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gnome-shell/src/st/st-theme-node.c
Quentin Glidic 25948f214e St: Implement background-size CSS property 
Implement the background-size CSS property, specified by the CSS
Backgrounds and Borders Module Level 3, including the keywords
"contain", "cover", and fixed-size backgrounds.

https://bugzilla.gnome.org/show_bug.cgi?id=633462
2011-12-23 14:23:23 -05:00

3555 lines
104 KiB
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* st-theme-node.c: style information for one node in a tree of themed objects
*
* Copyright 2008-2010 Red Hat, Inc.
* Copyright 2009 Steve Frécinaux
* Copyright 2009, 2010 Florian Müllner
* Copyright 2010 Adel Gadllah
* Copyright 2010 Giovanni Campagna
* Copyright 2011 Quentin "Sardem FF7" Glidic
*
* This program 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 2.1 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include "st-theme-private.h"
#include "st-theme-context.h"
#include "st-theme-node-private.h"
static void st_theme_node_init (StThemeNode *node);
static void st_theme_node_class_init (StThemeNodeClass *klass);
static void st_theme_node_dispose (GObject *object);
static void st_theme_node_finalize (GObject *object);
static const ClutterColor BLACK_COLOR = { 0, 0, 0, 0xff };
static const ClutterColor TRANSPARENT_COLOR = { 0, 0, 0, 0 };
static const ClutterColor DEFAULT_SUCCESS_COLOR = { 0x4e, 0x9a, 0x06, 0xff };
static const ClutterColor DEFAULT_WARNING_COLOR = { 0xf5, 0x79, 0x3e, 0xff };
static const ClutterColor DEFAULT_ERROR_COLOR = { 0xcc, 0x00, 0x00, 0xff };
extern gfloat st_slow_down_factor;
G_DEFINE_TYPE (StThemeNode, st_theme_node, G_TYPE_OBJECT)
static void
st_theme_node_init (StThemeNode *node)
{
node->transition_duration = -1;
_st_theme_node_init_drawing_state (node);
}
static void
st_theme_node_class_init (StThemeNodeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = st_theme_node_dispose;
object_class->finalize = st_theme_node_finalize;
}
static void
st_theme_node_dispose (GObject *gobject)
{
StThemeNode *node = ST_THEME_NODE (gobject);
if (node->context)
{
g_object_unref (node->context);
node->context = NULL;
}
if (node->theme)
{
g_object_unref (node->theme);
node->theme = NULL;
}
if (node->parent_node)
{
g_object_unref (node->parent_node);
node->parent_node = NULL;
}
if (node->border_image)
{
g_object_unref (node->border_image);
node->border_image = NULL;
}
if (node->icon_colors)
{
st_icon_colors_unref (node->icon_colors);
node->icon_colors = NULL;
}
G_OBJECT_CLASS (st_theme_node_parent_class)->dispose (gobject);
}
static void
st_theme_node_finalize (GObject *object)
{
StThemeNode *node = ST_THEME_NODE (object);
g_free (node->element_id);
g_free (node->element_class);
g_free (node->pseudo_class);
g_free (node->inline_style);
if (node->properties)
{
g_free (node->properties);
node->properties = NULL;
node->n_properties = 0;
}
if (node->inline_properties)
{
/* This destroys the list, not just the head of the list */
cr_declaration_destroy (node->inline_properties);
}
if (node->font_desc)
{
pango_font_description_free (node->font_desc);
node->font_desc = NULL;
}
if (node->box_shadow)
{
st_shadow_unref (node->box_shadow);
node->box_shadow = NULL;
}
if (node->background_image_shadow)
{
st_shadow_unref (node->background_image_shadow);
node->background_image_shadow = NULL;
}
if (node->text_shadow)
{
st_shadow_unref (node->text_shadow);
node->text_shadow = NULL;
}
if (node->background_image)
g_free (node->background_image);
_st_theme_node_free_drawing_state (node);
G_OBJECT_CLASS (st_theme_node_parent_class)->finalize (object);
}
/**
* st_theme_node_new:
* @context: the context representing global state for this themed tree
* @parent_node: (allow-none): the parent node of this node
* @theme: (allow-none): a theme (stylesheet set) that overrides the
* theme inherited from the parent node
* @element_type: the type of the GObject represented by this node
* in the tree (corresponding to an element if we were theming an XML
* document. %G_TYPE_NONE means this style was created for the stage
* actor and matches a selector element name of 'stage'.
* @element_id: (allow-none): the ID to match CSS rules against
* @element_class: (allow-none): a whitespace-separated list of classes
* to match CSS rules against
* @pseudo_class: (allow-none): a whitespace-separated list of pseudo-classes
* (like 'hover' or 'visited') to match CSS rules against
*
* Creates a new #StThemeNode. Once created, a node is immutable. Of any
* of the attributes of the node (like the @element_class) change the node
* and its child nodes must be destroyed and recreated.
*
* Return value: (transfer full): the theme node
*/
StThemeNode *
st_theme_node_new (StThemeContext *context,
StThemeNode *parent_node,
StTheme *theme,
GType element_type,
const char *element_id,
const char *element_class,
const char *pseudo_class,
const char *inline_style)
{
StThemeNode *node;
g_return_val_if_fail (ST_IS_THEME_CONTEXT (context), NULL);
g_return_val_if_fail (parent_node == NULL || ST_IS_THEME_NODE (parent_node), NULL);
node = g_object_new (ST_TYPE_THEME_NODE, NULL);
node->context = g_object_ref (context);
if (parent_node != NULL)
node->parent_node = g_object_ref (parent_node);
else
node->parent_node = NULL;
if (theme == NULL && parent_node != NULL)
theme = parent_node->theme;
if (theme != NULL)
node->theme = g_object_ref (theme);
node->element_type = element_type;
node->element_id = g_strdup (element_id);
node->element_class = g_strdup (element_class);
node->pseudo_class = g_strdup (pseudo_class);
node->inline_style = g_strdup (inline_style);
return node;
}
/**
* st_theme_node_get_parent:
* @node: a #StThemeNode
*
* Gets the parent themed element node.
*
* Return value: (transfer none): the parent #StThemeNode, or %NULL if this
* is the root node of the tree of theme elements.
*/
StThemeNode *
st_theme_node_get_parent (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
return node->parent_node;
}
/**
* st_theme_node_get_theme:
* @node: a #StThemeNode
*
* Gets the theme stylesheet set that styles this node
*
* Return value: (transfer none): the theme stylesheet set
*/
StTheme *
st_theme_node_get_theme (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
return node->theme;
}
GType
st_theme_node_get_element_type (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), G_TYPE_NONE);
return node->element_type;
}
const char *
st_theme_node_get_element_id (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
return node->element_id;
}
const char *
st_theme_node_get_element_class (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
return node->element_class;
}
const char *
st_theme_node_get_pseudo_class (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
return node->pseudo_class;
}
/**
* st_theme_node_equal:
* @node_a: first #StThemeNode
* @node_b: second #StThemeNode
*
* Compare two #StThemeNodes. Two nodes which compare equal will match
* the same CSS rules and have the same style properties. However, two
* nodes that have ended up with identical style properties do not
* necessarily compare equal.
* In detail, @node_a and @node_b are considered equal iff
* <itemizedlist>
* <listitem>
* <para>they share the same #StTheme and #StThemeContext</para>
* </listitem>
* <listitem>
* <para>they have the same parent</para>
* </listitem>
* <listitem>
* <para>they have the same element type</para>
* </listitem>
* <listitem>
* <para>their id, class, pseudo-class and inline-style match</para>
* </listitem>
* </itemizedlist>
*
* Returns: %TRUE if @node_a equals @node_b
*/
gboolean
st_theme_node_equal (StThemeNode *node_a, StThemeNode *node_b)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node_a), FALSE);
g_return_val_if_fail (ST_IS_THEME_NODE (node_b), FALSE);
return node_a->parent_node == node_b->parent_node &&
node_a->context == node_b->context &&
node_a->theme == node_b->theme &&
node_a->element_type == node_b->element_type &&
!g_strcmp0 (node_a->element_id, node_b->element_id) &&
!g_strcmp0 (node_a->element_class, node_b->element_class) &&
!g_strcmp0 (node_a->pseudo_class, node_b->pseudo_class) &&
!g_strcmp0 (node_a->inline_style, node_b->inline_style);
}
static void
ensure_properties (StThemeNode *node)
{
if (!node->properties_computed)
{
GPtrArray *properties = NULL;
node->properties_computed = TRUE;
if (node->theme)
properties = _st_theme_get_matched_properties (node->theme, node);
if (node->inline_style)
{
CRDeclaration *cur_decl;
if (!properties)
properties = g_ptr_array_new ();
node->inline_properties = _st_theme_parse_declaration_list (node->inline_style);
for (cur_decl = node->inline_properties; cur_decl; cur_decl = cur_decl->next)
g_ptr_array_add (properties, cur_decl);
}
if (properties)
{
node->n_properties = properties->len;
node->properties = (CRDeclaration **)g_ptr_array_free (properties, FALSE);
}
}
}
typedef enum {
VALUE_FOUND,
VALUE_NOT_FOUND,
VALUE_INHERIT
} GetFromTermResult;
static gboolean
term_is_inherit (CRTerm *term)
{
return (term->type == TERM_IDENT &&
strcmp (term->content.str->stryng->str, "inherit") == 0);
}
static gboolean
term_is_none (CRTerm *term)
{
return (term->type == TERM_IDENT &&
strcmp (term->content.str->stryng->str, "none") == 0);
}
static gboolean
term_is_transparent (CRTerm *term)
{
return (term->type == TERM_IDENT &&
strcmp (term->content.str->stryng->str, "transparent") == 0);
}
static int
color_component_from_double (double component)
{
/* We want to spread the range 0-1 equally over 0..255, but
* 1.0 should map to 255 not 256, so we need to special-case it.
* See http://people.redhat.com/otaylor/pixel-converting.html
* for (very) detailed discussion of related issues. */
if (component >= 1.0)
return 255;
else
return (int)(component * 256);
}
static GetFromTermResult
get_color_from_rgba_term (CRTerm *term,
ClutterColor *color)
{
CRTerm *arg = term->ext_content.func_param;
CRNum *num;
double r = 0, g = 0, b = 0, a = 0;
int i;
for (i = 0; i < 4; i++)
{
double value;
if (arg == NULL)
return VALUE_NOT_FOUND;
if ((i == 0 && arg->the_operator != NO_OP) ||
(i > 0 && arg->the_operator != COMMA))
return VALUE_NOT_FOUND;
if (arg->type != TERM_NUMBER)
return VALUE_NOT_FOUND;
num = arg->content.num;
/* For simplicity, we convert a,r,g,b to [0,1.0] floats and then
* convert them back below. Then when we set them on a cairo content
* we convert them back to floats, and then cairo converts them
* back to integers to pass them to X, and so forth...
*/
if (i < 3)
{
if (num->type == NUM_PERCENTAGE)
value = num->val / 100;
else if (num->type == NUM_GENERIC)
value = num->val / 255;
else
return VALUE_NOT_FOUND;
}
else
{
if (num->type != NUM_GENERIC)
return VALUE_NOT_FOUND;
value = num->val;
}
value = CLAMP (value, 0, 1);
switch (i)
{
case 0:
r = value;
break;
case 1:
g = value;
break;
case 2:
b = value;
break;
case 3:
a = value;
break;
}
arg = arg->next;
}
color->red = color_component_from_double (r);
color->green = color_component_from_double (g);
color->blue = color_component_from_double (b);
color->alpha = color_component_from_double (a);
return VALUE_FOUND;
}
static GetFromTermResult
get_color_from_term (StThemeNode *node,
CRTerm *term,
ClutterColor *color)
{
CRRgb rgb;
enum CRStatus status;
/* Since libcroco doesn't know about rgba colors, it can't handle
* the transparent keyword
*/
if (term_is_transparent (term))
{
*color = TRANSPARENT_COLOR;
return VALUE_FOUND;
}
/* rgba () colors - a CSS3 addition, are not supported by libcroco,
* but they are parsed as a "function", so we can emulate the
* functionality.
*/
else if (term->type == TERM_FUNCTION &&
term->content.str &&
term->content.str->stryng &&
term->content.str->stryng->str &&
strcmp (term->content.str->stryng->str, "rgba") == 0)
{
return get_color_from_rgba_term (term, color);
}
status = cr_rgb_set_from_term (&rgb, term);
if (status != CR_OK)
return VALUE_NOT_FOUND;
if (rgb.inherit)
return VALUE_INHERIT;
if (rgb.is_percentage)
cr_rgb_compute_from_percentage (&rgb);
color->red = rgb.red;
color->green = rgb.green;
color->blue = rgb.blue;
color->alpha = 0xff;
return VALUE_FOUND;
}
/**
* st_theme_node_lookup_color:
* @node: a #StThemeNode
* @property_name: The name of the color property
* @inherit: if %TRUE, if a value is not found for the property on the
* node, then it will be looked up on the parent node, and then on the
* parent's parent, and so forth. Note that if the property has a
* value of 'inherit' it will be inherited even if %FALSE is passed
* in for @inherit; this only affects the default behavior for inheritance.
* @color: (out caller-allocates): location to store the color that was
* determined. If the property is not found, the value in this location
* will not be changed.
*
* Generically looks up a property containing a single color value. When
* specific getters (like st_theme_node_get_background_color()) exist, they
* should be used instead. They are cached, so more efficient, and have
* handling for shortcut properties and other details of CSS.
*
* See also st_theme_node_get_color(), which provides a simpler API.
*
* Return value: %TRUE if the property was found in the properties for this
* theme node (or in the properties of parent nodes when inheriting.)
*/
gboolean
st_theme_node_lookup_color (StThemeNode *node,
const char *property_name,
gboolean inherit,
ClutterColor *color)
{
int i;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, property_name) == 0)
{
GetFromTermResult result = get_color_from_term (node, decl->value, color);
if (result == VALUE_FOUND)
{
return TRUE;
}
else if (result == VALUE_INHERIT)
{
if (node->parent_node)
return st_theme_node_lookup_color (node->parent_node, property_name, inherit, color);
else
break;
}
}
}
if (inherit && node->parent_node)
return st_theme_node_lookup_color (node->parent_node, property_name, inherit, color);
return FALSE;
}
/**
* st_theme_node_get_color:
* @node: a #StThemeNode
* @property_name: The name of the color property
* @color: (out caller-allocates): location to store the color that
* was determined.
*
* Generically looks up a property containing a single color value. When
* specific getters (like st_theme_node_get_background_color()) exist, they
* should be used instead. They are cached, so more efficient, and have
* handling for shortcut properties and other details of CSS.
*
* If @property_name is not found, a warning will be logged and a
* default color returned.
*
* See also st_theme_node_lookup_color(), which provides more options,
* and lets you handle the case where the theme does not specify the
* indicated color.
*/
void
st_theme_node_get_color (StThemeNode *node,
const char *property_name,
ClutterColor *color)
{
if (!st_theme_node_lookup_color (node, property_name, FALSE, color))
{
g_warning ("Did not find color property '%s'", property_name);
memset (color, 0, sizeof (ClutterColor));
}
}
/**
* st_theme_node_lookup_double:
* @node: a #StThemeNode
* @property_name: The name of the numeric property
* @inherit: if %TRUE, if a value is not found for the property on the
* node, then it will be looked up on the parent node, and then on the
* parent's parent, and so forth. Note that if the property has a
* value of 'inherit' it will be inherited even if %FALSE is passed
* in for @inherit; this only affects the default behavior for inheritance.
* @value: (out): location to store the value that was determined.
* If the property is not found, the value in this location
* will not be changed.
*
* Generically looks up a property containing a single numeric value
* without units.
*
* See also st_theme_node_get_double(), which provides a simpler API.
*
* Return value: %TRUE if the property was found in the properties for this
* theme node (or in the properties of parent nodes when inheriting.)
*/
gboolean
st_theme_node_lookup_double (StThemeNode *node,
const char *property_name,
gboolean inherit,
double *value)
{
gboolean result = FALSE;
int i;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, property_name) == 0)
{
CRTerm *term = decl->value;
if (term->type != TERM_NUMBER || term->content.num->type != NUM_GENERIC)
continue;
*value = term->content.num->val;
result = TRUE;
break;
}
}
if (!result && inherit && node->parent_node)
result = st_theme_node_lookup_double (node->parent_node, property_name, inherit, value);
return result;
}
/**
* st_theme_node_get_double:
* @node: a #StThemeNode
* @property_name: The name of the numeric property
*
* Generically looks up a property containing a single numeric value
* without units.
*
* See also st_theme_node_lookup_double(), which provides more options,
* and lets you handle the case where the theme does not specify the
* indicated value.
*
* Return value: the value found. If @property_name is not
* found, a warning will be logged and 0 will be returned.
*/
gdouble
st_theme_node_get_double (StThemeNode *node,
const char *property_name)
{
gdouble value;
if (st_theme_node_lookup_double (node, property_name, FALSE, &value))
return value;
else
{
g_warning ("Did not find double property '%s'", property_name);
return 0.0;
}
}
static const PangoFontDescription *
get_parent_font (StThemeNode *node)
{
if (node->parent_node)
return st_theme_node_get_font (node->parent_node);
else
return st_theme_context_get_font (node->context);
}
static GetFromTermResult
get_length_from_term (StThemeNode *node,
CRTerm *term,
gboolean use_parent_font,
gdouble *length)
{
CRNum *num;
enum {
ABSOLUTE,
POINTS,
FONT_RELATIVE,
} type = ABSOLUTE;
double multiplier = 1.0;
if (term->type != TERM_NUMBER)
{
g_warning ("Ignoring length property that isn't a number");
return VALUE_NOT_FOUND;
}
num = term->content.num;
switch (num->type)
{
case NUM_LENGTH_PX:
type = ABSOLUTE;
multiplier = 1;
break;
case NUM_LENGTH_PT:
type = POINTS;
multiplier = 1;
break;
case NUM_LENGTH_IN:
type = POINTS;
multiplier = 72;
break;
case NUM_LENGTH_CM:
type = POINTS;
multiplier = 72. / 2.54;
break;
case NUM_LENGTH_MM:
type = POINTS;
multiplier = 72. / 25.4;
break;
case NUM_LENGTH_PC:
type = POINTS;
multiplier = 12. / 25.4;
break;
case NUM_LENGTH_EM:
{
type = FONT_RELATIVE;
multiplier = 1;
break;
}
case NUM_LENGTH_EX:
{
/* Doing better would require actually resolving the font description
* to a specific font, and Pango doesn't have an ex metric anyways,
* so we'd have to try and synthesize it by complicated means.
*
* The 0.5em is the CSS spec suggested thing to use when nothing
* better is available.
*/
type = FONT_RELATIVE;
multiplier = 0.5;
break;
}
case NUM_INHERIT:
return VALUE_INHERIT;
case NUM_AUTO:
g_warning ("'auto' not supported for lengths");
return VALUE_NOT_FOUND;
case NUM_GENERIC:
{
if (num->val != 0)
{
g_warning ("length values must specify a unit");
return VALUE_NOT_FOUND;
}
else
{
type = ABSOLUTE;
multiplier = 0;
}
break;
}
case NUM_PERCENTAGE:
g_warning ("percentage lengths not currently supported");
return VALUE_NOT_FOUND;
case NUM_ANGLE_DEG:
case NUM_ANGLE_RAD:
case NUM_ANGLE_GRAD:
case NUM_TIME_MS:
case NUM_TIME_S:
case NUM_FREQ_HZ:
case NUM_FREQ_KHZ:
case NUM_UNKNOWN_TYPE:
case NB_NUM_TYPE:
g_warning ("Ignoring invalid type of number of length property");
return VALUE_NOT_FOUND;
}
switch (type)
{
case ABSOLUTE:
*length = num->val * multiplier;
break;
case POINTS:
{
double resolution = st_theme_context_get_resolution (node->context);
*length = num->val * multiplier * (resolution / 72.);
}
break;
case FONT_RELATIVE:
{
const PangoFontDescription *desc;
double font_size;
if (use_parent_font)
desc = get_parent_font (node);
else
desc = st_theme_node_get_font (node);
font_size = (double)pango_font_description_get_size (desc) / PANGO_SCALE;
if (pango_font_description_get_size_is_absolute (desc))
{
*length = num->val * multiplier * font_size;
}
else
{
double resolution = st_theme_context_get_resolution (node->context);
*length = num->val * multiplier * (resolution / 72.) * font_size;
}
}
break;
default:
g_assert_not_reached ();
}
return VALUE_FOUND;
}
static GetFromTermResult
get_length_from_term_int (StThemeNode *node,
CRTerm *term,
gboolean use_parent_font,
gint *length)
{
double value;
GetFromTermResult result;
result = get_length_from_term (node, term, use_parent_font, &value);
if (result == VALUE_FOUND)
*length = (int) (0.5 + value);
return result;
}
static GetFromTermResult
get_length_internal (StThemeNode *node,
const char *property_name,
const char *suffixed,
gdouble *length)
{
int i;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, property_name) == 0 ||
(suffixed != NULL && strcmp (decl->property->stryng->str, suffixed) == 0))
{
GetFromTermResult result = get_length_from_term (node, decl->value, FALSE, length);
if (result != VALUE_NOT_FOUND)
return result;
}
}
return VALUE_NOT_FOUND;
}
/**
* st_theme_node_lookup_length:
* @node: a #StThemeNode
* @property_name: The name of the length property
* @inherit: if %TRUE, if a value is not found for the property on the
* node, then it will be looked up on the parent node, and then on the
* parent's parent, and so forth. Note that if the property has a
* value of 'inherit' it will be inherited even if %FALSE is passed
* in for @inherit; this only affects the default behavior for inheritance.
* @length: (out): location to store the length that was determined.
* If the property is not found, the value in this location
* will not be changed. The returned length is resolved
* to pixels.
*
* Generically looks up a property containing a single length value. When
* specific getters (like st_theme_node_get_border_width()) exist, they
* should be used instead. They are cached, so more efficient, and have
* handling for shortcut properties and other details of CSS.
*
* See also st_theme_node_get_length(), which provides a simpler API.
*
* Return value: %TRUE if the property was found in the properties for this
* theme node (or in the properties of parent nodes when inheriting.)
*/
gboolean
st_theme_node_lookup_length (StThemeNode *node,
const char *property_name,
gboolean inherit,
gdouble *length)
{
GetFromTermResult result = get_length_internal (node, property_name, NULL, length);
if (result == VALUE_FOUND)
return TRUE;
else if (result == VALUE_INHERIT)
inherit = TRUE;
if (inherit && node->parent_node &&
st_theme_node_lookup_length (node->parent_node, property_name, inherit, length))
return TRUE;
else
return FALSE;
}
/**
* st_theme_node_get_length:
* @node: a #StThemeNode
* @property_name: The name of the length property
*
* Generically looks up a property containing a single length value. When
* specific getters (like st_theme_node_get_border_width()) exist, they
* should be used instead. They are cached, so more efficient, and have
* handling for shortcut properties and other details of CSS.
*
* Unlike st_theme_node_get_color() and st_theme_node_get_double(),
* this does not print a warning if the property is not found; it just
* returns 0.
*
* See also st_theme_node_lookup_length(), which provides more options.
*
* Return value: the length, in pixels, or 0 if the property was not found.
*/
gdouble
st_theme_node_get_length (StThemeNode *node,
const char *property_name)
{
gdouble length;
if (st_theme_node_lookup_length (node, property_name, FALSE, &length))
return length;
else
return 0.0;
}
static void
do_border_radius_term (StThemeNode *node,
CRTerm *term,
gboolean topleft,
gboolean topright,
gboolean bottomright,
gboolean bottomleft)
{
int value;
if (get_length_from_term_int (node, term, FALSE, &value) != VALUE_FOUND)
return;
if (topleft)
node->border_radius[ST_CORNER_TOPLEFT] = value;
if (topright)
node->border_radius[ST_CORNER_TOPRIGHT] = value;
if (bottomright)
node->border_radius[ST_CORNER_BOTTOMRIGHT] = value;
if (bottomleft)
node->border_radius[ST_CORNER_BOTTOMLEFT] = value;
}
static void
do_border_radius (StThemeNode *node,
CRDeclaration *decl)
{
const char *property_name = decl->property->stryng->str + 13; /* Skip 'border-radius' */
if (strcmp (property_name, "") == 0)
{
/* Slight deviation ... if we don't understand some of the terms and understand others,
* then we set the ones we understand and ignore the others instead of ignoring the
* whole thing
*/
if (decl->value == NULL) /* 0 values */
return;
else if (decl->value->next == NULL) /* 1 value */
{
do_border_radius_term (node, decl->value, TRUE, TRUE, TRUE, TRUE); /* all corners */
return;
}
else if (decl->value->next->next == NULL) /* 2 values */
{
do_border_radius_term (node, decl->value, TRUE, FALSE, TRUE, FALSE); /* topleft/bottomright */
do_border_radius_term (node, decl->value->next, FALSE, TRUE, FALSE, TRUE); /* topright/bottomleft */
}
else if (decl->value->next->next->next == NULL) /* 3 values */
{
do_border_radius_term (node, decl->value, TRUE, FALSE, FALSE, FALSE); /* topleft */
do_border_radius_term (node, decl->value->next, FALSE, TRUE, FALSE, TRUE); /* topright/bottomleft */
do_border_radius_term (node, decl->value->next->next, FALSE, FALSE, TRUE, FALSE); /* bottomright */
}
else if (decl->value->next->next->next->next == NULL) /* 4 values */
{
do_border_radius_term (node, decl->value, TRUE, FALSE, FALSE, FALSE); /* topleft */
do_border_radius_term (node, decl->value->next, FALSE, TRUE, FALSE, FALSE); /* topright */
do_border_radius_term (node, decl->value->next->next, FALSE, FALSE, TRUE, FALSE); /* bottomright */
do_border_radius_term (node, decl->value->next->next->next, FALSE, FALSE, FALSE, TRUE); /* bottomleft */
}
else
{
g_warning ("Too many values for border-radius property");
return;
}
}
else
{
if (decl->value == NULL || decl->value->next != NULL)
return;
if (strcmp (property_name, "-topleft") == 0)
do_border_radius_term (node, decl->value, TRUE, FALSE, FALSE, FALSE);
else if (strcmp (property_name, "-topright") == 0)
do_border_radius_term (node, decl->value, FALSE, TRUE, FALSE, FALSE);
else if (strcmp (property_name, "-bottomright") == 0)
do_border_radius_term (node, decl->value, FALSE, FALSE, TRUE, FALSE);
else if (strcmp (property_name, "-bottomleft") == 0)
do_border_radius_term (node, decl->value, FALSE, FALSE, FALSE, TRUE);
}
}
static void
do_border_property (StThemeNode *node,
CRDeclaration *decl)
{
const char *property_name = decl->property->stryng->str + 6; /* Skip 'border' */
StSide side = (StSide)-1;
ClutterColor color;
gboolean color_set = FALSE;
int width = 0; /* suppress warning */
gboolean width_set = FALSE;
int j;
if (g_str_has_prefix (property_name, "-radius"))
{
do_border_radius (node, decl);
return;
}
if (g_str_has_prefix (property_name, "-left"))
{
side = ST_SIDE_LEFT;
property_name += 5;
}
else if (g_str_has_prefix (property_name, "-right"))
{
side = ST_SIDE_RIGHT;
property_name += 6;
}
else if (g_str_has_prefix (property_name, "-top"))
{
side = ST_SIDE_TOP;
property_name += 4;
}
else if (g_str_has_prefix (property_name, "-bottom"))
{
side = ST_SIDE_BOTTOM;
property_name += 7;
}
if (strcmp (property_name, "") == 0)
{
/* Set value for width/color/style in any order */
CRTerm *term;
for (term = decl->value; term; term = term->next)
{
GetFromTermResult result;
if (term->type == TERM_IDENT)
{
const char *ident = term->content.str->stryng->str;
if (strcmp (ident, "none") == 0 || strcmp (ident, "hidden") == 0)
{
width = 0;
width_set = TRUE;
continue;
}
else if (strcmp (ident, "solid") == 0)
{
/* The only thing we support */
continue;
}
else if (strcmp (ident, "dotted") == 0 ||
strcmp (ident, "dashed") == 0 ||
strcmp (ident, "double") == 0 ||
strcmp (ident, "groove") == 0 ||
strcmp (ident, "ridge") == 0 ||
strcmp (ident, "inset") == 0 ||
strcmp (ident, "outset") == 0)
{
/* Treat the same as solid */
continue;
}
/* Presumably a color, fall through */
}
if (term->type == TERM_NUMBER)
{
result = get_length_from_term_int (node, term, FALSE, &width);
if (result != VALUE_NOT_FOUND)
{
width_set = result == VALUE_FOUND;
continue;
}
}
result = get_color_from_term (node, term, &color);
if (result != VALUE_NOT_FOUND)
{
color_set = result == VALUE_FOUND;
continue;
}
}
}
else if (strcmp (property_name, "-color") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
return;
if (get_color_from_term (node, decl->value, &color) == VALUE_FOUND)
/* Ignore inherit */
color_set = TRUE;
}
else if (strcmp (property_name, "-width") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
return;
if (get_length_from_term_int (node, decl->value, FALSE, &width) == VALUE_FOUND)
/* Ignore inherit */
width_set = TRUE;
}
if (side == (StSide)-1)
{
for (j = 0; j < 4; j++)
{
if (color_set)
node->border_color[j] = color;
if (width_set)
node->border_width[j] = width;
}
}
else
{
if (color_set)
node->border_color[side] = color;
if (width_set)
node->border_width[side] = width;
}
}
static void
do_outline_property (StThemeNode *node,
CRDeclaration *decl)
{
const char *property_name = decl->property->stryng->str + 7; /* Skip 'outline' */
ClutterColor color;
gboolean color_set = FALSE;
int width = 0; /* suppress warning */
gboolean width_set = FALSE;
if (strcmp (property_name, "") == 0)
{
/* Set value for width/color/style in any order */
CRTerm *term;
for (term = decl->value; term; term = term->next)
{
GetFromTermResult result;
if (term->type == TERM_IDENT)
{
const char *ident = term->content.str->stryng->str;
if (strcmp (ident, "none") == 0 || strcmp (ident, "hidden") == 0)
{
width = 0;
width_set = TRUE;
continue;
}
else if (strcmp (ident, "solid") == 0)
{
/* The only thing we support */
continue;
}
else if (strcmp (ident, "dotted") == 0 ||
strcmp (ident, "dashed") == 0 ||
strcmp (ident, "double") == 0 ||
strcmp (ident, "groove") == 0 ||
strcmp (ident, "ridge") == 0 ||
strcmp (ident, "inset") == 0 ||
strcmp (ident, "outset") == 0)
{
/* Treat the same as solid */
continue;
}
/* Presumably a color, fall through */
}
if (term->type == TERM_NUMBER)
{
result = get_length_from_term_int (node, term, FALSE, &width);
if (result != VALUE_NOT_FOUND)
{
width_set = result == VALUE_FOUND;
continue;
}
}
result = get_color_from_term (node, term, &color);
if (result != VALUE_NOT_FOUND)
{
color_set = result == VALUE_FOUND;
continue;
}
}
}
else if (strcmp (property_name, "-color") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
return;
if (get_color_from_term (node, decl->value, &color) == VALUE_FOUND)
/* Ignore inherit */
color_set = TRUE;
}
else if (strcmp (property_name, "-width") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
return;
if (get_length_from_term_int (node, decl->value, FALSE, &width) == VALUE_FOUND)
/* Ignore inherit */
width_set = TRUE;
}
if (color_set)
node->outline_color = color;
if (width_set)
node->outline_width = width;
}
static void
do_padding_property_term (StThemeNode *node,
CRTerm *term,
gboolean left,
gboolean right,
gboolean top,
gboolean bottom)
{
int value;
if (get_length_from_term_int (node, term, FALSE, &value) != VALUE_FOUND)
return;
if (left)
node->padding[ST_SIDE_LEFT] = value;
if (right)
node->padding[ST_SIDE_RIGHT] = value;
if (top)
node->padding[ST_SIDE_TOP] = value;
if (bottom)
node->padding[ST_SIDE_BOTTOM] = value;
}
static void
do_padding_property (StThemeNode *node,
CRDeclaration *decl)
{
const char *property_name = decl->property->stryng->str + 7; /* Skip 'padding' */
if (strcmp (property_name, "") == 0)
{
/* Slight deviation ... if we don't understand some of the terms and understand others,
* then we set the ones we understand and ignore the others instead of ignoring the
* whole thing
*/
if (decl->value == NULL) /* 0 values */
return;
else if (decl->value->next == NULL) /* 1 value */
{
do_padding_property_term (node, decl->value, TRUE, TRUE, TRUE, TRUE); /* left/right/top/bottom */
return;
}
else if (decl->value->next->next == NULL) /* 2 values */
{
do_padding_property_term (node, decl->value, FALSE, FALSE, TRUE, TRUE); /* top/bottom */
do_padding_property_term (node, decl->value->next, TRUE, TRUE, FALSE, FALSE); /* left/right */
}
else if (decl->value->next->next->next == NULL) /* 3 values */
{
do_padding_property_term (node, decl->value, FALSE, FALSE, TRUE, FALSE); /* top */
do_padding_property_term (node, decl->value->next, TRUE, TRUE, FALSE, FALSE); /* left/right */
do_padding_property_term (node, decl->value->next->next, FALSE, FALSE, FALSE, TRUE); /* bottom */
}
else if (decl->value->next->next->next->next == NULL) /* 4 values */
{
do_padding_property_term (node, decl->value, FALSE, FALSE, TRUE, FALSE); /* top */
do_padding_property_term (node, decl->value->next, FALSE, TRUE, FALSE, FALSE); /* right */
do_padding_property_term (node, decl->value->next->next, FALSE, FALSE, FALSE, TRUE); /* bottom */
do_padding_property_term (node, decl->value->next->next->next, TRUE, FALSE, FALSE, FALSE); /* left */
}
else
{
g_warning ("Too many values for padding property");
return;
}
}
else
{
if (decl->value == NULL || decl->value->next != NULL)
return;
if (strcmp (property_name, "-left") == 0)
do_padding_property_term (node, decl->value, TRUE, FALSE, FALSE, FALSE);
else if (strcmp (property_name, "-right") == 0)
do_padding_property_term (node, decl->value, FALSE, TRUE, FALSE, FALSE);
else if (strcmp (property_name, "-top") == 0)
do_padding_property_term (node, decl->value, FALSE, FALSE, TRUE, FALSE);
else if (strcmp (property_name, "-bottom") == 0)
do_padding_property_term (node, decl->value, FALSE, FALSE, FALSE, TRUE);
}
}
static void
do_size_property (StThemeNode *node,
CRDeclaration *decl,
int *node_value)
{
get_length_from_term_int (node, decl->value, FALSE, node_value);
}
void
_st_theme_node_ensure_geometry (StThemeNode *node)
{
int i, j;
if (node->geometry_computed)
return;
node->geometry_computed = TRUE;
ensure_properties (node);
for (j = 0; j < 4; j++)
{
node->border_width[j] = 0;
node->border_color[j] = TRANSPARENT_COLOR;
}
node->outline_width = 0;
node->outline_color = TRANSPARENT_COLOR;
node->width = -1;
node->height = -1;
node->min_width = -1;
node->min_height = -1;
node->max_width = -1;
node->max_height = -1;
for (i = 0; i < node->n_properties; i++)
{
CRDeclaration *decl = node->properties[i];
const char *property_name = decl->property->stryng->str;
if (g_str_has_prefix (property_name, "border"))
do_border_property (node, decl);
else if (g_str_has_prefix (property_name, "outline"))
do_outline_property (node, decl);
else if (g_str_has_prefix (property_name, "padding"))
do_padding_property (node, decl);
else if (strcmp (property_name, "width") == 0)
do_size_property (node, decl, &node->width);
else if (strcmp (property_name, "height") == 0)
do_size_property (node, decl, &node->height);
else if (strcmp (property_name, "min-width") == 0)
do_size_property (node, decl, &node->min_width);
else if (strcmp (property_name, "min-height") == 0)
do_size_property (node, decl, &node->min_height);
else if (strcmp (property_name, "max-width") == 0)
do_size_property (node, decl, &node->max_width);
else if (strcmp (property_name, "max-height") == 0)
do_size_property (node, decl, &node->max_height);
}
if (node->width != -1)
{
if (node->min_width == -1)
node->min_width = node->width;
else if (node->width < node->min_width)
node->width = node->min_width;
if (node->max_width == -1)
node->max_width = node->width;
else if (node->width > node->max_width)
node->width = node->max_width;
}
if (node->height != -1)
{
if (node->min_height == -1)
node->min_height = node->height;
else if (node->height < node->min_height)
node->height = node->min_height;
if (node->max_height == -1)
node->max_height = node->height;
else if (node->height > node->max_height)
node->height = node->max_height;
}
}
int
st_theme_node_get_border_width (StThemeNode *node,
StSide side)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), 0.);
g_return_val_if_fail (side >= ST_SIDE_TOP && side <= ST_SIDE_LEFT, 0.);
_st_theme_node_ensure_geometry (node);
return node->border_width[side];
}
int
st_theme_node_get_border_radius (StThemeNode *node,
StCorner corner)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), 0.);
g_return_val_if_fail (corner >= ST_CORNER_TOPLEFT && corner <= ST_CORNER_BOTTOMLEFT, 0.);
_st_theme_node_ensure_geometry (node);
return node->border_radius[corner];
}
int
st_theme_node_get_outline_width (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), 0);
_st_theme_node_ensure_geometry (node);
return node->outline_width;
}
/**
* st_theme_node_get_outline_color:
* @node: a #StThemeNode
* @color: (out caller-allocates): location to store the color
*
* Gets the color of @node's outline.
*/
void
st_theme_node_get_outline_color (StThemeNode *node,
ClutterColor *color)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
_st_theme_node_ensure_geometry (node);
*color = node->outline_color;
}
int
st_theme_node_get_width (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), -1);
_st_theme_node_ensure_geometry (node);
return node->width;
}
int
st_theme_node_get_height (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), -1);
_st_theme_node_ensure_geometry (node);
return node->height;
}
int
st_theme_node_get_min_width (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), -1);
_st_theme_node_ensure_geometry (node);
return node->min_width;
}
int
st_theme_node_get_min_height (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), -1);
_st_theme_node_ensure_geometry (node);
return node->min_height;
}
int
st_theme_node_get_max_width (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), -1);
_st_theme_node_ensure_geometry (node);
return node->max_width;
}
int
st_theme_node_get_max_height (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), -1);
_st_theme_node_ensure_geometry (node);
return node->max_height;
}
static GetFromTermResult
get_background_color_from_term (StThemeNode *node,
CRTerm *term,
ClutterColor *color)
{
GetFromTermResult result = get_color_from_term (node, term, color);
if (result == VALUE_NOT_FOUND)
{
if (term_is_transparent (term))
{
*color = TRANSPARENT_COLOR;
return VALUE_FOUND;
}
}
return result;
}
void
_st_theme_node_ensure_background (StThemeNode *node)
{
int i;
if (node->background_computed)
return;
node->background_computed = TRUE;
node->background_color = TRANSPARENT_COLOR;
node->background_gradient_type = ST_GRADIENT_NONE;
node->background_position_set = FALSE;
node->background_size = ST_BACKGROUND_SIZE_AUTO;
ensure_properties (node);
for (i = 0; i < node->n_properties; i++)
{
CRDeclaration *decl = node->properties[i];
const char *property_name = decl->property->stryng->str;
if (g_str_has_prefix (property_name, "background"))
property_name += 10;
else
continue;
if (strcmp (property_name, "") == 0)
{
/* We're very liberal here ... if we recognize any term in the expression we take it, and
* we ignore the rest. The actual specification is:
*
* background: [<'background-color'> || <'background-image'> || <'background-repeat'> || <'background-attachment'> || <'background-position'>] | inherit
*/
CRTerm *term;
/* background: property sets all terms to specified or default values */
node->background_color = TRANSPARENT_COLOR;
g_free (node->background_image);
node->background_image = NULL;
node->background_position_set = FALSE;
node->background_size = ST_BACKGROUND_SIZE_AUTO;
for (term = decl->value; term; term = term->next)
{
GetFromTermResult result = get_background_color_from_term (node, term, &node->background_color);
if (result == VALUE_FOUND)
{
/* color stored in node->background_color */
}
else if (result == VALUE_INHERIT)
{
if (node->parent_node)
{
st_theme_node_get_background_color (node->parent_node, &node->background_color);
node->background_image = g_strdup (st_theme_node_get_background_image (node->parent_node));
}
}
else if (term_is_none (term))
{
/* leave node->background_color as transparent */
}
else if (term->type == TERM_URI)
{
CRStyleSheet *base_stylesheet;
if (decl->parent_statement != NULL)
base_stylesheet = decl->parent_statement->parent_sheet;
else
base_stylesheet = NULL;
node->background_image = _st_theme_resolve_url (node->theme,
base_stylesheet,
term->content.str->stryng->str);
}
}
}
else if (strcmp (property_name, "-position") == 0)
{
GetFromTermResult result = get_length_from_term_int (node, decl->value, FALSE, &node->background_position_x);
if (result == VALUE_NOT_FOUND)
{
node->background_position_set = FALSE;
continue;
}
else
node->background_position_set = TRUE;
result = get_length_from_term_int (node, decl->value->next, FALSE, &node->background_position_y);
if (result == VALUE_NOT_FOUND)
{
node->background_position_set = FALSE;
continue;
}
else
node->background_position_set = TRUE;
}
else if (strcmp (property_name, "-size") == 0)
{
if (decl->value->type == TERM_IDENT)
{
if (strcmp (decl->value->content.str->stryng->str, "contain") == 0)
node->background_size = ST_BACKGROUND_SIZE_CONTAIN;
else if (strcmp (decl->value->content.str->stryng->str, "cover") == 0)
node->background_size = ST_BACKGROUND_SIZE_COVER;
else if ((strcmp (decl->value->content.str->stryng->str, "auto") == 0) && (decl->value->next) && (decl->value->next->type == TERM_NUMBER))
{
GetFromTermResult result = get_length_from_term_int (node, decl->value->next, FALSE, &node->background_size_h);
node->background_size_w = -1;
node->background_size = (result == VALUE_FOUND) ? ST_BACKGROUND_SIZE_FIXED : ST_BACKGROUND_SIZE_AUTO;
}
else
node->background_size = ST_BACKGROUND_SIZE_AUTO;
}
else if (decl->value->type == TERM_NUMBER)
{
GetFromTermResult result = get_length_from_term_int (node, decl->value, FALSE, &node->background_size_w);
if (result == VALUE_NOT_FOUND)
continue;
node->background_size = ST_BACKGROUND_SIZE_FIXED;
if ((decl->value->next) && (decl->value->next->type == TERM_NUMBER))
{
result = get_length_from_term_int (node, decl->value->next, FALSE, &node->background_size_h);
if (result == VALUE_FOUND)
continue;
}
node->background_size_h = -1;
}
else
node->background_size = ST_BACKGROUND_SIZE_AUTO;
}
else if (strcmp (property_name, "-color") == 0)
{
GetFromTermResult result;
if (decl->value == NULL || decl->value->next != NULL)
continue;
result = get_background_color_from_term (node, decl->value, &node->background_color);
if (result == VALUE_FOUND)
{
/* color stored in node->background_color */
}
else if (result == VALUE_INHERIT)
{
if (node->parent_node)
st_theme_node_get_background_color (node->parent_node, &node->background_color);
}
}
else if (strcmp (property_name, "-image") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
continue;
if (decl->value->type == TERM_URI)
{
CRStyleSheet *base_stylesheet;
if (decl->parent_statement != NULL)
base_stylesheet = decl->parent_statement->parent_sheet;
else
base_stylesheet = NULL;
g_free (node->background_image);
node->background_image = _st_theme_resolve_url (node->theme,
base_stylesheet,
decl->value->content.str->stryng->str);
}
else if (term_is_inherit (decl->value))
{
g_free (node->background_image);
node->background_image = g_strdup (st_theme_node_get_background_image (node->parent_node));
}
else if (term_is_none (decl->value))
{
g_free (node->background_image);
node->background_image = NULL;
}
}
else if (strcmp (property_name, "-gradient-direction") == 0)
{
CRTerm *term = decl->value;
if (strcmp (term->content.str->stryng->str, "vertical") == 0)
{
node->background_gradient_type = ST_GRADIENT_VERTICAL;
}
else if (strcmp (term->content.str->stryng->str, "horizontal") == 0)
{
node->background_gradient_type = ST_GRADIENT_HORIZONTAL;
}
else if (strcmp (term->content.str->stryng->str, "radial") == 0)
{
node->background_gradient_type = ST_GRADIENT_RADIAL;
}
else if (strcmp (term->content.str->stryng->str, "none") == 0)
{
node->background_gradient_type = ST_GRADIENT_NONE;
}
else
{
g_warning ("Unrecognized background-gradient-direction \"%s\"",
term->content.str->stryng->str);
}
}
else if (strcmp (property_name, "-gradient-start") == 0)
{
get_color_from_term (node, decl->value, &node->background_color);
}
else if (strcmp (property_name, "-gradient-end") == 0)
{
get_color_from_term (node, decl->value, &node->background_gradient_end);
}
}
}
/**
* st_theme_node_get_background_color:
* @node: a #StThemeNode
* @color: (out caller-allocates): location to store the color
*
* Gets @node's background color.
*/
void
st_theme_node_get_background_color (StThemeNode *node,
ClutterColor *color)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
_st_theme_node_ensure_background (node);
*color = node->background_color;
}
const char *
st_theme_node_get_background_image (StThemeNode *node)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
_st_theme_node_ensure_background (node);
return node->background_image;
}
/**
* st_theme_node_get_foreground_color:
* @node: a #StThemeNode
* @color: (out caller-allocates): location to store the color
*
* Gets @node's foreground color.
*/
void
st_theme_node_get_foreground_color (StThemeNode *node,
ClutterColor *color)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
if (!node->foreground_computed)
{
int i;
node->foreground_computed = TRUE;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, "color") == 0)
{
GetFromTermResult result = get_color_from_term (node, decl->value, &node->foreground_color);
if (result == VALUE_FOUND)
goto out;
else if (result == VALUE_INHERIT)
break;
}
}
if (node->parent_node)
st_theme_node_get_foreground_color (node->parent_node, &node->foreground_color);
else
node->foreground_color = BLACK_COLOR; /* default to black */
}
out:
*color = node->foreground_color;
}
/**
* st_theme_node_get_background_gradient:
* @node: A #StThemeNode
* @type: (out): Type of gradient
* @start: (out caller-allocates): Color at start of gradient
* @end: (out caller-allocates): Color at end of gradient
*
* The @start and @end arguments will only be set if @type is not #ST_GRADIENT_NONE.
*/
void
st_theme_node_get_background_gradient (StThemeNode *node,
StGradientType *type,
ClutterColor *start,
ClutterColor *end)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
_st_theme_node_ensure_background (node);
*type = node->background_gradient_type;
if (*type != ST_GRADIENT_NONE)
{
*start = node->background_color;
*end = node->background_gradient_end;
}
}
/**
* st_theme_node_get_border_color:
* @node: a #StThemeNode
* @side: a #StSide
* @color: (out caller-allocates): location to store the color
*
* Gets the color of @node's border on @side
*/
void
st_theme_node_get_border_color (StThemeNode *node,
StSide side,
ClutterColor *color)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
g_return_if_fail (side >= ST_SIDE_TOP && side <= ST_SIDE_LEFT);
_st_theme_node_ensure_geometry (node);
*color = node->border_color[side];
}
double
st_theme_node_get_padding (StThemeNode *node,
StSide side)
{
g_return_val_if_fail (ST_IS_THEME_NODE (node), 0.);
g_return_val_if_fail (side >= ST_SIDE_TOP && side <= ST_SIDE_LEFT, 0.);
_st_theme_node_ensure_geometry (node);
return node->padding[side];
}
/**
* st_theme_node_get_transition_duration:
* @node: an #StThemeNode
*
* Get the value of the transition-duration property, which
* specifies the transition time between the previous #StThemeNode
* and @node.
*
* Returns: the node's transition duration in milliseconds
*/
int
st_theme_node_get_transition_duration (StThemeNode *node)
{
gdouble value = 0.0;
g_return_val_if_fail (ST_IS_THEME_NODE (node), 0);
if (node->transition_duration > -1)
return st_slow_down_factor * node->transition_duration;
st_theme_node_lookup_double (node, "transition-duration", FALSE, &value);
node->transition_duration = (int)value;
return st_slow_down_factor * node->transition_duration;
}
StTextDecoration
st_theme_node_get_text_decoration (StThemeNode *node)
{
int i;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, "text-decoration") == 0)
{
CRTerm *term = decl->value;
StTextDecoration decoration = 0;
/* Specification is none | [ underline || overline || line-through || blink ] | inherit
*
* We're a bit more liberal, and for example treat 'underline none' as the same as
* none.
*/
for (; term; term = term->next)
{
if (term->type != TERM_IDENT)
goto next_decl;
if (strcmp (term->content.str->stryng->str, "none") == 0)
{
return 0;
}
else if (strcmp (term->content.str->stryng->str, "inherit") == 0)
{
if (node->parent_node)
return st_theme_node_get_text_decoration (node->parent_node);
}
else if (strcmp (term->content.str->stryng->str, "underline") == 0)
{
decoration |= ST_TEXT_DECORATION_UNDERLINE;
}
else if (strcmp (term->content.str->stryng->str, "overline") == 0)
{
decoration |= ST_TEXT_DECORATION_OVERLINE;
}
else if (strcmp (term->content.str->stryng->str, "line-through") == 0)
{
decoration |= ST_TEXT_DECORATION_LINE_THROUGH;
}
else if (strcmp (term->content.str->stryng->str, "blink") == 0)
{
decoration |= ST_TEXT_DECORATION_BLINK;
}
else
{
goto next_decl;
}
}
return decoration;
}
next_decl:
;
}
return 0;
}
StTextAlign
st_theme_node_get_text_align(StThemeNode *node)
{
int i;
ensure_properties(node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp(decl->property->stryng->str, "text-align") == 0)
{
CRTerm *term = decl->value;
if (term->type != TERM_IDENT || term->next)
continue;
if (strcmp(term->content.str->stryng->str, "inherit") == 0)
{
if (node->parent_node)
return st_theme_node_get_text_align(node->parent_node);
return ST_TEXT_ALIGN_LEFT;
}
else if (strcmp(term->content.str->stryng->str, "left") == 0)
{
return ST_TEXT_ALIGN_LEFT;
}
else if (strcmp(term->content.str->stryng->str, "right") == 0)
{
return ST_TEXT_ALIGN_RIGHT;
}
else if (strcmp(term->content.str->stryng->str, "center") == 0)
{
return ST_TEXT_ALIGN_CENTER;
}
else if (strcmp(term->content.str->stryng->str, "justify") == 0)
{
return ST_TEXT_ALIGN_JUSTIFY;
}
}
}
if(node->parent_node)
return st_theme_node_get_text_align(node->parent_node);
return ST_TEXT_ALIGN_LEFT;
}
static gboolean
font_family_from_terms (CRTerm *term,
char **family)
{
GString *family_string;
gboolean result = FALSE;
gboolean last_was_quoted = FALSE;
if (!term)
return FALSE;
family_string = g_string_new (NULL);
while (term)
{
if (term->type != TERM_STRING && term->type != TERM_IDENT)
{
goto out;
}
if (family_string->len > 0)
{
if (term->the_operator != COMMA && term->the_operator != NO_OP)
goto out;
/* Can concatenate two bare words, but not two quoted strings */
if ((term->the_operator == NO_OP && last_was_quoted) || term->type == TERM_STRING)
goto out;
if (term->the_operator == NO_OP)
g_string_append (family_string, " ");
else
g_string_append (family_string, ", ");
}
else
{
if (term->the_operator != NO_OP)
goto out;
}
g_string_append (family_string, term->content.str->stryng->str);
term = term->next;
}
result = TRUE;
out:
if (result)
{
*family = g_string_free (family_string, FALSE);
return TRUE;
}
else
{
*family = g_string_free (family_string, TRUE);
return FALSE;
}
}
/* In points */
static int font_sizes[] = {
6 * 1024, /* xx-small */
8 * 1024, /* x-small */
10 * 1024, /* small */
12 * 1024, /* medium */
16 * 1024, /* large */
20 * 1024, /* x-large */
24 * 1024, /* xx-large */
};
static gboolean
font_size_from_term (StThemeNode *node,
CRTerm *term,
double *size)
{
if (term->type == TERM_IDENT)
{
double resolution = st_theme_context_get_resolution (node->context);
/* We work in integers to avoid double comparisons when converting back
* from a size in pixels to a logical size.
*/
int size_points = (int)(0.5 + *size * (72. / resolution));
if (strcmp (term->content.str->stryng->str, "xx-small") == 0)
size_points = font_sizes[0];
else if (strcmp (term->content.str->stryng->str, "x-small") == 0)
size_points = font_sizes[1];
else if (strcmp (term->content.str->stryng->str, "small") == 0)
size_points = font_sizes[2];
else if (strcmp (term->content.str->stryng->str, "medium") == 0)
size_points = font_sizes[3];
else if (strcmp (term->content.str->stryng->str, "large") == 0)
size_points = font_sizes[4];
else if (strcmp (term->content.str->stryng->str, "x-large") == 0)
size_points = font_sizes[5];
else if (strcmp (term->content.str->stryng->str, "xx-large") == 0)
size_points = font_sizes[6];
else if (strcmp (term->content.str->stryng->str, "smaller") == 0)
{
/* Find the standard size equal to or smaller than the current size */
int i = 0;
while (i <= 6 && font_sizes[i] < size_points)
i++;
if (i > 6)
{
/* original size greater than any standard size */
size_points = (int)(0.5 + size_points / 1.2);
}
else
{
/* Go one smaller than that, if possible */
if (i > 0)
i--;
size_points = font_sizes[i];
}
}
else if (strcmp (term->content.str->stryng->str, "larger") == 0)
{
/* Find the standard size equal to or larger than the current size */
int i = 6;
while (i >= 0 && font_sizes[i] > size_points)
i--;
if (i < 0) /* original size smaller than any standard size */
i = 0;
/* Go one larger than that, if possible */
if (i < 6)
i++;
size_points = font_sizes[i];
}
else
{
return FALSE;
}
*size = size_points * (resolution / 72.);
return TRUE;
}
else if (term->type == TERM_NUMBER && term->content.num->type == NUM_PERCENTAGE)
{
*size *= term->content.num->val / 100.;
return TRUE;
}
else if (get_length_from_term (node, term, TRUE, size) == VALUE_FOUND)
{
/* Convert from pixels to Pango units */
*size *= 1024;
return TRUE;
}
return FALSE;
}
static gboolean
font_weight_from_term (CRTerm *term,
PangoWeight *weight,
gboolean *weight_absolute)
{
if (term->type == TERM_NUMBER)
{
int weight_int;
/* The spec only allows numeric weights from 100-900, though Pango
* will handle any number. We just let anything through.
*/
if (term->content.num->type != NUM_GENERIC)
return FALSE;
weight_int = (int)(0.5 + term->content.num->val);
*weight = weight_int;
*weight_absolute = TRUE;
}
else if (term->type == TERM_IDENT)
{
/* FIXME: handle INHERIT */
if (strcmp (term->content.str->stryng->str, "bold") == 0)
{
*weight = PANGO_WEIGHT_BOLD;
*weight_absolute = TRUE;
}
else if (strcmp (term->content.str->stryng->str, "normal") == 0)
{
*weight = PANGO_WEIGHT_NORMAL;
*weight_absolute = TRUE;
}
else if (strcmp (term->content.str->stryng->str, "bolder") == 0)
{
*weight = PANGO_WEIGHT_BOLD;
*weight_absolute = FALSE;
}
else if (strcmp (term->content.str->stryng->str, "lighter") == 0)
{
*weight = PANGO_WEIGHT_LIGHT;
*weight_absolute = FALSE;
}
else
{
return FALSE;
}
}
else
{
return FALSE;
}
return TRUE;
}
static gboolean
font_style_from_term (CRTerm *term,
PangoStyle *style)
{
if (term->type != TERM_IDENT)
return FALSE;
/* FIXME: handle INHERIT */
if (strcmp (term->content.str->stryng->str, "normal") == 0)
*style = PANGO_STYLE_NORMAL;
else if (strcmp (term->content.str->stryng->str, "oblique") == 0)
*style = PANGO_STYLE_OBLIQUE;
else if (strcmp (term->content.str->stryng->str, "italic") == 0)
*style = PANGO_STYLE_ITALIC;
else
return FALSE;
return TRUE;
}
static gboolean
font_variant_from_term (CRTerm *term,
PangoVariant *variant)
{
if (term->type != TERM_IDENT)
return FALSE;
/* FIXME: handle INHERIT */
if (strcmp (term->content.str->stryng->str, "normal") == 0)
*variant = PANGO_VARIANT_NORMAL;
else if (strcmp (term->content.str->stryng->str, "small-caps") == 0)
*variant = PANGO_VARIANT_SMALL_CAPS;
else
return FALSE;
return TRUE;
}
const PangoFontDescription *
st_theme_node_get_font (StThemeNode *node)
{
/* Initialized despite _set flags to suppress compiler warnings */
PangoStyle font_style = PANGO_STYLE_NORMAL;
gboolean font_style_set = FALSE;
PangoVariant variant = PANGO_VARIANT_NORMAL;
gboolean variant_set = FALSE;
PangoWeight weight = PANGO_WEIGHT_NORMAL;
gboolean weight_absolute = TRUE;
gboolean weight_set = FALSE;
double size = 0.;
gboolean size_set = FALSE;
char *family = NULL;
double parent_size;
int i;
if (node->font_desc)
return node->font_desc;
node->font_desc = pango_font_description_copy (get_parent_font (node));
parent_size = pango_font_description_get_size (node->font_desc);
if (!pango_font_description_get_size_is_absolute (node->font_desc))
{
double resolution = st_theme_context_get_resolution (node->context);
parent_size *= (resolution / 72.);
}
ensure_properties (node);
for (i = 0; i < node->n_properties; i++)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, "font") == 0)
{
PangoStyle tmp_style = PANGO_STYLE_NORMAL;
PangoVariant tmp_variant = PANGO_VARIANT_NORMAL;
PangoWeight tmp_weight = PANGO_WEIGHT_NORMAL;
gboolean tmp_weight_absolute = TRUE;
double tmp_size;
CRTerm *term = decl->value;
/* A font specification starts with node/variant/weight
* in any order. Each is allowed to be specified only once,
* but we don't enforce that.
*/
for (; term; term = term->next)
{
if (font_style_from_term (term, &tmp_style))
continue;
if (font_variant_from_term (term, &tmp_variant))
continue;
if (font_weight_from_term (term, &tmp_weight, &tmp_weight_absolute))
continue;
break;
}
/* The size is mandatory */
if (term == NULL || term->type != TERM_NUMBER)
{
g_warning ("Size missing from font property");
continue;
}
tmp_size = parent_size;
if (!font_size_from_term (node, term, &tmp_size))
{
g_warning ("Couldn't parse size in font property");
continue;
}
term = term->next;
if (term != NULL && term->type && TERM_NUMBER && term->the_operator == DIVIDE)
{
/* Ignore line-height specification */
term = term->next;
}
/* the font family is mandatory - it is a comma-separated list of
* names.
*/
if (!font_family_from_terms (term, &family))
{
g_warning ("Couldn't parse family in font property");
continue;
}
font_style = tmp_style;
font_style_set = TRUE;
weight = tmp_weight;
weight_absolute = tmp_weight_absolute;
weight_set = TRUE;
variant = tmp_variant;
variant_set = TRUE;
size = tmp_size;
size_set = TRUE;
}
else if (strcmp (decl->property->stryng->str, "font-family") == 0)
{
if (!font_family_from_terms (decl->value, &family))
{
g_warning ("Couldn't parse family in font property");
continue;
}
}
else if (strcmp (decl->property->stryng->str, "font-weight") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
continue;
if (font_weight_from_term (decl->value, &weight, &weight_absolute))
weight_set = TRUE;
}
else if (strcmp (decl->property->stryng->str, "font-style") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
continue;
if (font_style_from_term (decl->value, &font_style))
font_style_set = TRUE;
}
else if (strcmp (decl->property->stryng->str, "font-variant") == 0)
{
if (decl->value == NULL || decl->value->next != NULL)
continue;
if (font_variant_from_term (decl->value, &variant))
variant_set = TRUE;
}
else if (strcmp (decl->property->stryng->str, "font-size") == 0)
{
gdouble tmp_size;
if (decl->value == NULL || decl->value->next != NULL)
continue;
tmp_size = parent_size;
if (font_size_from_term (node, decl->value, &tmp_size))
{
size = tmp_size;
size_set = TRUE;
}
}
}
if (family)
{
pango_font_description_set_family (node->font_desc, family);
g_free (family);
}
if (size_set)
pango_font_description_set_absolute_size (node->font_desc, size);
if (weight_set)
{
if (!weight_absolute)
{
/* bolder/lighter are supposed to switch between available styles, but with
* font substitution, that gets to be a pretty fuzzy concept. So we use
* a fixed step of 200. (The spec says 100, but that might not take us from
* normal to bold.
*/
PangoWeight old_weight = pango_font_description_get_weight (node->font_desc);
if (weight == PANGO_WEIGHT_BOLD)
weight = old_weight + 200;
else
weight = old_weight - 200;
if (weight < 100)
weight = 100;
if (weight > 900)
weight = 900;
}
pango_font_description_set_weight (node->font_desc, weight);
}
if (font_style_set)
pango_font_description_set_style (node->font_desc, font_style);
if (variant_set)
pango_font_description_set_variant (node->font_desc, variant);
return node->font_desc;
}
/**
* st_theme_node_get_border_image:
* @node: a #StThemeNode
*
* Gets the value for the border-image style property
*
* Return value: (transfer none): the border image, or %NULL
* if there is no border image.
*/
StBorderImage *
st_theme_node_get_border_image (StThemeNode *node)
{
int i;
if (node->border_image_computed)
return node->border_image;
node->border_image = NULL;
node->border_image_computed = TRUE;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, "border-image") == 0)
{
CRTerm *term = decl->value;
CRStyleSheet *base_stylesheet;
int borders[4];
int n_borders = 0;
int i;
const char *url;
int border_top;
int border_right;
int border_bottom;
int border_left;
char *filename;
/* Support border-image: none; to suppress a previously specified border image */
if (term_is_none (term))
{
if (term->next == NULL)
return NULL;
else
goto next_property;
}
/* First term must be the URL to the image */
if (term->type != TERM_URI)
goto next_property;
url = term->content.str->stryng->str;
term = term->next;
/* Followed by 0 to 4 numbers or percentages. *Not lengths*. The interpretation
* of a number is supposed to be pixels if the image is pixel based, otherwise CSS pixels.
*/
for (i = 0; i < 4; i++)
{
if (term == NULL)
break;
if (term->type != TERM_NUMBER)
goto next_property;
if (term->content.num->type == NUM_GENERIC)
{
borders[n_borders] = (int)(0.5 + term->content.num->val);
n_borders++;
}
else if (term->content.num->type == NUM_PERCENTAGE)
{
/* This would be easiest to support if we moved image handling into StBorderImage */
g_warning ("Percentages not supported for border-image");
goto next_property;
}
else
goto next_property;
term = term->next;
}
switch (n_borders)
{
case 0:
border_top = border_right = border_bottom = border_left = 0;
break;
case 1:
border_top = border_right = border_bottom = border_left = borders[0];
break;
case 2:
border_top = border_bottom = borders[0];
border_left = border_right = borders[1];
break;
case 3:
border_top = borders[0];
border_left = border_right = borders[1];
border_bottom = borders[2];
break;
case 4:
default:
border_top = borders[0];
border_right = borders[1];
border_bottom = borders[2];
border_left = borders[3];
break;
}
if (decl->parent_statement != NULL)
base_stylesheet = decl->parent_statement->parent_sheet;
else
base_stylesheet = NULL;
filename = _st_theme_resolve_url (node->theme, base_stylesheet, url);
if (filename == NULL)
goto next_property;
node->border_image = st_border_image_new (filename,
border_top, border_right, border_bottom, border_left);
g_free (filename);
return node->border_image;
}
next_property:
;
}
return NULL;
}
/**
* st_theme_node_get_horizontal_padding:
* @node: a #StThemeNode
*
* Gets the total horizonal padding (left + right padding)
*
* Return value: the total horizonal padding
* in pixels
*/
double
st_theme_node_get_horizontal_padding (StThemeNode *node)
{
double padding = 0.0;
padding += st_theme_node_get_padding (node, ST_SIDE_LEFT);
padding += st_theme_node_get_padding (node, ST_SIDE_RIGHT);
return padding;
}
/**
* st_theme_node_get_vertical_padding:
* @node: a #StThemeNode
*
* Gets the total vertical padding (top + bottom padding)
*
* Return value: the total vertical padding
* in pixels
*/
double
st_theme_node_get_vertical_padding (StThemeNode *node)
{
double padding = 0.0;
padding += st_theme_node_get_padding (node, ST_SIDE_TOP);
padding += st_theme_node_get_padding (node, ST_SIDE_BOTTOM);
return padding;
}
static GetFromTermResult
parse_shadow_property (StThemeNode *node,
CRDeclaration *decl,
ClutterColor *color,
gdouble *xoffset,
gdouble *yoffset,
gdouble *blur,
gdouble *spread,
gboolean *inset)
{
GetFromTermResult result;
CRTerm *term;
int n_offsets = 0;
/* default values */
color->red = 0x0; color->green = 0x0; color->blue = 0x0; color->alpha = 0xff;
*xoffset = 0.;
*yoffset = 0.;
*blur = 0.;
*spread = 0.;
*inset = FALSE;
/* The CSS3 draft of the box-shadow property[0] is a lot stricter
* regarding the order of terms:
* If the 'inset' keyword is specified, it has to be first or last,
* and the color may not be mixed with the lengths; while we parse
* length values in the correct order, we allow for arbitrary
* placement of the color and 'inset' keyword.
*
* [0] http://www.w3.org/TR/css3-background/#box-shadow
*/
for (term = decl->value; term; term = term->next)
{
if (term->type == TERM_NUMBER)
{
gdouble value;
gdouble multiplier;
multiplier = (term->unary_op == MINUS_UOP) ? -1. : 1.;
result = get_length_from_term (node, term, FALSE, &value);
if (result == VALUE_INHERIT)
{
/* we only allow inherit on the line by itself */
if (n_offsets > 0)
return VALUE_NOT_FOUND;
else
return VALUE_INHERIT;
}
else if (result == VALUE_FOUND)
{
switch (n_offsets++)
{
case 0:
*xoffset = multiplier * value;
break;
case 1:
*yoffset = multiplier * value;
break;
case 2:
if (multiplier < 0)
g_warning ("Negative blur values are "
"not allowed");
*blur = value;
break;
case 3:
if (multiplier < 0)
g_warning ("Negative spread values are "
"not allowed");
*spread = value;
break;
}
continue;
}
}
else if (term->type == TERM_IDENT &&
strcmp (term->content.str->stryng->str, "inset") == 0)
{
*inset = TRUE;
continue;
}
result = get_color_from_term (node, term, color);
if (result == VALUE_INHERIT)
{
if (n_offsets > 0)
return VALUE_NOT_FOUND;
else
return VALUE_INHERIT;
}
else if (result == VALUE_FOUND)
{
continue;
}
}
/* The only required terms are the x and y offsets
*/
if (n_offsets >= 2)
return VALUE_FOUND;
else
return VALUE_NOT_FOUND;
}
/**
* st_theme_node_lookup_shadow:
* @node: a #StThemeNode
* @property_name: The name of the shadow property
* @inherit: if %TRUE, if a value is not found for the property on the
* node, then it will be looked up on the parent node, and then on the
* parent's parent, and so forth. Note that if the property has a
* value of 'inherit' it will be inherited even if %FALSE is passed
* in for @inherit; this only affects the default behavior for inheritance.
* @shadow: (out): location to store the shadow
*
* If the property is not found, the value in the shadow variable will not
* be changed.
*
* Generically looks up a property containing a set of shadow values. When
* specific getters (like st_theme_node_get_box_shadow ()) exist, they
* should be used instead. They are cached, so more efficient, and have
* handling for shortcut properties and other details of CSS.
*
* See also st_theme_node_get_shadow(), which provides a simpler API.
*
* Return value: %TRUE if the property was found in the properties for this
* theme node (or in the properties of parent nodes when inheriting.)
*/
gboolean
st_theme_node_lookup_shadow (StThemeNode *node,
const char *property_name,
gboolean inherit,
StShadow **shadow)
{
ClutterColor color = { 0., };
gdouble xoffset = 0.;
gdouble yoffset = 0.;
gdouble blur = 0.;
gdouble spread = 0.;
gboolean inset = FALSE;
int i;
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0; i--)
{
CRDeclaration *decl = node->properties[i];
if (strcmp (decl->property->stryng->str, property_name) == 0)
{
GetFromTermResult result = parse_shadow_property (node,
decl,
&color,
&xoffset,
&yoffset,
&blur,
&spread,
&inset);
if (result == VALUE_FOUND)
{
*shadow = st_shadow_new (&color,
xoffset, yoffset,
blur, spread,
inset);
return TRUE;
}
else if (result == VALUE_INHERIT)
{
if (node->parent_node)
return st_theme_node_lookup_shadow (node->parent_node,
property_name,
inherit,
shadow);
else
break;
}
}
}
if (inherit && node->parent_node)
return st_theme_node_lookup_shadow (node->parent_node,
property_name,
inherit,
shadow);
return FALSE;
}
/**
* st_theme_node_get_shadow:
* @node: a #StThemeNode
* @property_name: The name of the shadow property
*
* Generically looks up a property containing a set of shadow values. When
* specific getters (like st_theme_node_get_box_shadow()) exist, they
* should be used instead. They are cached, so more efficient, and have
* handling for shortcut properties and other details of CSS.
*
* Like st_theme_get_length(), this does not print a warning if the property is
* not found; it just returns %NULL
*
* See also st_theme_node_lookup_shadow (), which provides more options.
*
* Return value: (transfer full): the shadow, or %NULL if the property was not found.
*/
StShadow *
st_theme_node_get_shadow (StThemeNode *node,
const char *property_name)
{
StShadow *shadow;
if (st_theme_node_lookup_shadow (node, property_name, FALSE, &shadow))
return shadow;
else
return NULL;
}
/**
* st_theme_node_get_box_shadow:
* @node: a #StThemeNode
*
* Gets the value for the box-shadow style property
*
* Return value: (transfer none): the node's shadow, or %NULL
* if node has no shadow
*/
StShadow *
st_theme_node_get_box_shadow (StThemeNode *node)
{
StShadow *shadow;
if (node->box_shadow_computed)
return node->box_shadow;
node->box_shadow = NULL;
node->box_shadow_computed = TRUE;
if (st_theme_node_lookup_shadow (node,
"box-shadow",
FALSE,
&shadow))
{
node->box_shadow = shadow;
return node->box_shadow;
}
return NULL;
}
/**
* st_theme_node_get_background_image_shadow:
* @node: a #StThemeNode
*
* Gets the value for the -st-background-image-shadow style property
*
* Return value: (transfer none): the node's background image shadow, or %NULL
* if node has no such shadow
*/
StShadow *
st_theme_node_get_background_image_shadow (StThemeNode *node)
{
StShadow *shadow;
if (node->background_image_shadow_computed)
return node->background_image_shadow;
node->background_image_shadow = NULL;
node->background_image_shadow_computed = TRUE;
if (st_theme_node_lookup_shadow (node,
"-st-background-image-shadow",
FALSE,
&shadow))
{
if (shadow->inset)
{
g_warning ("The -st-background-image-shadow property does not "
"support inset shadows");
st_shadow_unref (shadow);
shadow = NULL;
}
node->background_image_shadow = shadow;
return node->background_image_shadow;
}
return NULL;
}
/**
* st_theme_node_get_text_shadow:
* @node: a #StThemeNode
*
* Gets the value for the text-shadow style property
*
* Return value: (transfer none): the node's text-shadow, or %NULL
* if node has no text-shadow
*/
StShadow *
st_theme_node_get_text_shadow (StThemeNode *node)
{
StShadow *result = NULL;
if (node->text_shadow_computed)
return node->text_shadow;
ensure_properties (node);
if (!st_theme_node_lookup_shadow (node,
"text-shadow",
FALSE,
&result))
{
if (node->parent_node)
{
result = st_theme_node_get_text_shadow (node->parent_node);
if (result)
st_shadow_ref (result);
}
}
if (result && result->inset)
{
g_warning ("The text-shadow property does not support inset shadows");
st_shadow_unref (result);
result = NULL;
}
node->text_shadow = result;
node->text_shadow_computed = TRUE;
return result;
}
/**
* st_theme_node_get_icon_colors:
* @node: a #StThemeNode
*
* Gets the colors that should be used for colorizing symbolic icons according
* the style of this node.
*
* Return value: (transfer none): the icon colors to use for this theme node
*/
StIconColors *
st_theme_node_get_icon_colors (StThemeNode *node)
{
/* Foreground here will always be the same as st_theme_node_get_foreground_color(),
* but there's a loss of symmetry and little efficiency win if we try to exploit
* that. */
enum {
FOREGROUND = 1 << 0,
WARNING = 1 << 1,
ERROR = 1 << 2,
SUCCESS = 1 << 3
};
gboolean shared_with_parent;
int i;
ClutterColor color = { 0, };
guint still_need = FOREGROUND | WARNING | ERROR | SUCCESS;
g_return_val_if_fail (ST_IS_THEME_NODE (node), NULL);
if (node->icon_colors)
return node->icon_colors;
if (node->parent_node)
{
node->icon_colors = st_theme_node_get_icon_colors (node->parent_node);
shared_with_parent = TRUE;
}
else
{
node->icon_colors = st_icon_colors_new ();
node->icon_colors->foreground = BLACK_COLOR;
node->icon_colors->warning = DEFAULT_WARNING_COLOR;
node->icon_colors->error = DEFAULT_ERROR_COLOR;
node->icon_colors->success = DEFAULT_SUCCESS_COLOR;
shared_with_parent = FALSE;
}
ensure_properties (node);
for (i = node->n_properties - 1; i >= 0 && still_need != 0; i--)
{
CRDeclaration *decl = node->properties[i];
GetFromTermResult result = VALUE_NOT_FOUND;
guint found = 0;
if ((still_need & FOREGROUND) != 0 &&
strcmp (decl->property->stryng->str, "color") == 0)
{
found = FOREGROUND;
result = get_color_from_term (node, decl->value, &color);
}
else if ((still_need & WARNING) != 0 &&
strcmp (decl->property->stryng->str, "warning-color") == 0)
{
found = WARNING;
result = get_color_from_term (node, decl->value, &color);
}
else if ((still_need & ERROR) != 0 &&
strcmp (decl->property->stryng->str, "error-color") == 0)
{
found = ERROR;
result = get_color_from_term (node, decl->value, &color);
}
else if ((still_need & SUCCESS) != 0 &&
strcmp (decl->property->stryng->str, "success-color") == 0)
{
found = SUCCESS;
result = get_color_from_term (node, decl->value, &color);
}
if (result == VALUE_INHERIT)
{
still_need &= ~found;
}
else if (result == VALUE_FOUND)
{
still_need &= ~found;
if (shared_with_parent)
{
node->icon_colors = st_icon_colors_copy (node->icon_colors);
shared_with_parent = FALSE;
}
switch (found)
{
case FOREGROUND:
node->icon_colors->foreground = color;
break;
case WARNING:
node->icon_colors->warning = color;
break;
case ERROR:
node->icon_colors->error = color;
break;
case SUCCESS:
node->icon_colors->success = color;
break;
}
}
}
if (shared_with_parent)
st_icon_colors_ref (node->icon_colors);
return node->icon_colors;
}
static float
get_width_inc (StThemeNode *node)
{
return ((int)(0.5 + node->border_width[ST_SIDE_LEFT]) + node->padding[ST_SIDE_LEFT] +
(int)(0.5 + node->border_width[ST_SIDE_RIGHT]) + node->padding[ST_SIDE_RIGHT]);
}
static float
get_height_inc (StThemeNode *node)
{
return ((int)(0.5 + node->border_width[ST_SIDE_TOP]) + node->padding[ST_SIDE_TOP] +
(int)(0.5 + node->border_width[ST_SIDE_BOTTOM]) + node->padding[ST_SIDE_BOTTOM]);
}
/**
* st_theme_node_adjust_for_height:
* @node: a #StThemeNode
* @for_height: (inout): the "for height" to adjust
*
* Adjusts a "for height" passed to clutter_actor_get_preferred_width() to
* account for borders and padding. This is a convenience function meant
* to be called from a get_preferred_width() method of a #ClutterActor
* subclass. The value after adjustment is the height available for the actor's
* content.
*/
void
st_theme_node_adjust_for_height (StThemeNode *node,
float *for_height)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
g_return_if_fail (for_height != NULL);
if (*for_height >= 0)
{
float height_inc = get_height_inc (node);
*for_height = MAX (0, *for_height - height_inc);
}
}
/**
* st_theme_node_adjust_preferred_width:
* @node: a #StThemeNode
* @min_width_p: (inout) (allow-none): the minimum width to adjust
* @natural_width_p: (inout): the natural width to adjust
*
* Adjusts the minimum and natural width computed for an actor by
* adding on the necessary space for borders and padding and taking
* into account any minimum or maximum width. This is a convenience
* function meant to be called from the get_preferred_width() method
* of a #ClutterActor subclass
*/
void
st_theme_node_adjust_preferred_width (StThemeNode *node,
float *min_width_p,
float *natural_width_p)
{
float width_inc;
g_return_if_fail (ST_IS_THEME_NODE (node));
_st_theme_node_ensure_geometry (node);
width_inc = get_width_inc (node);
if (min_width_p)
{
if (node->min_width != -1)
*min_width_p = node->min_width;
*min_width_p += width_inc;
}
if (natural_width_p)
{
if (node->width != -1)
*natural_width_p = node->width;
if (node->max_width != -1)
*natural_width_p = MIN (*natural_width_p, node->max_width);
*natural_width_p += width_inc;
}
}
/**
* st_theme_node_adjust_for_width:
* @node: a #StThemeNode
* @for_width: (inout): the "for width" to adjust
*
* Adjusts a "for width" passed to clutter_actor_get_preferred_height() to
* account for borders and padding. This is a convenience function meant
* to be called from a get_preferred_height() method of a #ClutterActor
* subclass. The value after adjustment is the width available for the actor's
* content.
*/
void
st_theme_node_adjust_for_width (StThemeNode *node,
float *for_width)
{
g_return_if_fail (ST_IS_THEME_NODE (node));
g_return_if_fail (for_width != NULL);
if (*for_width >= 0)
{
float width_inc = get_width_inc (node);
*for_width = MAX (0, *for_width - width_inc);
}
}
/**
* st_theme_node_adjust_preferred_height:
* @node: a #StThemeNode
* @min_height_p: (inout) (allow-none): the minimum height to adjust
* @natural_height_p: (inout): the natural height to adjust
*
* Adjusts the minimum and natural height computed for an actor by
* adding on the necessary space for borders and padding and taking
* into account any minimum or maximum height. This is a convenience
* function meant to be called from the get_preferred_height() method
* of a #ClutterActor subclass
*/
void
st_theme_node_adjust_preferred_height (StThemeNode *node,
float *min_height_p,
float *natural_height_p)
{
float height_inc;
g_return_if_fail (ST_IS_THEME_NODE (node));
_st_theme_node_ensure_geometry (node);
height_inc = get_height_inc (node);
if (min_height_p)
{
if (node->min_height != -1)
*min_height_p = node->min_height;
*min_height_p += height_inc;
}
if (natural_height_p)
{
if (node->height != -1)
*natural_height_p = node->height;
if (node->max_height != -1)
*natural_height_p = MIN (*natural_height_p, node->max_height);
*natural_height_p += height_inc;
}
}
/**
* st_theme_node_get_content_box:
* @node: a #StThemeNode
* @allocation: the box allocated to a #ClutterAlctor
* @content_box: (out caller-allocates): computed box occupied by the actor's content
*
* Gets the box within an actor's allocation that contents the content
* of an actor (excluding borders and padding). This is a convenience function
* meant to be used from the allocate() or paint() methods of a #ClutterActor
* subclass.
*/
void
st_theme_node_get_content_box (StThemeNode *node,
const ClutterActorBox *allocation,
ClutterActorBox *content_box)
{
double noncontent_left, noncontent_top, noncontent_right, noncontent_bottom;
double avail_width, avail_height, content_width, content_height;
g_return_if_fail (ST_IS_THEME_NODE (node));
_st_theme_node_ensure_geometry (node);
avail_width = allocation->x2 - allocation->x1;
avail_height = allocation->y2 - allocation->y1;
noncontent_left = node->border_width[ST_SIDE_LEFT] + node->padding[ST_SIDE_LEFT];
noncontent_top = node->border_width[ST_SIDE_TOP] + node->padding[ST_SIDE_TOP];
noncontent_right = node->border_width[ST_SIDE_RIGHT] + node->padding[ST_SIDE_RIGHT];
noncontent_bottom = node->border_width[ST_SIDE_BOTTOM] + node->padding[ST_SIDE_BOTTOM];
content_box->x1 = (int)(0.5 + noncontent_left);
content_box->y1 = (int)(0.5 + noncontent_top);
content_width = avail_width - noncontent_left - noncontent_right;
if (content_width < 0)
content_width = 0;
content_height = avail_height - noncontent_top - noncontent_bottom;
if (content_height < 0)
content_height = 0;
content_box->x2 = (int)(0.5 + content_box->x1 + content_width);
content_box->y2 = (int)(0.5 + content_box->y1 + content_height);
}
/**
* st_theme_node_get_background_paint_box:
* @node: a #StThemeNode
* @allocation: the box allocated to a #ClutterActor
* @paint_box: (out caller-allocates): computed box occupied when painting the actor's background
*
* Gets the box used to paint the actor's background, including the area
* occupied by properties which paint outside the actor's assigned allocation.
*/
void
st_theme_node_get_background_paint_box (StThemeNode *node,
const ClutterActorBox *actor_box,
ClutterActorBox *paint_box)
{
StShadow *background_image_shadow;
ClutterActorBox shadow_box;
g_return_if_fail (ST_IS_THEME_NODE (node));
g_return_if_fail (actor_box != NULL);
g_return_if_fail (paint_box != NULL);
background_image_shadow = st_theme_node_get_background_image_shadow (node);
*paint_box = *actor_box;
if (!background_image_shadow)
return;
st_shadow_get_box (background_image_shadow, actor_box, &shadow_box);
paint_box->x1 = MIN (paint_box->x1, shadow_box.x1);
paint_box->x2 = MAX (paint_box->x2, shadow_box.x2);
paint_box->y1 = MIN (paint_box->y1, shadow_box.y1);
paint_box->y2 = MAX (paint_box->y2, shadow_box.y2);
}
/**
* st_theme_node_get_paint_box:
* @node: a #StThemeNode
* @allocation: the box allocated to a #ClutterActor
* @paint_box: (out caller-allocates): computed box occupied when painting the actor
*
* Gets the box used to paint the actor, including the area occupied
* by properties which paint outside the actor's assigned allocation.
* When painting @node to an offscreen buffer, this function can be
* used to determine the necessary size of the buffer.
*/
void
st_theme_node_get_paint_box (StThemeNode *node,
const ClutterActorBox *actor_box,
ClutterActorBox *paint_box)
{
StShadow *box_shadow;
ClutterActorBox shadow_box;
int outline_width;
g_return_if_fail (ST_IS_THEME_NODE (node));
g_return_if_fail (actor_box != NULL);
g_return_if_fail (paint_box != NULL);
box_shadow = st_theme_node_get_box_shadow (node);
outline_width = st_theme_node_get_outline_width (node);
st_theme_node_get_background_paint_box (node, actor_box, paint_box);
if (!box_shadow && !outline_width)
return;
paint_box->x1 -= outline_width;
paint_box->x2 += outline_width;
paint_box->y1 -= outline_width;
paint_box->y2 += outline_width;
if (box_shadow)
{
st_shadow_get_box (box_shadow, actor_box, &shadow_box);
paint_box->x1 = MIN (paint_box->x1, shadow_box.x1);
paint_box->x2 = MAX (paint_box->x2, shadow_box.x2);
paint_box->y1 = MIN (paint_box->y1, shadow_box.y1);
paint_box->y2 = MAX (paint_box->y2, shadow_box.y2);
}
}
/**
* st_theme_node_geometry_equal:
* @node: a #StThemeNode
* @other: a different #StThemeNode
*
* Tests if two theme nodes have the same borders and padding; this can be
* used to optimize having to relayout when the style applied to a Clutter
* actor changes colors without changing the geometry.
*/
gboolean
st_theme_node_geometry_equal (StThemeNode *node,
StThemeNode *other)
{
StSide side;
g_return_val_if_fail (ST_IS_THEME_NODE (node), FALSE);
g_return_val_if_fail (ST_IS_THEME_NODE (other), FALSE);
_st_theme_node_ensure_geometry (node);
_st_theme_node_ensure_geometry (other);
for (side = ST_SIDE_TOP; side <= ST_SIDE_LEFT; side++)
{
if (node->border_width[side] != other->border_width[side])
return FALSE;
if (node->padding[side] != other->padding[side])
return FALSE;
}
if (node->width != other->width || node->height != other->height)
return FALSE;
if (node->min_width != other->min_width || node->min_height != other->min_height)
return FALSE;
if (node->max_width != other->max_width || node->max_height != other->max_height)
return FALSE;
return TRUE;
}
/**
* st_theme_node_paint_equal:
* @node: a #StThemeNode
* @other: a different #StThemeNode
*
* Check if st_theme_node_paint() will paint identically for @node as it does
* for @other. Note that in some cases this function may return %TRUE even
* if there is no visible difference in the painting.
*
* Return value: %TRUE if the two theme nodes paint identically. %FALSE if the
* two nodes potentially paint differently.
*/
gboolean
st_theme_node_paint_equal (StThemeNode *node,
StThemeNode *other)
{
StBorderImage *border_image, *other_border_image;
StShadow *shadow, *other_shadow;
int i;
g_return_val_if_fail (ST_IS_THEME_NODE (node), FALSE);
g_return_val_if_fail (ST_IS_THEME_NODE (other), FALSE);
_st_theme_node_ensure_background (node);
_st_theme_node_ensure_background (other);
if (!clutter_color_equal (&node->background_color, &other->background_color))
return FALSE;
if (node->background_gradient_type != other->background_gradient_type)
return FALSE;
if (node->background_gradient_type != ST_GRADIENT_NONE &&
!clutter_color_equal (&node->background_gradient_end, &other->background_gradient_end))
return FALSE;
if (g_strcmp0 (node->background_image, other->background_image) != 0)
return FALSE;
_st_theme_node_ensure_geometry (node);
_st_theme_node_ensure_geometry (other);
for (i = 0; i < 4; i++)
{
if (node->border_width[i] != other->border_width[i])
return FALSE;
if (node->border_width[i] > 0 &&
!clutter_color_equal (&node->border_color[i], &other->border_color[i]))
return FALSE;
if (node->border_radius[i] != other->border_radius[i])
return FALSE;
}
if (node->outline_width != other->outline_width)
return FALSE;
if (node->outline_width > 0 &&
!clutter_color_equal (&node->outline_color, &other->outline_color))
return FALSE;
border_image = st_theme_node_get_border_image (node);
other_border_image = st_theme_node_get_border_image (other);
if ((border_image == NULL) != (other_border_image == NULL))
return FALSE;
if (border_image != NULL && !st_border_image_equal (border_image, other_border_image))
return FALSE;
shadow = st_theme_node_get_box_shadow (node);
other_shadow = st_theme_node_get_box_shadow (other);
if ((shadow == NULL) != (other_shadow == NULL))
return FALSE;
if (shadow != NULL && !st_shadow_equal (shadow, other_shadow))
return FALSE;
shadow = st_theme_node_get_background_image_shadow (node);
other_shadow = st_theme_node_get_background_image_shadow (other);
if ((shadow == NULL) != (other_shadow == NULL))
return FALSE;
if (shadow != NULL && !st_shadow_equal (shadow, other_shadow))
return FALSE;
return TRUE;
}
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