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rsvg-base.c
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rsvg-base.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.c: SAX-based renderer for SVG files into a GdkPixbuf.
Copyright (C) 2000 Eazel, Inc.
Copyright (C) 2002 Dom Lachowicz <[email protected]>
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 <[email protected]>
*/
#include "config.h"
#include "rsvg.h"
#include "rsvg-private.h"
#include "rsvg-css.h"
#include "rsvg-styles.h"
#include "rsvg-shapes.h"
#include "rsvg-structure.h"
#include "rsvg-image.h"
#include "rsvg-io.h"
#include "rsvg-text.h"
#include "rsvg-filter.h"
#include "rsvg-mask.h"
#include "rsvg-marker.h"
#include "rsvg-cairo-render.h"
#include <libxml/uri.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <gio/gio.h>
#include <math.h>
#include <string.h>
#include <stdarg.h>
#include "rsvg-path.h"
#include "rsvg-paint-server.h"
#include "rsvg-xml.h"
/*
* This is configurable at runtime
*/
#define RSVG_DEFAULT_DPI_X 90.0
#define RSVG_DEFAULT_DPI_Y 90.0
G_GNUC_INTERNAL
double rsvg_internal_dpi_x = RSVG_DEFAULT_DPI_X;
G_GNUC_INTERNAL
double rsvg_internal_dpi_y = RSVG_DEFAULT_DPI_Y;
static xmlSAXHandler rsvgSAXHandlerStruct;
static gboolean rsvgSAXHandlerStructInited = FALSE;
typedef struct _RsvgSaxHandlerDefs {
RsvgSaxHandler super;
RsvgHandle *ctx;
} RsvgSaxHandlerDefs;
typedef struct _RsvgSaxHandlerStyle {
RsvgSaxHandler super;
RsvgSaxHandlerDefs *parent;
RsvgHandle *ctx;
GString *style;
gboolean is_text_css;
} RsvgSaxHandlerStyle;
typedef struct {
RsvgSaxHandler super;
RsvgHandle *ctx;
const char *name;
GString *string;
GString **stringptr;
} RsvgSaxHandlerExtra;
/* hide this fact from the general public */
typedef RsvgSaxHandlerExtra RsvgSaxHandlerTitle;
typedef RsvgSaxHandlerExtra RsvgSaxHandlerDesc;
typedef RsvgSaxHandlerExtra RsvgSaxHandlerMetadata;
static void
rsvg_style_handler_free (RsvgSaxHandler * self)
{
RsvgSaxHandlerStyle *z = (RsvgSaxHandlerStyle *) self;
RsvgHandle *ctx = z->ctx;
if (z->is_text_css)
rsvg_parse_cssbuffer (ctx, z->style->str, z->style->len);
g_string_free (z->style, TRUE);
g_free (z);
}
static void
rsvg_style_handler_characters (RsvgSaxHandler * self, const char *ch, int len)
{
RsvgSaxHandlerStyle *z = (RsvgSaxHandlerStyle *) self;
g_string_append_len (z->style, ch, len);
}
static void
rsvg_style_handler_start (RsvgSaxHandler * self, const char *name, RsvgPropertyBag * atts)
{
}
static void
rsvg_style_handler_end (RsvgSaxHandler * self, const char *name)
{
RsvgSaxHandlerStyle *z = (RsvgSaxHandlerStyle *) self;
RsvgHandle *ctx = z->ctx;
RsvgSaxHandler *prev = &z->parent->super;
if (!strcmp (name, "style")) {
if (ctx->priv->handler != NULL) {
ctx->priv->handler->free (ctx->priv->handler);
ctx->priv->handler = prev;
}
}
}
static void
rsvg_start_style (RsvgHandle * ctx, RsvgPropertyBag *atts)
{
RsvgSaxHandlerStyle *handler = g_new0 (RsvgSaxHandlerStyle, 1);
const char *type;
type = rsvg_property_bag_lookup (atts, "type");
handler->super.free = rsvg_style_handler_free;
handler->super.characters = rsvg_style_handler_characters;
handler->super.start_element = rsvg_style_handler_start;
handler->super.end_element = rsvg_style_handler_end;
handler->ctx = ctx;
handler->style = g_string_new (NULL);
handler->is_text_css = type && g_ascii_strcasecmp (type, "text/css") == 0;
handler->parent = (RsvgSaxHandlerDefs *) ctx->priv->handler;
ctx->priv->handler = &handler->super;
}
static void
rsvg_standard_element_start (RsvgHandle * ctx, const char *name, RsvgPropertyBag * atts)
{
/*replace this stuff with a hash for fast reading! */
RsvgNode *newnode = NULL;
if (!strcmp (name, "g"))
newnode = rsvg_new_group ();
else if (!strcmp (name, "a")) /*treat anchors as groups for now */
newnode = rsvg_new_group ();
else if (!strcmp (name, "switch"))
newnode = rsvg_new_switch ();
else if (!strcmp (name, "defs"))
newnode = rsvg_new_defs ();
else if (!strcmp (name, "use"))
newnode = rsvg_new_use ();
else if (!strcmp (name, "path"))
newnode = rsvg_new_path ();
else if (!strcmp (name, "line"))
newnode = rsvg_new_line ();
else if (!strcmp (name, "rect"))
newnode = rsvg_new_rect ();
else if (!strcmp (name, "ellipse"))
newnode = rsvg_new_ellipse ();
else if (!strcmp (name, "circle"))
newnode = rsvg_new_circle ();
else if (!strcmp (name, "polygon"))
newnode = rsvg_new_polygon ();
else if (!strcmp (name, "polyline"))
newnode = rsvg_new_polyline ();
else if (!strcmp (name, "symbol"))
newnode = rsvg_new_symbol ();
else if (!strcmp (name, "svg"))
newnode = rsvg_new_svg ();
else if (!strcmp (name, "mask"))
newnode = rsvg_new_mask ();
else if (!strcmp (name, "clipPath"))
newnode = rsvg_new_clip_path ();
else if (!strcmp (name, "image"))
newnode = rsvg_new_image ();
else if (!strcmp (name, "marker"))
newnode = rsvg_new_marker ();
else if (!strcmp (name, "stop"))
newnode = rsvg_new_stop ();
else if (!strcmp (name, "pattern"))
newnode = rsvg_new_pattern ();
else if (!strcmp (name, "linearGradient"))
newnode = rsvg_new_linear_gradient ();
else if (!strcmp (name, "radialGradient"))
newnode = rsvg_new_radial_gradient ();
else if (!strcmp (name, "conicalGradient"))
newnode = rsvg_new_radial_gradient ();
else if (!strcmp (name, "filter"))
newnode = rsvg_new_filter ();
else if (!strcmp (name, "feBlend"))
newnode = rsvg_new_filter_primitive_blend ();
else if (!strcmp (name, "feColorMatrix"))
newnode = rsvg_new_filter_primitive_colour_matrix ();
else if (!strcmp (name, "feComponentTransfer"))
newnode = rsvg_new_filter_primitive_component_transfer ();
else if (!strcmp (name, "feComposite"))
newnode = rsvg_new_filter_primitive_composite ();
else if (!strcmp (name, "feConvolveMatrix"))
newnode = rsvg_new_filter_primitive_convolve_matrix ();
else if (!strcmp (name, "feDiffuseLighting"))
newnode = rsvg_new_filter_primitive_diffuse_lighting ();
else if (!strcmp (name, "feDisplacementMap"))
newnode = rsvg_new_filter_primitive_displacement_map ();
else if (!strcmp (name, "feFlood"))
newnode = rsvg_new_filter_primitive_flood ();
else if (!strcmp (name, "feGaussianBlur"))
newnode = rsvg_new_filter_primitive_gaussian_blur ();
else if (!strcmp (name, "feImage"))
newnode = rsvg_new_filter_primitive_image ();
else if (!strcmp (name, "feMerge"))
newnode = rsvg_new_filter_primitive_merge ();
else if (!strcmp (name, "feMorphology"))
newnode = rsvg_new_filter_primitive_erode ();
else if (!strcmp (name, "feOffset"))
newnode = rsvg_new_filter_primitive_offset ();
else if (!strcmp (name, "feSpecularLighting"))
newnode = rsvg_new_filter_primitive_specular_lighting ();
else if (!strcmp (name, "feTile"))
newnode = rsvg_new_filter_primitive_tile ();
else if (!strcmp (name, "feTurbulence"))
newnode = rsvg_new_filter_primitive_turbulence ();
else if (!strcmp (name, "feMergeNode"))
newnode = rsvg_new_filter_primitive_merge_node ();
else if (!strcmp (name, "feFuncR"))
newnode = rsvg_new_node_component_transfer_function ('r');
else if (!strcmp (name, "feFuncG"))
newnode = rsvg_new_node_component_transfer_function ('g');
else if (!strcmp (name, "feFuncB"))
newnode = rsvg_new_node_component_transfer_function ('b');
else if (!strcmp (name, "feFuncA"))
newnode = rsvg_new_node_component_transfer_function ('a');
else if (!strcmp (name, "feDistantLight"))
newnode = rsvg_new_node_light_source ('d');
else if (!strcmp (name, "feSpotLight"))
newnode = rsvg_new_node_light_source ('s');
else if (!strcmp (name, "fePointLight"))
newnode = rsvg_new_node_light_source ('p');
/* hack to make multiImage sort-of work */
else if (!strcmp (name, "multiImage"))
newnode = rsvg_new_switch ();
else if (!strcmp (name, "subImageRef"))
newnode = rsvg_new_image ();
else if (!strcmp (name, "subImage"))
newnode = rsvg_new_group ();
else if (!strcmp (name, "text"))
newnode = rsvg_new_text ();
else if (!strcmp (name, "tspan"))
newnode = rsvg_new_tspan ();
else if (!strcmp (name, "tref"))
newnode = rsvg_new_tref ();
else {
/* hack for bug 401115. whenever we encounter a node we don't understand, push it into a group.
this will allow us to handle things like conditionals properly. */
newnode = rsvg_new_group ();
}
if (newnode) {
g_assert (RSVG_NODE_TYPE (newnode) != RSVG_NODE_TYPE_INVALID);
newnode->name = (char *) name; /* libxml will keep this while parsing */
newnode->parent = ctx->priv->currentnode;
rsvg_node_set_atts (newnode, ctx, atts);
rsvg_defs_register_memory (ctx->priv->defs, newnode);
if (ctx->priv->currentnode) {
rsvg_node_group_pack (ctx->priv->currentnode, newnode);
ctx->priv->currentnode = newnode;
} else if (RSVG_NODE_TYPE (newnode) == RSVG_NODE_TYPE_SVG) {
ctx->priv->treebase = newnode;
ctx->priv->currentnode = newnode;
}
}
}
/* extra (title, desc, metadata) */
static void
rsvg_extra_handler_free (RsvgSaxHandler * self)
{
RsvgSaxHandlerExtra *z = (RsvgSaxHandlerExtra *) self;
if (z->stringptr) {
if (*z->stringptr)
g_string_free (*z->stringptr, TRUE);
*z->stringptr = z->string;
} else if (z->string) {
g_string_free (z->string, TRUE);
}
g_free (self);
}
static void
rsvg_extra_handler_characters (RsvgSaxHandler * self, const char *ch, int len)
{
RsvgSaxHandlerExtra *z = (RsvgSaxHandlerExtra *) self;
/* This isn't quite the correct behavior - in theory, any graphics
element may contain a title, desc, or metadata element */
if (!z->string)
return;
if (!ch || !len)
return;
if (!g_utf8_validate ((char *) ch, len, NULL)) {
char *utf8;
utf8 = rsvg_make_valid_utf8 ((char *) ch, len);
g_string_append (z->string, utf8);
g_free (utf8);
} else {
g_string_append_len (z->string, (char *) ch, len);
}
}
static void
rsvg_extra_handler_start (RsvgSaxHandler * self, const char *name, RsvgPropertyBag * atts)
{
}
static void
rsvg_extra_handler_end (RsvgSaxHandler * self, const char *name)
{
RsvgSaxHandlerExtra *z = (RsvgSaxHandlerExtra *) self;
RsvgHandle *ctx = z->ctx;
if (!strcmp (name, z->name)) {
if (ctx->priv->handler != NULL) {
ctx->priv->handler->free (ctx->priv->handler);
ctx->priv->handler = NULL;
}
}
}
static RsvgSaxHandlerExtra *
rsvg_start_extra (RsvgHandle * ctx,
const char *name,
GString **stringptr)
{
RsvgSaxHandlerExtra *handler = g_new0 (RsvgSaxHandlerExtra, 1);
RsvgNode *treebase = ctx->priv->treebase;
RsvgNode *currentnode = ctx->priv->currentnode;
gboolean do_care;
/* only parse <extra> for the <svg> node.
* This isn't quite the correct behavior - any graphics
* element may contain a <extra> element.
*/
do_care = treebase != NULL && treebase == currentnode;
handler->super.free = rsvg_extra_handler_free;
handler->super.characters = rsvg_extra_handler_characters;
handler->super.start_element = rsvg_extra_handler_start;
handler->super.end_element = rsvg_extra_handler_end;
handler->ctx = ctx;
handler->name = name; /* interned */
handler->string = do_care ? g_string_new (NULL) : NULL;
handler->stringptr = do_care ? stringptr : NULL;
ctx->priv->handler = &handler->super;
return handler;
}
/* start desc */
static void
rsvg_start_desc (RsvgHandle * ctx)
{
rsvg_start_extra (ctx, "desc", &ctx->priv->desc);
}
/* end desc */
/* start title */
static void
rsvg_start_title (RsvgHandle * ctx)
{
rsvg_start_extra (ctx, "title", &ctx->priv->title);
}
/* end title */
/* start metadata */
static void
rsvg_metadata_props_enumerate (const char *key, const char *value, gpointer user_data)
{
GString *metadata = (GString *) user_data;
g_string_append_printf (metadata, "%s=\"%s\" ", key, value);
}
static void
rsvg_metadata_handler_start (RsvgSaxHandler * self, const char *name, RsvgPropertyBag * atts)
{
RsvgSaxHandlerMetadata *z = (RsvgSaxHandlerMetadata *) self;
rsvg_extra_handler_start (self, name, atts);
if (!z->string)
return;
g_string_append_printf (z->string, "<%s ", name);
rsvg_property_bag_enumerate (atts, rsvg_metadata_props_enumerate, z->string);
g_string_append (z->string, ">\n");
}
static void
rsvg_metadata_handler_end (RsvgSaxHandler * self, const char *name)
{
RsvgSaxHandlerMetadata *z = (RsvgSaxHandlerMetadata *) self;
if (strcmp (name, z->name) != 0) {
if (z->string)
g_string_append_printf (z->string, "</%s>\n", name);
} else {
rsvg_extra_handler_end (self, name);
}
}
static void
rsvg_start_metadata (RsvgHandle * ctx)
{
RsvgSaxHandlerMetadata *handler = rsvg_start_extra (ctx, "metadata", &ctx->priv->metadata);
handler->super.start_element = rsvg_metadata_handler_start;
handler->super.end_element = rsvg_metadata_handler_end;
}
/* end metadata */
/* start xinclude */
typedef struct _RsvgSaxHandlerXinclude {
RsvgSaxHandler super;
RsvgSaxHandler *prev_handler;
RsvgHandle *ctx;
gboolean success;
gboolean in_fallback;
} RsvgSaxHandlerXinclude;
static void
rsvg_start_xinclude (RsvgHandle * ctx, RsvgPropertyBag * atts);
static void
rsvg_characters_impl (RsvgHandle * ctx, const xmlChar * ch, int len);
static void
rsvg_xinclude_handler_free (RsvgSaxHandler * self)
{
g_free (self);
}
static void
rsvg_xinclude_handler_characters (RsvgSaxHandler * self, const char *ch, int len)
{
RsvgSaxHandlerXinclude *z = (RsvgSaxHandlerXinclude *) self;
if (z->in_fallback) {
rsvg_characters_impl (z->ctx, (const xmlChar *) ch, len);
}
}
static void
rsvg_xinclude_handler_start (RsvgSaxHandler * self, const char *name, RsvgPropertyBag * atts)
{
RsvgSaxHandlerXinclude *z = (RsvgSaxHandlerXinclude *) self;
if (!z->success) {
if (z->in_fallback) {
if (!strcmp (name, "xi:include"))
rsvg_start_xinclude (z->ctx, atts);
else
rsvg_standard_element_start (z->ctx, (const char *) name, atts);
} else if (!strcmp (name, "xi:fallback")) {
z->in_fallback = TRUE;
}
}
}
static void
rsvg_xinclude_handler_end (RsvgSaxHandler * self, const char *name)
{
RsvgSaxHandlerXinclude *z = (RsvgSaxHandlerXinclude *) self;
RsvgHandle *ctx = z->ctx;
if (!strcmp (name, "include") || !strcmp (name, "xi:include")) {
if (ctx->priv->handler != NULL) {
RsvgSaxHandler *previous_handler;
previous_handler = z->prev_handler;
ctx->priv->handler->free (ctx->priv->handler);
ctx->priv->handler = previous_handler;
}
} else if (z->in_fallback) {
if (!strcmp (name, "xi:fallback"))
z->in_fallback = FALSE;
}
}
/* http://www.w3.org/TR/xinclude/ */
static void
rsvg_start_xinclude (RsvgHandle * ctx, RsvgPropertyBag * atts)
{
RsvgSaxHandlerXinclude *handler;
const char *href, *parse;
gboolean success = FALSE;
href = rsvg_property_bag_lookup (atts, "href");
if (href == NULL)
goto fallback;
parse = rsvg_property_bag_lookup (atts, "parse");
if (parse && !strcmp (parse, "text")) {
guint8 *data;
gsize data_len;
const char *encoding;
data = _rsvg_handle_acquire_data (ctx, href, NULL, &data_len, NULL);
if (data == NULL)
goto fallback;
encoding = rsvg_property_bag_lookup (atts, "encoding");
if (encoding && g_ascii_strcasecmp (encoding, "UTF-8") != 0) {
char *text_data;
gsize text_data_len;
text_data = g_convert (data, data_len, "utf-8", encoding, NULL,
&text_data_len, NULL);
g_free (data);
data = text_data;
data_len = text_data_len;
}
rsvg_characters_impl (ctx, (const xmlChar *) data, data_len);
g_free (data);
} else {
/* xml */
GInputStream *stream;
GError *err = NULL;
xmlDocPtr xml_doc;
xmlParserCtxtPtr xml_parser;
xmlParserInputBufferPtr buffer;
xmlParserInputPtr input;
stream = _rsvg_handle_acquire_stream (ctx, href, NULL, NULL);
if (stream == NULL)
goto fallback;
xml_parser = xmlCreatePushParserCtxt (&rsvgSAXHandlerStruct, ctx, NULL, 0, NULL);
buffer = _rsvg_xml_input_buffer_new_from_stream (stream, NULL /* cancellable */, XML_CHAR_ENCODING_NONE, &err);
g_object_unref (stream);
input = xmlNewIOInputStream (xml_parser, buffer /* adopts */, XML_CHAR_ENCODING_NONE);
if (xmlPushInput (xml_parser, input) < 0) {
g_clear_error (&err);
xmlFreeInputStream (input);
xmlFreeParserCtxt (xml_parser);
goto fallback;
}
(void) xmlParseDocument (xml_parser);
xml_doc = xml_parser->myDoc;
xmlFreeParserCtxt (xml_parser);
if (xml_doc)
xmlFreeDoc (xml_doc);
g_clear_error (&err);
}
success = TRUE;
fallback:
/* needed to handle xi:fallback */
handler = g_new0 (RsvgSaxHandlerXinclude, 1);
handler->super.free = rsvg_xinclude_handler_free;
handler->super.characters = rsvg_xinclude_handler_characters;
handler->super.start_element = rsvg_xinclude_handler_start;
handler->super.end_element = rsvg_xinclude_handler_end;
handler->prev_handler = ctx->priv->handler;
handler->ctx = ctx;
handler->success = success;
ctx->priv->handler = &handler->super;
}
/* end xinclude */
static void
rsvg_start_element (void *data, const xmlChar * name, const xmlChar ** atts)
{
RsvgPropertyBag *bag;
RsvgHandle *ctx = (RsvgHandle *) data;
bag = rsvg_property_bag_new ((const char **) atts);
if (ctx->priv->handler) {
ctx->priv->handler_nest++;
if (ctx->priv->handler->start_element != NULL)
ctx->priv->handler->start_element (ctx->priv->handler, (const char *) name, bag);
} else {
const char *tempname;
for (tempname = (const char *) name; *tempname != '\0'; tempname++)
if (*tempname == ':')
name = (const xmlChar *) (tempname + 1);
if (!strcmp ((const char *) name, "style"))
rsvg_start_style (ctx, bag);
else if (!strcmp ((const char *) name, "title"))
rsvg_start_title (ctx);
else if (!strcmp ((const char *) name, "desc"))
rsvg_start_desc (ctx);
else if (!strcmp ((const char *) name, "metadata"))
rsvg_start_metadata (ctx);
else if (!strcmp ((const char *) name, "include")) /* xi:include */
rsvg_start_xinclude (ctx, bag);
else
rsvg_standard_element_start (ctx, (const char *) name, bag);
}
rsvg_property_bag_free (bag);
}
static void
rsvg_end_element (void *data, const xmlChar * name)
{
RsvgHandle *ctx = (RsvgHandle *) data;
if (ctx->priv->handler_nest > 0 && ctx->priv->handler != NULL) {
if (ctx->priv->handler->end_element != NULL)
ctx->priv->handler->end_element (ctx->priv->handler, (const char *) name);
ctx->priv->handler_nest--;
} else {
const char *tempname;
for (tempname = (const char *) name; *tempname != '\0'; tempname++)
if (*tempname == ':')
name = (const xmlChar *) (tempname + 1);
if (ctx->priv->handler != NULL) {
ctx->priv->handler->free (ctx->priv->handler);
ctx->priv->handler = NULL;
}
if (ctx->priv->currentnode &&
!strcmp ((const char *) name, ctx->priv->currentnode->name))
rsvg_pop_def_group (ctx);
/* FIXMEchpe: shouldn't this check that currentnode == treebase or sth like that? */
if (ctx->priv->treebase && !strcmp ((const char *)name, "svg"))
_rsvg_node_svg_apply_atts ((RsvgNodeSvg *)ctx->priv->treebase, ctx);
}
}
static void
_rsvg_node_chars_free (RsvgNode * node)
{
RsvgNodeChars *self = (RsvgNodeChars *) node;
g_string_free (self->contents, TRUE);
_rsvg_node_free (node);
}
static RsvgNodeChars *
rsvg_new_node_chars (const char *text,
int len)
{
RsvgNodeChars *self;
self = g_new (RsvgNodeChars, 1);
_rsvg_node_init (&self->super, RSVG_NODE_TYPE_CHARS);
if (!g_utf8_validate (text, len, NULL)) {
char *utf8;
utf8 = rsvg_make_valid_utf8 (text, len);
self->contents = g_string_new (utf8);
g_free (utf8);
} else {
self->contents = g_string_new_len (text, len);
}
self->super.free = _rsvg_node_chars_free;
self->super.state->cond_true = FALSE;
return self;
}
static void
rsvg_characters_impl (RsvgHandle * ctx, const xmlChar * ch, int len)
{
RsvgNodeChars *self;
if (!ch || !len)
return;
if (ctx->priv->currentnode) {
RsvgNodeType type = RSVG_NODE_TYPE (ctx->priv->currentnode);
if (type == RSVG_NODE_TYPE_TSPAN ||
type == RSVG_NODE_TYPE_TEXT) {
guint i;
/* find the last CHARS node in the text or tspan node, so that we
can coalesce the text, and thus avoid screwing up the Pango layouts */
self = NULL;
for (i = 0; i < ctx->priv->currentnode->children->len; i++) {
RsvgNode *node = g_ptr_array_index (ctx->priv->currentnode->children, i);
if (RSVG_NODE_TYPE (node) == RSVG_NODE_TYPE_CHARS) {
self = (RsvgNodeChars*)node;
}
else if (RSVG_NODE_TYPE (node) == RSVG_NODE_TYPE_TSPAN) {
self = NULL;
}
}
if (self != NULL) {
if (!g_utf8_validate ((char *) ch, len, NULL)) {
char *utf8;
utf8 = rsvg_make_valid_utf8 ((char *) ch, len);
g_string_append (self->contents, utf8);
g_free (utf8);
} else {
g_string_append_len (self->contents, (char *)ch, len);
}
return;
}
}
}
self = rsvg_new_node_chars ((char *) ch, len);
rsvg_defs_register_memory (ctx->priv->defs, (RsvgNode *) self);
if (ctx->priv->currentnode)
rsvg_node_group_pack (ctx->priv->currentnode, (RsvgNode *) self);
}
static void
rsvg_characters (void *data, const xmlChar * ch, int len)
{
RsvgHandle *ctx = (RsvgHandle *) data;
if (ctx->priv->handler && ctx->priv->handler->characters != NULL) {
ctx->priv->handler->characters (ctx->priv->handler, (const char *) ch, len);
return;
}
rsvg_characters_impl (ctx, ch, len);
}
static xmlEntityPtr
rsvg_get_entity (void *data, const xmlChar * name)
{
RsvgHandle *ctx = (RsvgHandle *) data;
xmlEntityPtr entity;
entity = g_hash_table_lookup (ctx->priv->entities, name);
return entity;
}
static void
rsvg_entity_decl (void *data, const xmlChar * name, int type,
const xmlChar * publicId, const xmlChar * systemId, xmlChar * content)
{
RsvgHandle *ctx = (RsvgHandle *) data;
GHashTable *entities = ctx->priv->entities;
xmlEntityPtr entity;
xmlChar *resolvedSystemId = NULL, *resolvedPublicId = NULL;
if (systemId)
resolvedSystemId = xmlBuildRelativeURI (systemId, (xmlChar*) rsvg_handle_get_base_uri (ctx));
else if (publicId)
resolvedPublicId = xmlBuildRelativeURI (publicId, (xmlChar*) rsvg_handle_get_base_uri (ctx));
if (type == XML_EXTERNAL_PARAMETER_ENTITY && !content) {
guint8 *entity_data;
gsize entity_data_len;
if (systemId)
entity_data = _rsvg_handle_acquire_data (ctx,
(const char *) systemId,
NULL,
&entity_data_len,
NULL);
else if (publicId)
entity_data = _rsvg_handle_acquire_data (ctx,
(const char *) publicId,
NULL,
&entity_data_len,
NULL);
else
entity_data = NULL;
if (entity_data) {
content = xmlCharStrndup (entity_data, entity_data_len);
g_free (entity_data);
}
}
entity = xmlNewEntity(NULL, name, type, resolvedPublicId, resolvedSystemId, content);
xmlFree(resolvedPublicId);
xmlFree(resolvedSystemId);
g_hash_table_insert (entities, g_strdup ((const char*) name), entity);
}
static void
rsvg_unparsed_entity_decl (void *ctx,
const xmlChar * name,
const xmlChar * publicId,
const xmlChar * systemId, const xmlChar * notationName)
{
rsvg_entity_decl (ctx, name, XML_INTERNAL_GENERAL_ENTITY, publicId, systemId, NULL);
}
static xmlEntityPtr
rsvg_get_parameter_entity (void *data, const xmlChar * name)
{
RsvgHandle *ctx = (RsvgHandle *) data;
xmlEntityPtr entity;
entity = g_hash_table_lookup (ctx->priv->entities, name);
return entity;
}
static void
rsvg_error_cb (void *data, const char *msg, ...)
{
#ifdef G_ENABLE_DEBUG
va_list args;
va_start (args, msg);
vfprintf (stderr, msg, args);
va_end (args);
#endif
}
static void
rsvg_processing_instruction (void *ctx, const xmlChar * target, const xmlChar * data)
{
/* http://www.w3.org/TR/xml-stylesheet/ */
RsvgHandle *handle = (RsvgHandle *) ctx;
if (!strcmp ((const char *) target, "xml-stylesheet")) {
RsvgPropertyBag *atts;
char **xml_atts;
xml_atts = rsvg_css_parse_xml_attribute_string ((const char *) data);
if (xml_atts) {
const char *value;
atts = rsvg_property_bag_new ((const char **) xml_atts);
value = rsvg_property_bag_lookup (atts, "alternate");
if (!value || !value[0] || (strcmp (value, "no") != 0)) {
value = rsvg_property_bag_lookup (atts, "type");
if (value && strcmp (value, "text/css") == 0) {
value = rsvg_property_bag_lookup (atts, "href");
if (value && value[0]) {
guint8 *style_data;
gsize style_data_len;
char *mime_type = NULL;
style_data = _rsvg_handle_acquire_data (handle,
value,
&mime_type,
&style_data_len,
NULL);
if (style_data &&
mime_type &&
strcmp (mime_type, "text/css") == 0) {
rsvg_parse_cssbuffer (handle, (char *) style_data, style_data_len);
}
g_free (mime_type);
g_free (style_data);
}
}
}
rsvg_property_bag_free (atts);
g_strfreev (xml_atts);
}
}
}
void
rsvg_SAX_handler_struct_init (void)
{
if (!rsvgSAXHandlerStructInited) {
rsvgSAXHandlerStructInited = TRUE;
memset (&rsvgSAXHandlerStruct, 0, sizeof (rsvgSAXHandlerStruct));
rsvgSAXHandlerStruct.getEntity = rsvg_get_entity;
rsvgSAXHandlerStruct.entityDecl = rsvg_entity_decl;
rsvgSAXHandlerStruct.unparsedEntityDecl = rsvg_unparsed_entity_decl;
rsvgSAXHandlerStruct.getParameterEntity = rsvg_get_parameter_entity;
rsvgSAXHandlerStruct.characters = rsvg_characters;
rsvgSAXHandlerStruct.error = rsvg_error_cb;
rsvgSAXHandlerStruct.cdataBlock = rsvg_characters;
rsvgSAXHandlerStruct.startElement = rsvg_start_element;
rsvgSAXHandlerStruct.endElement = rsvg_end_element;
rsvgSAXHandlerStruct.processingInstruction = rsvg_processing_instruction;
}
}
/* http://www.ietf.org/rfc/rfc2396.txt */
static gboolean
rsvg_path_is_uri (char const *path)
{
char const *p;
if (path == NULL)
return FALSE;
if (strlen (path) < 4)
return FALSE;
if ((path[0] < 'a' || path[0] > 'z') &&
(path[0] < 'A' || path[0] > 'Z')) {
return FALSE;
}
for (p = &path[1];
(*p >= 'a' && *p <= 'z') ||
(*p >= 'A' && *p <= 'Z') ||
(*p >= '0' && *p <= '9') ||
*p == '+' ||
*p == '-' ||
*p == '.';
p++);
if (strlen (p) < 3)
return FALSE;
return (p[0] == ':' && p[1] == '/' && p[2] == '/');
}
gchar *
rsvg_get_base_uri_from_filename (const gchar * filename)
{
gchar *current_dir;
gchar *absolute_filename;
gchar *base_uri;
if (g_path_is_absolute (filename))
return g_filename_to_uri (filename, NULL, NULL);
current_dir = g_get_current_dir ();
absolute_filename = g_build_filename (current_dir, filename, NULL);
base_uri = g_filename_to_uri (absolute_filename, NULL, NULL);
g_free (absolute_filename);
g_free (current_dir);
return base_uri;
}
/**
* rsvg_handle_set_base_uri
* @handle: A #RsvgHandle
* @base_uri: The base uri
*
* Set the base URI for this SVG. This can only be called before rsvg_handle_write()
* has been called.
*
* Since: 2.9
*/
void