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rsvg-styles.c
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rsvg-styles.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 ts=4 expandtab: */
/*
rsvg-styles.c: Handle SVG styles
Copyright (C) 2000 Eazel, Inc.
Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Raph Levien <raph@artofcode.com>
*/
#include "config.h"
#include <string.h>
#include <math.h>
#include "rsvg.h"
#include "rsvg-private.h"
#include "rsvg-filter.h"
#include "rsvg-css.h"
#include "rsvg-styles.h"
#include "rsvg-shapes.h"
#include "rsvg-mask.h"
#include "rsvg-marker.h"
#include <libcroco/libcroco.h>
#define RSVG_DEFAULT_FONT "Times New Roman"
enum {
SHAPE_RENDERING_AUTO = CAIRO_ANTIALIAS_DEFAULT,
SHAPE_RENDERING_OPTIMIZE_SPEED = CAIRO_ANTIALIAS_NONE,
SHAPE_RENDERING_CRISP_EDGES = CAIRO_ANTIALIAS_NONE,
SHAPE_RENDERING_GEOMETRIC_PRECISION = CAIRO_ANTIALIAS_DEFAULT
};
enum {
TEXT_RENDERING_AUTO = CAIRO_ANTIALIAS_DEFAULT,
TEXT_RENDERING_OPTIMIZE_SPEED = CAIRO_ANTIALIAS_NONE,
TEXT_RENDERING_OPTIMIZE_LEGIBILITY = CAIRO_ANTIALIAS_DEFAULT,
TEXT_RENDERING_GEOMETRIC_PRECISION = CAIRO_ANTIALIAS_DEFAULT
};
typedef struct _StyleValueData {
gchar *value;
gboolean important;
} StyleValueData;
/*
* _rsvg_cairo_matrix_init_shear: Set up a shearing matrix.
* @dst: Where to store the resulting affine transform.
* @theta: Shear angle in degrees.
*
* Sets up a shearing matrix. In the standard libart coordinate system
* and a small value for theta, || becomes \\. Horizontal lines remain
* unchanged.
**/
static void
_rsvg_cairo_matrix_init_shear (cairo_matrix_t *dst, double theta)
{
cairo_matrix_init (dst, 1., 0., tan (theta * M_PI / 180.0), 1., 0., 0);
}
static StyleValueData *
style_value_data_new (const gchar *value, gboolean important)
{
StyleValueData *ret;
ret = g_new (StyleValueData, 1);
ret->value = g_strdup (value);
ret->important = important;
return ret;
}
static void
style_value_data_free (StyleValueData *value)
{
if (!value)
return;
g_free (value->value);
g_free (value);
}
gdouble
rsvg_viewport_percentage (gdouble width, gdouble height)
{
return sqrt (width * height);
}
gdouble
rsvg_dpi_percentage (RsvgHandle * ctx)
{
return sqrt (ctx->priv->dpi_x * ctx->priv->dpi_y);
}
void
rsvg_state_init (RsvgState * state)
{
memset (state, 0, sizeof (RsvgState));
state->parent = NULL;
cairo_matrix_init_identity (&state->affine);
cairo_matrix_init_identity (&state->personal_affine);
state->mask = NULL;
state->opacity = 0xff;
state->adobe_blend = 0;
state->fill = rsvg_paint_server_parse (NULL, NULL, "#000", 0);
state->fill_opacity = 0xff;
state->stroke_opacity = 0xff;
state->stroke_width = _rsvg_css_parse_length ("1");
state->miter_limit = 4;
state->cap = CAIRO_LINE_CAP_BUTT;
state->join = CAIRO_LINE_JOIN_MITER;
state->stop_opacity = 0xff;
state->fill_rule = CAIRO_FILL_RULE_WINDING;
state->clip_rule = CAIRO_FILL_RULE_WINDING;
state->enable_background = RSVG_ENABLE_BACKGROUND_ACCUMULATE;
state->comp_op = CAIRO_OPERATOR_OVER;
state->overflow = FALSE;
state->flood_color = 0;
state->flood_opacity = 255;
state->font_family = g_strdup (RSVG_DEFAULT_FONT);
state->font_size = _rsvg_css_parse_length ("12.0");
state->font_style = PANGO_STYLE_NORMAL;
state->font_variant = PANGO_VARIANT_NORMAL;
state->font_weight = PANGO_WEIGHT_NORMAL;
state->font_stretch = PANGO_STRETCH_NORMAL;
state->text_dir = PANGO_DIRECTION_LTR;
state->text_gravity = PANGO_GRAVITY_SOUTH;
state->unicode_bidi = UNICODE_BIDI_NORMAL;
state->text_anchor = TEXT_ANCHOR_START;
state->letter_spacing = _rsvg_css_parse_length ("0.0");
state->visible = TRUE;
state->cond_true = TRUE;
state->filter = NULL;
state->clip_path_ref = NULL;
state->startMarker = NULL;
state->middleMarker = NULL;
state->endMarker = NULL;
state->has_current_color = FALSE;
state->has_flood_color = FALSE;
state->has_flood_opacity = FALSE;
state->has_fill_server = FALSE;
state->has_fill_opacity = FALSE;
state->has_fill_rule = FALSE;
state->has_clip_rule = FALSE;
state->has_stroke_server = FALSE;
state->has_stroke_opacity = FALSE;
state->has_stroke_width = FALSE;
state->has_miter_limit = FALSE;
state->has_cap = FALSE;
state->has_join = FALSE;
state->has_dash = FALSE;
state->has_dashoffset = FALSE;
state->has_visible = FALSE;
state->has_cond = FALSE;
state->has_stop_color = FALSE;
state->has_stop_opacity = FALSE;
state->has_font_size = FALSE;
state->has_font_family = FALSE;
state->has_lang = FALSE;
state->has_font_style = FALSE;
state->has_font_variant = FALSE;
state->has_font_weight = FALSE;
state->has_font_stretch = FALSE;
state->has_font_decor = FALSE;
state->has_text_dir = FALSE;
state->has_text_gravity = FALSE;
state->has_unicode_bidi = FALSE;
state->has_text_anchor = FALSE;
state->has_letter_spacing = FALSE;
state->has_startMarker = FALSE;
state->has_middleMarker = FALSE;
state->has_endMarker = FALSE;
state->has_overflow = FALSE;
state->shape_rendering_type = SHAPE_RENDERING_AUTO;
state->has_shape_rendering_type = FALSE;
state->text_rendering_type = TEXT_RENDERING_AUTO;
state->has_text_rendering_type = FALSE;
state->styles = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, (GDestroyNotify) style_value_data_free);
}
void
rsvg_state_reinit (RsvgState * state)
{
RsvgState *parent = state->parent;
rsvg_state_finalize (state);
rsvg_state_init (state);
state->parent = parent;
}
typedef int (*InheritanceFunction) (int dst, int src);
void
rsvg_state_clone (RsvgState * dst, const RsvgState * src)
{
gint i;
RsvgState *parent = dst->parent;
rsvg_state_finalize (dst);
*dst = *src;
dst->parent = parent;
dst->font_family = g_strdup (src->font_family);
dst->lang = g_strdup (src->lang);
rsvg_paint_server_ref (dst->fill);
rsvg_paint_server_ref (dst->stroke);
dst->styles = g_hash_table_ref (src->styles);
if (src->dash.n_dash > 0) {
dst->dash.dash = g_new (gdouble, src->dash.n_dash);
for (i = 0; i < src->dash.n_dash; i++)
dst->dash.dash[i] = src->dash.dash[i];
}
}
/*
This function is where all inheritance takes place. It is given a
base and a modifier state, as well as a function to determine
how the base is modified and a flag as to whether things that can
not be inherited are copied streight over, or ignored.
*/
static void
rsvg_state_inherit_run (RsvgState * dst, const RsvgState * src,
const InheritanceFunction function, const gboolean inherituninheritables)
{
gint i;
if (function (dst->has_current_color, src->has_current_color))
dst->current_color = src->current_color;
if (function (dst->has_flood_color, src->has_flood_color))
dst->flood_color = src->flood_color;
if (function (dst->has_flood_opacity, src->has_flood_opacity))
dst->flood_opacity = src->flood_opacity;
if (function (dst->has_fill_server, src->has_fill_server)) {
rsvg_paint_server_ref (src->fill);
if (dst->fill)
rsvg_paint_server_unref (dst->fill);
dst->fill = src->fill;
}
if (function (dst->has_fill_opacity, src->has_fill_opacity))
dst->fill_opacity = src->fill_opacity;
if (function (dst->has_fill_rule, src->has_fill_rule))
dst->fill_rule = src->fill_rule;
if (function (dst->has_clip_rule, src->has_clip_rule))
dst->clip_rule = src->clip_rule;
if (function (dst->overflow, src->overflow))
dst->overflow = src->overflow;
if (function (dst->has_stroke_server, src->has_stroke_server)) {
rsvg_paint_server_ref (src->stroke);
if (dst->stroke)
rsvg_paint_server_unref (dst->stroke);
dst->stroke = src->stroke;
}
if (function (dst->has_stroke_opacity, src->has_stroke_opacity))
dst->stroke_opacity = src->stroke_opacity;
if (function (dst->has_stroke_width, src->has_stroke_width))
dst->stroke_width = src->stroke_width;
if (function (dst->has_miter_limit, src->has_miter_limit))
dst->miter_limit = src->miter_limit;
if (function (dst->has_cap, src->has_cap))
dst->cap = src->cap;
if (function (dst->has_join, src->has_join))
dst->join = src->join;
if (function (dst->has_stop_color, src->has_stop_color))
dst->stop_color = src->stop_color;
if (function (dst->has_stop_opacity, src->has_stop_opacity))
dst->stop_opacity = src->stop_opacity;
if (function (dst->has_cond, src->has_cond))
dst->cond_true = src->cond_true;
if (function (dst->has_font_size, src->has_font_size))
dst->font_size = src->font_size;
if (function (dst->has_font_style, src->has_font_style))
dst->font_style = src->font_style;
if (function (dst->has_font_variant, src->has_font_variant))
dst->font_variant = src->font_variant;
if (function (dst->has_font_weight, src->has_font_weight))
dst->font_weight = src->font_weight;
if (function (dst->has_font_stretch, src->has_font_stretch))
dst->font_stretch = src->font_stretch;
if (function (dst->has_font_decor, src->has_font_decor))
dst->font_decor = src->font_decor;
if (function (dst->has_text_dir, src->has_text_dir))
dst->text_dir = src->text_dir;
if (function (dst->has_text_gravity, src->has_text_gravity))
dst->text_gravity = src->text_gravity;
if (function (dst->has_unicode_bidi, src->has_unicode_bidi))
dst->unicode_bidi = src->unicode_bidi;
if (function (dst->has_text_anchor, src->has_text_anchor))
dst->text_anchor = src->text_anchor;
if (function (dst->has_letter_spacing, src->has_letter_spacing))
dst->letter_spacing = src->letter_spacing;
if (function (dst->has_startMarker, src->has_startMarker))
dst->startMarker = src->startMarker;
if (function (dst->has_middleMarker, src->has_middleMarker))
dst->middleMarker = src->middleMarker;
if (function (dst->has_endMarker, src->has_endMarker))
dst->endMarker = src->endMarker;
if (function (dst->has_shape_rendering_type, src->has_shape_rendering_type))
dst->shape_rendering_type = src->shape_rendering_type;
if (function (dst->has_text_rendering_type, src->has_text_rendering_type))
dst->text_rendering_type = src->text_rendering_type;
if (function (dst->has_font_family, src->has_font_family)) {
g_free (dst->font_family); /* font_family is always set to something */
dst->font_family = g_strdup (src->font_family);
}
if (function (dst->has_space_preserve, src->has_space_preserve))
dst->space_preserve = src->space_preserve;
if (function (dst->has_visible, src->has_visible))
dst->visible = src->visible;
if (function (dst->has_lang, src->has_lang)) {
if (dst->has_lang)
g_free (dst->lang);
dst->lang = g_strdup (src->lang);
}
if (src->dash.n_dash > 0 && (function (dst->has_dash, src->has_dash))) {
if (dst->has_dash)
g_free (dst->dash.dash);
dst->dash.dash = g_new (gdouble, src->dash.n_dash);
dst->dash.n_dash = src->dash.n_dash;
for (i = 0; i < src->dash.n_dash; i++)
dst->dash.dash[i] = src->dash.dash[i];
}
if (function (dst->has_dashoffset, src->has_dashoffset)) {
dst->dash.offset = src->dash.offset;
}
if (inherituninheritables) {
dst->clip_path_ref = src->clip_path_ref;
dst->mask = src->mask;
dst->enable_background = src->enable_background;
dst->adobe_blend = src->adobe_blend;
dst->opacity = src->opacity;
dst->filter = src->filter;
dst->comp_op = src->comp_op;
}
}
/*
reinherit is given dst which is the top of the state stack
and src which is the layer before in the state stack from
which it should be inherited from
*/
static int
reinheritfunction (int dst, int src)
{
if (!dst)
return 1;
return 0;
}
void
rsvg_state_reinherit (RsvgState * dst, const RsvgState * src)
{
rsvg_state_inherit_run (dst, src, reinheritfunction, 0);
}
/*
dominate is given dst which is the top of the state stack
and src which is the layer before in the state stack from
which it should be inherited from, however if anything is
directly specified in src (the second last layer) it will
override anything on the top layer, this is for overrides
in use tags
*/
static int
dominatefunction (int dst, int src)
{
if (!dst || src)
return 1;
return 0;
}
void
rsvg_state_dominate (RsvgState * dst, const RsvgState * src)
{
rsvg_state_inherit_run (dst, src, dominatefunction, 0);
}
/* copy everything inheritable from the src to the dst */
static int
clonefunction (int dst, int src)
{
return 1;
}
void
rsvg_state_override (RsvgState * dst, const RsvgState * src)
{
rsvg_state_inherit_run (dst, src, clonefunction, 0);
}
/*
put something new on the inheritance stack, dst is the top of the stack,
src is the state to be integrated, this is essentially the opposite of
reinherit, because it is being given stuff to be integrated on the top,
rather than the context underneath.
*/
static int
inheritfunction (int dst, int src)
{
return src;
}
void
rsvg_state_inherit (RsvgState * dst, const RsvgState * src)
{
rsvg_state_inherit_run (dst, src, inheritfunction, 1);
}
void
rsvg_state_finalize (RsvgState * state)
{
g_free (state->font_family);
g_free (state->lang);
rsvg_paint_server_unref (state->fill);
rsvg_paint_server_unref (state->stroke);
if (state->dash.n_dash != 0)
g_free (state->dash.dash);
if (state->styles) {
g_hash_table_unref (state->styles);
state->styles = NULL;
}
}
/* Parse a CSS2 style argument, setting the SVG context attributes. */
static void
rsvg_parse_style_pair (RsvgHandle * ctx,
RsvgState * state,
const gchar * name,
const gchar * value,
gboolean important)
{
StyleValueData *data;
data = g_hash_table_lookup (state->styles, name);
if (data && data->important && !important)
return;
if (name == NULL || value == NULL)
return;
g_hash_table_insert (state->styles,
(gpointer) g_strdup (name),
(gpointer) style_value_data_new (value, important));
if (g_str_equal (name, "color"))
state->current_color = rsvg_css_parse_color (value, &state->has_current_color);
else if (g_str_equal (name, "opacity"))
state->opacity = rsvg_css_parse_opacity (value);
else if (g_str_equal (name, "flood-color"))
state->flood_color = rsvg_css_parse_color (value, &state->has_flood_color);
else if (g_str_equal (name, "flood-opacity")) {
state->flood_opacity = rsvg_css_parse_opacity (value);
state->has_flood_opacity = TRUE;
} else if (g_str_equal (name, "filter"))
state->filter = rsvg_filter_parse (ctx->priv->defs, value);
else if (g_str_equal (name, "a:adobe-blending-mode")) {
if (g_str_equal (value, "normal"))
state->adobe_blend = 0;
else if (g_str_equal (value, "multiply"))
state->adobe_blend = 1;
else if (g_str_equal (value, "screen"))
state->adobe_blend = 2;
else if (g_str_equal (value, "darken"))
state->adobe_blend = 3;
else if (g_str_equal (value, "lighten"))
state->adobe_blend = 4;
else if (g_str_equal (value, "softlight"))
state->adobe_blend = 5;
else if (g_str_equal (value, "hardlight"))
state->adobe_blend = 6;
else if (g_str_equal (value, "colordodge"))
state->adobe_blend = 7;
else if (g_str_equal (value, "colorburn"))
state->adobe_blend = 8;
else if (g_str_equal (value, "overlay"))
state->adobe_blend = 9;
else if (g_str_equal (value, "exclusion"))
state->adobe_blend = 10;
else if (g_str_equal (value, "difference"))
state->adobe_blend = 11;
else
state->adobe_blend = 0;
} else if (g_str_equal (name, "mask"))
state->mask = rsvg_mask_parse (ctx->priv->defs, value);
else if (g_str_equal (name, "clip-path")) {
state->clip_path_ref = rsvg_clip_path_parse (ctx->priv->defs, value);
} else if (g_str_equal (name, "overflow")) {
if (!g_str_equal (value, "inherit")) {
state->overflow = rsvg_css_parse_overflow (value, &state->has_overflow);
}
} else if (g_str_equal (name, "enable-background")) {
if (g_str_equal (value, "new"))
state->enable_background = RSVG_ENABLE_BACKGROUND_NEW;
else
state->enable_background = RSVG_ENABLE_BACKGROUND_ACCUMULATE;
} else if (g_str_equal (name, "comp-op")) {
if (g_str_equal (value, "clear"))
state->comp_op = CAIRO_OPERATOR_CLEAR;
else if (g_str_equal (value, "src"))
state->comp_op = CAIRO_OPERATOR_SOURCE;
else if (g_str_equal (value, "dst"))
state->comp_op = CAIRO_OPERATOR_DEST;
else if (g_str_equal (value, "src-over"))
state->comp_op = CAIRO_OPERATOR_OVER;
else if (g_str_equal (value, "dst-over"))
state->comp_op = CAIRO_OPERATOR_DEST_OVER;
else if (g_str_equal (value, "src-in"))
state->comp_op = CAIRO_OPERATOR_IN;
else if (g_str_equal (value, "dst-in"))
state->comp_op = CAIRO_OPERATOR_DEST_IN;
else if (g_str_equal (value, "src-out"))
state->comp_op = CAIRO_OPERATOR_OUT;
else if (g_str_equal (value, "dst-out"))
state->comp_op = CAIRO_OPERATOR_DEST_OUT;
else if (g_str_equal (value, "src-atop"))
state->comp_op = CAIRO_OPERATOR_ATOP;
else if (g_str_equal (value, "dst-atop"))
state->comp_op = CAIRO_OPERATOR_DEST_ATOP;
else if (g_str_equal (value, "xor"))
state->comp_op = CAIRO_OPERATOR_XOR;
else if (g_str_equal (value, "plus"))
state->comp_op = CAIRO_OPERATOR_ADD;
else if (g_str_equal (value, "multiply"))
state->comp_op = CAIRO_OPERATOR_MULTIPLY;
else if (g_str_equal (value, "screen"))
state->comp_op = CAIRO_OPERATOR_SCREEN;
else if (g_str_equal (value, "overlay"))
state->comp_op = CAIRO_OPERATOR_OVERLAY;
else if (g_str_equal (value, "darken"))
state->comp_op = CAIRO_OPERATOR_DARKEN;
else if (g_str_equal (value, "lighten"))
state->comp_op = CAIRO_OPERATOR_LIGHTEN;
else if (g_str_equal (value, "color-dodge"))
state->comp_op = CAIRO_OPERATOR_COLOR_DODGE;
else if (g_str_equal (value, "color-burn"))
state->comp_op = CAIRO_OPERATOR_COLOR_BURN;
else if (g_str_equal (value, "hard-light"))
state->comp_op = CAIRO_OPERATOR_HARD_LIGHT;
else if (g_str_equal (value, "soft-light"))
state->comp_op = CAIRO_OPERATOR_SOFT_LIGHT;
else if (g_str_equal (value, "difference"))
state->comp_op = CAIRO_OPERATOR_DIFFERENCE;
else if (g_str_equal (value, "exclusion"))
state->comp_op = CAIRO_OPERATOR_EXCLUSION;
else
state->comp_op = CAIRO_OPERATOR_OVER;
} else if (g_str_equal (name, "display")) {
state->has_visible = TRUE;
if (g_str_equal (value, "none"))
state->visible = FALSE;
else if (!g_str_equal (value, "inherit") != 0)
state->visible = TRUE;
else
state->has_visible = FALSE;
} else if (g_str_equal (name, "xml:space")) {
state->has_space_preserve = TRUE;
if (g_str_equal (value, "default"))
state->space_preserve = FALSE;
else if (!g_str_equal (value, "preserve") == 0)
state->space_preserve = TRUE;
else
state->space_preserve = FALSE;
} else if (g_str_equal (name, "visibility")) {
state->has_visible = TRUE;
if (g_str_equal (value, "visible"))
state->visible = TRUE;
else if (!g_str_equal (value, "inherit") != 0)
state->visible = FALSE; /* collapse or hidden */
else
state->has_visible = FALSE;
} else if (g_str_equal (name, "fill")) {
RsvgPaintServer *fill = state->fill;
state->fill =
rsvg_paint_server_parse (&state->has_fill_server, ctx->priv->defs, value, 0);
rsvg_paint_server_unref (fill);
} else if (g_str_equal (name, "fill-opacity")) {
state->fill_opacity = rsvg_css_parse_opacity (value);
state->has_fill_opacity = TRUE;
} else if (g_str_equal (name, "fill-rule")) {
state->has_fill_rule = TRUE;
if (g_str_equal (value, "nonzero"))
state->fill_rule = CAIRO_FILL_RULE_WINDING;
else if (g_str_equal (value, "evenodd"))
state->fill_rule = CAIRO_FILL_RULE_EVEN_ODD;
else
state->has_fill_rule = FALSE;
} else if (g_str_equal (name, "clip-rule")) {
state->has_clip_rule = TRUE;
if (g_str_equal (value, "nonzero"))
state->clip_rule = CAIRO_FILL_RULE_WINDING;
else if (g_str_equal (value, "evenodd"))
state->clip_rule = CAIRO_FILL_RULE_EVEN_ODD;
else
state->has_clip_rule = FALSE;
} else if (g_str_equal (name, "stroke")) {
RsvgPaintServer *stroke = state->stroke;
state->stroke =
rsvg_paint_server_parse (&state->has_stroke_server, ctx->priv->defs, value, 0);
rsvg_paint_server_unref (stroke);
} else if (g_str_equal (name, "stroke-width")) {
state->stroke_width = _rsvg_css_parse_length (value);
state->has_stroke_width = TRUE;
} else if (g_str_equal (name, "stroke-linecap")) {
state->has_cap = TRUE;
if (g_str_equal (value, "butt"))
state->cap = CAIRO_LINE_CAP_BUTT;
else if (g_str_equal (value, "round"))
state->cap = CAIRO_LINE_CAP_ROUND;
else if (g_str_equal (value, "square"))
state->cap = CAIRO_LINE_CAP_SQUARE;
else
g_warning (_("unknown line cap style %s\n"), value);
} else if (g_str_equal (name, "stroke-opacity")) {
state->stroke_opacity = rsvg_css_parse_opacity (value);
state->has_stroke_opacity = TRUE;
} else if (g_str_equal (name, "stroke-linejoin")) {
state->has_join = TRUE;
if (g_str_equal (value, "miter"))
state->join = CAIRO_LINE_JOIN_MITER;
else if (g_str_equal (value, "round"))
state->join = CAIRO_LINE_JOIN_ROUND;
else if (g_str_equal (value, "bevel"))
state->join = CAIRO_LINE_JOIN_BEVEL;
else
g_warning (_("unknown line join style %s\n"), value);
} else if (g_str_equal (name, "font-size")) {
state->font_size = _rsvg_css_parse_length (value);
state->has_font_size = TRUE;
} else if (g_str_equal (name, "font-family")) {
char *save = g_strdup (rsvg_css_parse_font_family (value, &state->has_font_family));
g_free (state->font_family);
state->font_family = save;
} else if (g_str_equal (name, "xml:lang")) {
char *save = g_strdup (value);
g_free (state->lang);
state->lang = save;
state->has_lang = TRUE;
} else if (g_str_equal (name, "font-style")) {
state->font_style = rsvg_css_parse_font_style (value, &state->has_font_style);
} else if (g_str_equal (name, "font-variant")) {
state->font_variant = rsvg_css_parse_font_variant (value, &state->has_font_variant);
} else if (g_str_equal (name, "font-weight")) {
state->font_weight = rsvg_css_parse_font_weight (value, &state->has_font_weight);
} else if (g_str_equal (name, "font-stretch")) {
state->font_stretch = rsvg_css_parse_font_stretch (value, &state->has_font_stretch);
} else if (g_str_equal (name, "text-decoration")) {
if (g_str_equal (value, "inherit")) {
state->has_font_decor = FALSE;
state->font_decor = TEXT_NORMAL;
} else {
if (strstr (value, "underline"))
state->font_decor |= TEXT_UNDERLINE;
if (strstr (value, "overline"))
state->font_decor |= TEXT_OVERLINE;
if (strstr (value, "strike") || strstr (value, "line-through")) /* strike though or line-through */
state->font_decor |= TEXT_STRIKE;
state->has_font_decor = TRUE;
}
} else if (g_str_equal (name, "direction")) {
state->has_text_dir = TRUE;
if (g_str_equal (value, "inherit")) {
state->text_dir = PANGO_DIRECTION_LTR;
state->has_text_dir = FALSE;
} else if (g_str_equal (value, "rtl"))
state->text_dir = PANGO_DIRECTION_RTL;
else /* ltr */
state->text_dir = PANGO_DIRECTION_LTR;
} else if (g_str_equal (name, "unicode-bidi")) {
state->has_unicode_bidi = TRUE;
if (g_str_equal (value, "inherit")) {
state->unicode_bidi = UNICODE_BIDI_NORMAL;
state->has_unicode_bidi = FALSE;
} else if (g_str_equal (value, "embed"))
state->unicode_bidi = UNICODE_BIDI_EMBED;
else if (g_str_equal (value, "bidi-override"))
state->unicode_bidi = UNICODE_BIDI_OVERRIDE;
else /* normal */
state->unicode_bidi = UNICODE_BIDI_NORMAL;
} else if (g_str_equal (name, "writing-mode")) {
/* TODO: these aren't quite right... */
state->has_text_dir = TRUE;
state->has_text_gravity = TRUE;
if (g_str_equal (value, "inherit")) {
state->text_dir = PANGO_DIRECTION_LTR;
state->has_text_dir = FALSE;
state->text_gravity = PANGO_GRAVITY_SOUTH;
state->has_text_gravity = FALSE;
} else if (g_str_equal (value, "lr-tb") || g_str_equal (value, "lr")) {
state->text_dir = PANGO_DIRECTION_LTR;
state->text_gravity = PANGO_GRAVITY_SOUTH;
} else if (g_str_equal (value, "rl-tb") || g_str_equal (value, "rl")) {
state->text_dir = PANGO_DIRECTION_RTL;
state->text_gravity = PANGO_GRAVITY_SOUTH;
} else if (g_str_equal (value, "tb-rl") || g_str_equal (value, "tb")) {
state->text_dir = PANGO_DIRECTION_LTR;
state->text_gravity = PANGO_GRAVITY_EAST;
}
} else if (g_str_equal (name, "text-anchor")) {
state->has_text_anchor = TRUE;
if (g_str_equal (value, "inherit")) {
state->text_anchor = TEXT_ANCHOR_START;
state->has_text_anchor = FALSE;
} else {
if (strstr (value, "start"))
state->text_anchor = TEXT_ANCHOR_START;
else if (strstr (value, "middle"))
state->text_anchor = TEXT_ANCHOR_MIDDLE;
else if (strstr (value, "end"))
state->text_anchor = TEXT_ANCHOR_END;
}
} else if (g_str_equal (name, "letter-spacing")) {
state->has_letter_spacing = TRUE;
state->letter_spacing = _rsvg_css_parse_length (value);
} else if (g_str_equal (name, "stop-color")) {
if (!g_str_equal (value, "inherit")) {
state->stop_color = rsvg_css_parse_color (value, &state->has_stop_color);
}
} else if (g_str_equal (name, "stop-opacity")) {
if (!g_str_equal (value, "inherit")) {
state->has_stop_opacity = TRUE;
state->stop_opacity = rsvg_css_parse_opacity (value);
}
} else if (g_str_equal (name, "marker-start")) {
state->startMarker = rsvg_marker_parse (ctx->priv->defs, value);
state->has_startMarker = TRUE;
} else if (g_str_equal (name, "marker-mid")) {
state->middleMarker = rsvg_marker_parse (ctx->priv->defs, value);
state->has_middleMarker = TRUE;
} else if (g_str_equal (name, "marker-end")) {
state->endMarker = rsvg_marker_parse (ctx->priv->defs, value);
state->has_endMarker = TRUE;
} else if (g_str_equal (name, "stroke-miterlimit")) {
state->has_miter_limit = TRUE;
state->miter_limit = g_ascii_strtod (value, NULL);
} else if (g_str_equal (name, "stroke-dashoffset")) {
state->has_dashoffset = TRUE;
state->dash.offset = _rsvg_css_parse_length (value);
if (state->dash.offset.length < 0.)
state->dash.offset.length = 0.;
} else if (g_str_equal (name, "shape-rendering")) {
state->has_shape_rendering_type = TRUE;
if (g_str_equal (value, "auto") || g_str_equal (value, "default"))
state->shape_rendering_type = SHAPE_RENDERING_AUTO;
else if (g_str_equal (value, "optimizeSpeed"))
state->shape_rendering_type = SHAPE_RENDERING_OPTIMIZE_SPEED;
else if (g_str_equal (value, "crispEdges"))
state->shape_rendering_type = SHAPE_RENDERING_CRISP_EDGES;
else if (g_str_equal (value, "geometricPrecision"))
state->shape_rendering_type = SHAPE_RENDERING_GEOMETRIC_PRECISION;
} else if (g_str_equal (name, "text-rendering")) {
state->has_text_rendering_type = TRUE;
if (g_str_equal (value, "auto") || g_str_equal (value, "default"))
state->text_rendering_type = TEXT_RENDERING_AUTO;
else if (g_str_equal (value, "optimizeSpeed"))
state->text_rendering_type = TEXT_RENDERING_OPTIMIZE_SPEED;
else if (g_str_equal (value, "optimizeLegibility"))
state->text_rendering_type = TEXT_RENDERING_OPTIMIZE_LEGIBILITY;
else if (g_str_equal (value, "geometricPrecision"))
state->text_rendering_type = TEXT_RENDERING_GEOMETRIC_PRECISION;
} else if (g_str_equal (name, "stroke-dasharray")) {
state->has_dash = TRUE;
if (g_str_equal (value, "none")) {
if (state->dash.n_dash != 0) {
/* free any cloned dash data */
g_free (state->dash.dash);
state->dash.n_dash = 0;
}
} else {
gchar **dashes = g_strsplit (value, ",", -1);
if (NULL != dashes) {
gint n_dashes, i;
gboolean is_even = FALSE;
gdouble total = 0;
/* count the #dashes */
for (n_dashes = 0; dashes[n_dashes] != NULL; n_dashes++);
is_even = (n_dashes % 2 == 0);
state->dash.n_dash = (is_even ? n_dashes : n_dashes * 2);
state->dash.dash = g_new (double, state->dash.n_dash);
/* TODO: handle negative value == error case */
/* the even and base case */
for (i = 0; i < n_dashes; i++) {
state->dash.dash[i] = g_ascii_strtod (dashes[i], NULL);
total += state->dash.dash[i];
}
/* if an odd number of dashes is found, it gets repeated */
if (!is_even)
for (; i < state->dash.n_dash; i++)
state->dash.dash[i] = state->dash.dash[i - n_dashes];
g_strfreev (dashes);
/* If the dashes add up to 0, then it should
be ignored */
if (total == 0) {
g_free (state->dash.dash);
state->dash.n_dash = 0;
}
}
}
}
}
static void
rsvg_lookup_parse_style_pair (RsvgHandle * ctx, RsvgState * state,
const char *key, RsvgPropertyBag * atts)
{
const char *value;
if ((value = rsvg_property_bag_lookup (atts, key)) != NULL)
rsvg_parse_style_pair (ctx, state, key, value, FALSE);
}
/* take a pair of the form (fill="#ff00ff") and parse it as a style */
void
rsvg_parse_style_pairs (RsvgHandle * ctx, RsvgState * state, RsvgPropertyBag * atts)
{
rsvg_lookup_parse_style_pair (ctx, state, "a:adobe-blending-mode", atts);
rsvg_lookup_parse_style_pair (ctx, state, "clip-path", atts);
rsvg_lookup_parse_style_pair (ctx, state, "clip-rule", atts);
rsvg_lookup_parse_style_pair (ctx, state, "color", atts);
rsvg_lookup_parse_style_pair (ctx, state, "direction", atts);
rsvg_lookup_parse_style_pair (ctx, state, "display", atts);
rsvg_lookup_parse_style_pair (ctx, state, "enable-background", atts);
rsvg_lookup_parse_style_pair (ctx, state, "comp-op", atts);
rsvg_lookup_parse_style_pair (ctx, state, "fill", atts);
rsvg_lookup_parse_style_pair (ctx, state, "fill-opacity", atts);
rsvg_lookup_parse_style_pair (ctx, state, "fill-rule", atts);
rsvg_lookup_parse_style_pair (ctx, state, "filter", atts);
rsvg_lookup_parse_style_pair (ctx, state, "flood-color", atts);
rsvg_lookup_parse_style_pair (ctx, state, "flood-opacity", atts);
rsvg_lookup_parse_style_pair (ctx, state, "font-family", atts);
rsvg_lookup_parse_style_pair (ctx, state, "font-size", atts);
rsvg_lookup_parse_style_pair (ctx, state, "font-stretch", atts);
rsvg_lookup_parse_style_pair (ctx, state, "font-style", atts);
rsvg_lookup_parse_style_pair (ctx, state, "font-variant", atts);
rsvg_lookup_parse_style_pair (ctx, state, "font-weight", atts);
rsvg_lookup_parse_style_pair (ctx, state, "marker-end", atts);
rsvg_lookup_parse_style_pair (ctx, state, "mask", atts);
rsvg_lookup_parse_style_pair (ctx, state, "marker-mid", atts);
rsvg_lookup_parse_style_pair (ctx, state, "marker-start", atts);
rsvg_lookup_parse_style_pair (ctx, state, "opacity", atts);
rsvg_lookup_parse_style_pair (ctx, state, "overflow", atts);
rsvg_lookup_parse_style_pair (ctx, state, "shape-rendering", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stop-color", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stop-opacity", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-dasharray", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-dashoffset", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-linecap", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-linejoin", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-miterlimit", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-opacity", atts);
rsvg_lookup_parse_style_pair (ctx, state, "stroke-width", atts);
rsvg_lookup_parse_style_pair (ctx, state, "text-anchor", atts);
rsvg_lookup_parse_style_pair (ctx, state, "text-decoration", atts);
rsvg_lookup_parse_style_pair (ctx, state, "unicode-bidi", atts);
rsvg_lookup_parse_style_pair (ctx, state, "letter-spacing", atts);
rsvg_lookup_parse_style_pair (ctx, state, "visibility", atts);
rsvg_lookup_parse_style_pair (ctx, state, "writing-mode", atts);
rsvg_lookup_parse_style_pair (ctx, state, "xml:lang", atts);
rsvg_lookup_parse_style_pair (ctx, state, "xml:space", atts);
{
/* TODO: this conditional behavior isn't quite correct, and i'm not sure it should reside here */
gboolean cond_true, has_cond;
cond_true = rsvg_eval_switch_attributes (atts, &has_cond);
if (has_cond) {
state->cond_true = cond_true;
state->has_cond = TRUE;
}
}
}
static gboolean
parse_style_value (const gchar *string, gchar **value, gboolean *important)
{
gchar **strings;
strings = g_strsplit (string, "!", 2);
if (strings == NULL || strings[0] == NULL) {
g_strfreev (strings);
return FALSE;
}
if (strings[1] != NULL && strings[2] == NULL &&
g_str_equal (g_strstrip (strings[1]), "important")) {
*important = TRUE;
} else {
*important = FALSE;
}
*value = g_strdup (g_strstrip (strings[0]));
g_strfreev (strings);
return TRUE;
}
/* Split a CSS2 style into individual style arguments, setting attributes
in the SVG context.
It's known that this is _way_ out of spec. A more complete CSS2
implementation will happen later.
*/
void
rsvg_parse_style (RsvgHandle * ctx, RsvgState * state, const char *str)
{
gchar **styles;
guint i;
styles = g_strsplit (str, ";", -1);
for (i = 0; i < g_strv_length (styles); i++) {
gchar **values;
values = g_strsplit (styles[i], ":", 2);
if (!values)
continue;
if (g_strv_length (values) == 2) {
gboolean important;
gchar *style_value = NULL;
if (parse_style_value (values[1], &style_value, &important))
rsvg_parse_style_pair (ctx, state,
g_strstrip (values[0]),
style_value,
important);
g_free (style_value);
}
g_strfreev (values);
}
g_strfreev (styles);
}
static void
rsvg_css_define_style (RsvgHandle * ctx,
const gchar * selector,
const gchar * style_name,
const gchar * style_value,
gboolean important)
{
GHashTable *styles;
gboolean need_insert = FALSE;
/* push name/style pair into HT */
styles = g_hash_table_lookup (ctx->priv->css_props, selector);
if (styles == NULL) {
styles = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, (GDestroyNotify) style_value_data_free);
g_hash_table_insert (ctx->priv->css_props, (gpointer) g_strdup (selector), styles);
need_insert = TRUE;
} else {