Decrements the reference count on @values, freeing the structure
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* if the reference count reaches 0.
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**/
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void
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gtk_text_attributes_unref (GtkTextAttributes *values)
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{
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g_return_if_fail (values != NULL);
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g_return_if_fail (values->refcount > 0);
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values->refcount -= 1;
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if (values->refcount == 0)
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{
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if (values->tabs)
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pango_tab_array_free (values->tabs);
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if (values->font)
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pango_font_description_free (values->font);
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if (values->pg_bg_color)
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gdk_color_free (values->pg_bg_color);
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if (values->pg_bg_rgba)
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gdk_rgba_free (values->pg_bg_rgba);
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if (values->appearance.rgba[0])
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gdk_rgba_free (values->appearance.rgba[0]);
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if (values->appearance.rgba[1])
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gdk_rgba_free (values->appearance.rgba[1]);
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g_slice_free (GtkTextAttributes, values);
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}
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}
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void
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_gtk_text_attributes_fill_from_tags (GtkTextAttributes *dest,
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GtkTextTag** tags,
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guint n_tags)
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{
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guint n = 0;
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guint left_margin_accumulative = 0;
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guint right_margin_accumulative = 0;
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while (n < n_tags)
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{
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GtkTextTag *tag = tags[n];
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GtkTextAttributes *vals = tag->priv->values;
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g_assert (tag->priv->table != NULL);
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if (n > 0)
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g_assert (tags[n]->priv->priority > tags[n-1]->priv->priority);
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if (tag->priv->bg_color_set)
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{
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if (dest->appearance.rgba[0])
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{
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gdk_rgba_free (dest->appearance.rgba[0]);
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dest->appearance.rgba[0] = NULL;
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}
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if (vals->appearance.rgba[0])
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dest->appearance.rgba[0] = gdk_rgba_copy (vals->appearance.rgba[0]);
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dest->appearance.draw_bg = TRUE;
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}
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if (tag->priv->fg_color_set)
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{
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if (dest->appearance.rgba[1])
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{
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gdk_rgba_free (dest->appearance.rgba[1]);
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dest->appearance.rgba[1] = NULL;
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}
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if (vals->appearance.rgba[1])
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dest->appearance.rgba[1] = gdk_rgba_copy (vals->appearance.rgba[1]);
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}
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if (tag->priv->pg_bg_color_set)
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{
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if (dest->pg_bg_rgba)
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{
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gdk_rgba_free (dest->pg_bg_rgba);
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dest->pg_bg_rgba = NULL;
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}
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if (vals->pg_bg_rgba)
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dest->pg_bg_rgba = gdk_rgba_copy (vals->pg_bg_rgba);
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}
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if (vals->font)
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{
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if (dest->font)
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pango_font_description_merge (dest->font, vals->font, TRUE);
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else
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dest->font = pango_font_description_copy (vals->font);
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}
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/* multiply all the scales together to get a composite */
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if (tag->priv->scale_set)
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dest->font_scale *= vals->font_scale;
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if (tag->priv->justification_set)
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dest->justification = vals->justification;
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if (vals->direction != GTK_TEXT_DIR_NONE)
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dest->direction = vals->direction;
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if (tag->priv->left_margin_set)
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{
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if (tag->priv->accumulative_margin)
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left_margin_accumulative += vals->left_margin;
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else
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dest->left_margin = vals->left_margin;
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}
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if (tag->priv->indent_set)
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dest->indent = vals->indent;
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if (tag->priv->rise_set)
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dest->appearance.rise = vals->appearance.rise;
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if (tag->priv->right_margin_set)
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{
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if (tag->priv->accumulative_margin)
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right_margin_accumulative += vals->right_margin;
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else
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dest->right_margin = vals->right_margin;
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}
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if (tag->priv->pixels_above_lines_set)
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dest->pixels_above_lines = vals->pixels_above_lines;
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if (tag->priv->pixels_below_lines_set)
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dest->pixels_below_lines = vals->pixels_below_lines;
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if (tag->priv->pixels_inside_wrap_set)
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dest->pixels_inside_wrap = vals->pixels_inside_wrap;
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if (tag->priv->tabs_set)
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{
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if (dest->tabs)
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pango_tab_array_free (dest->tabs);
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dest->tabs = pango_tab_array_copy (vals->tabs);
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}
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if (tag->priv->wrap_mode_set)
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dest->wrap_mode = vals->wrap_mode;
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if (tag->priv->underline_set)
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dest->appearance.underline = vals->appearance.underline;
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if (tag->priv->strikethrough_set)
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dest->appearance.strikethrough = vals->appearance.strikethrough;
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if (tag->priv->invisible_set)
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dest->invisible = vals->invisible;
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if (tag->priv->editable_set)
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dest->editable = vals->editable;
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if (tag->priv->bg_full_height_set)
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dest->bg_full_height = vals->bg_full_height;
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if (tag->priv->language_set)
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dest->language = vals->language;
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++n;
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}
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dest->left_margin += left_margin_accumulative;
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dest->right_margin += right_margin_accumulative;
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}
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gboolean
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_gtk_text_tag_affects_size (GtkTextTag *tag)
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{
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GtkTextTagPrivate *priv = tag->priv;
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return
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(priv->values->font && pango_font_description_get_set_fields (priv->values->font) != 0) ||
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priv->scale_set ||
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priv->justification_set ||
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priv->left_margin_set ||
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priv->indent_set ||
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priv->rise_set ||
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priv->right_margin_set ||
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priv->pixels_above_lines_set ||
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priv->pixels_below_lines_set ||
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priv->pixels_inside_wrap_set ||
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priv->tabs_set ||
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priv->underline_set ||
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priv->wrap_mode_set ||
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priv->invisible_set;
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}
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gboolean
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_gtk_text_tag_affects_nonsize_appearance (GtkTextTag *tag)
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{
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GtkTextTagPrivate *priv = tag->priv;
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return
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priv->bg_color_set ||
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priv->fg_color_set ||
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priv->strikethrough_set ||
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priv->bg_full_height_set ||
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priv->pg_bg_color_set;
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}
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