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gnome-shell/src/st/st-private.c

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Add emacs mode-lines to ST sources To each .c and .h file, add: /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ 'gnu' is the default anyways for Emacs, but indent-tabs-mode is not, so this sets things up to correspond to the policy of no-tabs. http://bugzilla.moblin.org/show_bug.cgi?id=6467
2009-09-29 19:08:01 +00:00
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
[StThemeNode] Make shadow helper functions semi-public Move shadow helper functions from st-theme-node-drawing to st-private to make them available to widgets which want to add shadows to internal actors. Also add a new helper function for creating the shadow material from a ClutterActor. https://bugzilla.gnome.org/show_bug.cgi?id=624384
2010-07-24 15:41:25 +00:00
#include <math.h>
#include <string.h>
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
#include "st-private.h"
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
/**
* _st_actor_get_preferred_width:
* @actor: a #ClutterActor
* @for_height: as with clutter_actor_get_preferred_width()
* @y_fill: %TRUE if @actor will fill its allocation vertically
* @min_width_p: as with clutter_actor_get_preferred_width()
* @natural_width_p: as with clutter_actor_get_preferred_width()
*
* Like clutter_actor_get_preferred_width(), but if @y_fill is %FALSE,
* then it will compute a width request based on the assumption that
* @actor will be given an allocation no taller than its natural
* height.
*/
void
_st_actor_get_preferred_width (ClutterActor *actor,
gfloat for_height,
gboolean y_fill,
gfloat *min_width_p,
gfloat *natural_width_p)
{
if (!y_fill && for_height != -1)
{
ClutterRequestMode mode;
gfloat natural_height;
g_object_get (G_OBJECT (actor), "request-mode", &mode, NULL);
if (mode == CLUTTER_REQUEST_WIDTH_FOR_HEIGHT)
{
clutter_actor_get_preferred_height (actor, -1, NULL, &natural_height);
if (for_height > natural_height)
for_height = natural_height;
}
}
clutter_actor_get_preferred_width (actor, for_height, min_width_p, natural_width_p);
}
/**
* _st_actor_get_preferred_height:
* @actor: a #ClutterActor
* @for_width: as with clutter_actor_get_preferred_height()
* @x_fill: %TRUE if @actor will fill its allocation horizontally
* @min_height_p: as with clutter_actor_get_preferred_height()
* @natural_height_p: as with clutter_actor_get_preferred_height()
*
* Like clutter_actor_get_preferred_height(), but if @x_fill is
* %FALSE, then it will compute a height request based on the
* assumption that @actor will be given an allocation no wider than
* its natural width.
*/
void
_st_actor_get_preferred_height (ClutterActor *actor,
gfloat for_width,
gboolean x_fill,
gfloat *min_height_p,
gfloat *natural_height_p)
{
if (!x_fill && for_width != -1)
{
ClutterRequestMode mode;
gfloat natural_width;
g_object_get (G_OBJECT (actor), "request-mode", &mode, NULL);
if (mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
clutter_actor_get_preferred_width (actor, -1, NULL, &natural_width);
if (for_width > natural_width)
for_width = natural_width;
}
}
clutter_actor_get_preferred_height (actor, for_width, min_height_p, natural_height_p);
}
/**
* _st_allocate_fill:
* @parent: the parent #StWidget
* @child: the child (not necessarily an #StWidget)
* @childbox: total space that could be allocated to @child
* @x_alignment: horizontal alignment within @childbox
* @y_alignment: vertical alignment within @childbox
* @x_fill: whether or not to fill @childbox horizontally
* @y_fill: whether or not to fill @childbox vertically
*
* Given @childbox, containing the initial allocation of @child, this
* adjusts the horizontal allocation if @x_fill is %FALSE, and the
* vertical allocation if @y_fill is %FALSE, by:
*
* - reducing the allocation if it is larger than @child's natural
* size.
*
* - adjusting the position of the child within the allocation
* according to @x_alignment/@y_alignment (and flipping
* @x_alignment if @parent has %ST_TEXT_DIRECTION_RTL)
*
* If @x_fill and @y_fill are both %TRUE, or if @child's natural size
* is larger than the initial allocation in @childbox, then @childbox
* will be unchanged.
*
* If you are allocating children with _st_allocate_fill(), you should
* determine their preferred sizes using
* _st_actor_get_preferred_width() and
* _st_actor_get_preferred_height(), not with the corresponding
* Clutter methods.
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
*/
void
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
_st_allocate_fill (StWidget *parent,
ClutterActor *child,
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
ClutterActorBox *childbox,
StAlign x_alignment,
StAlign y_alignment,
gboolean x_fill,
gboolean y_fill)
{
gfloat natural_width, natural_height;
gfloat min_width, min_height;
gfloat child_width, child_height;
gfloat available_width, available_height;
ClutterRequestMode request;
gdouble x_align, y_align;
available_width = childbox->x2 - childbox->x1;
available_height = childbox->y2 - childbox->y1;
if (available_width < 0)
{
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
available_width = 0;
childbox->x2 = childbox->x1;
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
}
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
if (available_height < 0)
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
{
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
available_height = 0;
childbox->y2 = childbox->y1;
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
}
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
/* If we are filling both horizontally and vertically then we don't
* need to do anything else.
*/
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
if (x_fill && y_fill)
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
return;
_st_get_align_factors (parent, x_alignment, y_alignment,
&x_align, &y_align);
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
/* The following is based on clutter_actor_get_preferred_size(), but
* modified to cope with the fact that the available size may be
* less than the preferred size.
*/
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
request = CLUTTER_REQUEST_HEIGHT_FOR_WIDTH;
g_object_get (G_OBJECT (child), "request-mode", &request, NULL);
if (request == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
St: fix allocation to not use both wfh and hfw Passing an explicit width in the wfh case or a height in the hfw case messes up the request caching, and confuses actors that assume they won't be called with an explicit width/height unless they're being allocated along the other axis. https://bugzilla.gnome.org/show_bug.cgi?id=618295
2010-05-11 18:46:26 +00:00
clutter_actor_get_preferred_width (child, -1,
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
&min_width,
&natural_width);
child_width = CLAMP (natural_width, min_width, available_width);
clutter_actor_get_preferred_height (child, child_width,
&min_height,
&natural_height);
child_height = CLAMP (natural_height, min_height, available_height);
}
else
{
St: fix allocation to not use both wfh and hfw Passing an explicit width in the wfh case or a height in the hfw case messes up the request caching, and confuses actors that assume they won't be called with an explicit width/height unless they're being allocated along the other axis. https://bugzilla.gnome.org/show_bug.cgi?id=618295
2010-05-11 18:46:26 +00:00
clutter_actor_get_preferred_height (child, -1,
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
&min_height,
&natural_height);
child_height = CLAMP (natural_height, min_height, available_height);
clutter_actor_get_preferred_width (child, child_height,
&min_width,
&natural_width);
child_width = CLAMP (natural_width, min_width, available_width);
}
if (!x_fill)
{
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
childbox->x1 += (int)((available_width - child_width) * x_align);
childbox->x2 = childbox->x1 + (int) child_width;
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
}
if (!y_fill)
{
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
childbox->y1 += (int)((available_height - child_height) * y_align);
childbox->y2 = childbox->y1 + (int) child_height;
}
}
/**
* _st_get_align_factors:
* @widget: an #StWidget
* @x_align: an #StAlign
* @y_align: an #StAlign
* @x_align_out: (out) (allow-none): @x_align as a #gdouble
* @y_align_out: (out) (allow-none): @y_align as a #gdouble
*
* Converts @x_align and @y_align to #gdouble values. If @widget has
* %ST_TEXT_DIRECTION_RTL, the @x_align_out value will be flipped
* relative to @x_align.
*/
void
_st_get_align_factors (StWidget *widget,
StAlign x_align,
StAlign y_align,
gdouble *x_align_out,
gdouble *y_align_out)
{
if (x_align_out)
{
switch (x_align)
{
case ST_ALIGN_START:
*x_align_out = 0.0;
break;
case ST_ALIGN_MIDDLE:
*x_align_out = 0.5;
break;
case ST_ALIGN_END:
*x_align_out = 1.0;
break;
default:
g_warn_if_reached ();
break;
}
if (st_widget_get_direction (widget) == ST_TEXT_DIRECTION_RTL)
*x_align_out = 1.0 - *x_align_out;
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
}
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
if (y_align_out)
{
switch (y_align)
{
case ST_ALIGN_START:
*y_align_out = 0.0;
break;
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
[St] Make allocation handling more consistent In StBin, StBoxLayout, and StTable, if a child has a potential allocation that is larger than its preferred size, we give it its preferred size instead. However, the corresponding get_preferred_height/width methods were not making the same assumption, which meant that if we had more width than the widget wanted, we would allocate it its preferred width, but with the height that corresponded to the larger width. Fix this by defining new helpers _st_actor_get_preferred_width() and _st_actor_get_preferred_height() and using them everywhere. Also, make StBin and StTable use _st_allocate_fill() rather than having nearly-identical duplicate copies of the code. https://bugzilla.gnome.org/show_bug.cgi?id=609848
2010-02-13 16:24:25 +00:00
case ST_ALIGN_MIDDLE:
*y_align_out = 0.5;
break;
case ST_ALIGN_END:
*y_align_out = 1.0;
break;
default:
g_warn_if_reached ();
break;
}
}
Import Mx core as ST Import the core MxWidget/MxBin and their dependencies; we use the namespace "St" (Shell Toolkit) because it is the same length as Mx so enabling easy sharing of code, but makes it clear that this is a friendly fork and not a literal import. Based on a patch by Colin Walters <walters@verbum.org> https://bugzilla.gnome.org/show_bug.cgi?id=591245
2009-09-08 19:47:30 +00:00
}
[St] Implement text-decoration: [underline|strikethrough] Move CSS handling of StLabel and StButton for their underlying ClutterText objects into st_private, and implement support for the underline and strikethrough St text-decoration properties. Overline isn't implemented for lack of a corresponding Pango attribute, and blink, well... https://bugzilla.gnome.org/show_bug.cgi?id=599661
2009-12-02 19:42:26 +00:00
/**
* _st_set_text_from_style:
* @text: Target #ClutterText
* @theme_node: Source #StThemeNode
*
* Set various GObject properties of the @text object using
* CSS information from @theme_node.
*/
void
_st_set_text_from_style (ClutterText *text,
StThemeNode *theme_node)
{
ClutterColor color;
StTextDecoration decoration;
PangoAttrList *attribs;
const PangoFontDescription *font;
gchar *font_string;
Implement "text-align" "text-align" allows setting the alignment of text, with respect to other lines and allocated space, without requiring a reference to the ClutterText (which is private for most widgets). If not specified, all text is left-aligned. https://bugzilla.gnome.org/show_bug.cgi?id=622447
2010-06-22 20:04:45 +00:00
StTextAlign align;
[St] Implement text-decoration: [underline|strikethrough] Move CSS handling of StLabel and StButton for their underlying ClutterText objects into st_private, and implement support for the underline and strikethrough St text-decoration properties. Overline isn't implemented for lack of a corresponding Pango attribute, and blink, well... https://bugzilla.gnome.org/show_bug.cgi?id=599661
2009-12-02 19:42:26 +00:00
st_theme_node_get_foreground_color (theme_node, &color);
clutter_text_set_color (text, &color);
font = st_theme_node_get_font (theme_node);
font_string = pango_font_description_to_string (font);
clutter_text_set_font_name (text, font_string);
g_free (font_string);
attribs = pango_attr_list_new ();
decoration = st_theme_node_get_text_decoration (theme_node);
if (decoration & ST_TEXT_DECORATION_UNDERLINE)
{
PangoAttribute *underline = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
pango_attr_list_insert (attribs, underline);
}
if (decoration & ST_TEXT_DECORATION_LINE_THROUGH)
{
PangoAttribute *strikethrough = pango_attr_strikethrough_new (TRUE);
pango_attr_list_insert (attribs, strikethrough);
}
/* Pango doesn't have an equivalent attribute for _OVERLINE, and we deliberately
* skip BLINK (for now...)
*/
clutter_text_set_attributes (text, attribs);
pango_attr_list_unref (attribs);
Implement "text-align" "text-align" allows setting the alignment of text, with respect to other lines and allocated space, without requiring a reference to the ClutterText (which is private for most widgets). If not specified, all text is left-aligned. https://bugzilla.gnome.org/show_bug.cgi?id=622447
2010-06-22 20:04:45 +00:00
align = st_theme_node_get_text_align (theme_node);
if(align == ST_TEXT_ALIGN_JUSTIFY) {
clutter_text_set_justify (text, TRUE);
clutter_text_set_line_alignment (text, PANGO_ALIGN_LEFT);
} else {
clutter_text_set_justify (text, FALSE);
clutter_text_set_line_alignment (text, (PangoAlignment) align);
}
[St] Implement text-decoration: [underline|strikethrough] Move CSS handling of StLabel and StButton for their underlying ClutterText objects into st_private, and implement support for the underline and strikethrough St text-decoration properties. Overline isn't implemented for lack of a corresponding Pango attribute, and blink, well... https://bugzilla.gnome.org/show_bug.cgi?id=599661
2009-12-02 19:42:26 +00:00
}
[StThemeNode] Make shadow helper functions semi-public Move shadow helper functions from st-theme-node-drawing to st-private to make them available to widgets which want to add shadows to internal actors. Also add a new helper function for creating the shadow material from a ClutterActor. https://bugzilla.gnome.org/show_bug.cgi?id=624384
2010-07-24 15:41:25 +00:00
/*****
* Shadows
*****/
static gdouble *
calculate_gaussian_kernel (gdouble sigma,
guint n_values)
{
gdouble *ret, sum;
gdouble exp_divisor;
gint half, i;
g_return_val_if_fail (sigma > 0, NULL);
half = n_values / 2;
ret = g_malloc (n_values * sizeof (gdouble));
sum = 0.0;
exp_divisor = 2 * sigma * sigma;
/* n_values of 1D Gauss function */
for (i = 0; i < n_values; i++)
{
ret[i] = exp (-(i - half) * (i - half) / exp_divisor);
sum += ret[i];
}
/* normalize */
for (i = 0; i < n_values; i++)
ret[i] /= sum;
return ret;
}
CoglHandle
_st_create_shadow_material (StShadow *shadow_spec,
CoglHandle src_texture)
{
CoglHandle material;
CoglHandle texture;
guchar *pixels_in, *pixels_out;
gint width_in, height_in, rowstride_in;
gint width_out, height_out, rowstride_out;
float sigma;
g_return_val_if_fail (shadow_spec != NULL, COGL_INVALID_HANDLE);
g_return_val_if_fail (src_texture != COGL_INVALID_HANDLE,
COGL_INVALID_HANDLE);
/* we use an approximation of the sigma - blur radius relationship used
in Firefox for doing SVG blurs; see
http://mxr.mozilla.org/mozilla-central/source/gfx/thebes/src/gfxBlur.cpp#280
*/
sigma = shadow_spec->blur / 1.9;
width_in = cogl_texture_get_width (src_texture);
height_in = cogl_texture_get_height (src_texture);
rowstride_in = (width_in + 3) & ~3;
pixels_in = g_malloc0 (rowstride_in * height_in);
cogl_texture_get_data (src_texture, COGL_PIXEL_FORMAT_A_8,
rowstride_in, pixels_in);
if ((guint) shadow_spec->blur == 0)
{
width_out = width_in;
height_out = height_in;
rowstride_out = rowstride_in;
pixels_out = g_memdup (pixels_in, rowstride_out * height_out);
}
else
{
gdouble *kernel;
guchar *line;
gint n_values, half;
gint x_in, y_in, x_out, y_out, i;
n_values = (gint) 5 * sigma;
half = n_values / 2;
width_out = width_in + 2 * half;
height_out = height_in + 2 * half;
rowstride_out = (width_out + 3) & ~3;
pixels_out = g_malloc0 (rowstride_out * height_out);
line = g_malloc0 (rowstride_out);
kernel = calculate_gaussian_kernel (sigma, n_values);
/* vertical blur */
for (x_in = 0; x_in < width_in; x_in++)
for (y_out = 0; y_out < height_out; y_out++)
{
guchar *pixel_in, *pixel_out;
gint i0, i1;
y_in = y_out - half;
/* We read from the source at 'y = y_in + i - half'; clamp the
* full i range [0, n_values) so that y is in [0, height_in).
*/
i0 = MAX (half - y_in, 0);
i1 = MIN (height_in + half - y_in, n_values);
pixel_in = pixels_in + (y_in + i0 - half) * rowstride_in + x_in;
pixel_out = pixels_out + y_out * rowstride_out + (x_in + half);
for (i = i0; i < i1; i++)
{
*pixel_out += *pixel_in * kernel[i];
pixel_in += rowstride_in;
}
}
/* horizontal blur */
for (y_out = 0; y_out < height_out; y_out++)
{
memcpy (line, pixels_out + y_out * rowstride_out, rowstride_out);
for (x_out = 0; x_out < width_out; x_out++)
{
gint i0, i1;
guchar *pixel_out, *pixel_in;
/* We read from the source at 'x = x_out + i - half'; clamp the
* full i range [0, n_values) so that x is in [0, width_out).
*/
i0 = MAX (half - x_out, 0);
i1 = MIN (width_out + half - x_out, n_values);
pixel_in = line + x_out + i0 - half;
pixel_out = pixels_out + rowstride_out * y_out + x_out;
*pixel_out = 0;
for (i = i0; i < i1; i++)
{
*pixel_out += *pixel_in * kernel[i];
pixel_in++;
}
}
}
g_free (kernel);
g_free (line);
}
texture = cogl_texture_new_from_data (width_out,
height_out,
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_A_8,
COGL_PIXEL_FORMAT_A_8,
rowstride_out,
pixels_out);
g_free (pixels_in);
g_free (pixels_out);
material = cogl_material_new ();
cogl_material_set_layer (material, 0, texture);
/* We set up the material to blend the shadow texture with the combine
* constant, but defer setting the latter until painting, so that we can
* take the actor's overall opacity into account. */
cogl_material_set_layer_combine (material, 0,
"RGBA = MODULATE (CONSTANT, TEXTURE[A])",
NULL);
cogl_handle_unref (texture);
return material;
}
CoglHandle
_st_create_shadow_material_from_actor (StShadow *shadow_spec,
ClutterActor *actor)
{
CoglHandle shadow_material = COGL_INVALID_HANDLE;
if (CLUTTER_IS_TEXTURE (actor))
{
CoglHandle texture;
texture = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (actor));
shadow_material = _st_create_shadow_material (shadow_spec, texture);
}
else
{
CoglHandle buffer, offscreen;
ClutterActorBox box;
float width, height;
clutter_actor_get_allocation_box (actor, &box);
clutter_actor_box_get_size (&box, &width, &height);
buffer = cogl_texture_new_with_size (width,
height,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
offscreen = cogl_offscreen_new_to_texture (buffer);
if (offscreen != COGL_INVALID_HANDLE)
{
CoglColor clear_color;
cogl_color_set_from_4ub (&clear_color, 0, 0, 0, 0);
cogl_push_framebuffer (offscreen);
cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR);
cogl_ortho (0, width, height, 0, 0, 1.0);
clutter_actor_paint (actor);
cogl_pop_framebuffer ();
cogl_handle_unref (offscreen);
shadow_material = _st_create_shadow_material (shadow_spec, buffer);
}
cogl_handle_unref (buffer);
}
return shadow_material;
}
void
_st_paint_shadow_with_opacity (StShadow *shadow_spec,
CoglHandle shadow_material,
ClutterActorBox *box,
guint8 paint_opacity)
{
ClutterActorBox shadow_box;
CoglColor color;
g_return_if_fail (shadow_spec != NULL);
g_return_if_fail (shadow_material != COGL_INVALID_HANDLE);
st_shadow_get_box (shadow_spec, box, &shadow_box);
cogl_color_set_from_4ub (&color,
shadow_spec->color.red * paint_opacity / 255,
shadow_spec->color.green * paint_opacity / 255,
shadow_spec->color.blue * paint_opacity / 255,
shadow_spec->color.alpha * paint_opacity / 255);
cogl_color_premultiply (&color);
cogl_material_set_layer_combine_constant (shadow_material, 0, &color);
cogl_set_source (shadow_material);
cogl_rectangle_with_texture_coords (shadow_box.x1, shadow_box.y1,
shadow_box.x2, shadow_box.y2,
0, 0, 1, 1);
}
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