#define degToRad(angleInDegrees) ((angleInDegrees) * M_PI / 180.0)
#define radToDeg(angleInRadians) ((angleInRadians) * 180.0 / M_PI)
+static svgtiny_code svgtiny_parse_style_element(dom_element *style,
+ struct svgtiny_parse_state state);
+static css_stylesheet *svgtiny_parse_style_inline(const uint8_t *data,
+ size_t len);
static svgtiny_code svgtiny_preparse_styles(dom_element *svg,
struct svgtiny_parse_state state);
static svgtiny_code svgtiny_parse_svg(dom_element *svg,
lwc_string_unref(svg_name_lwc);
dom_string_unref(svg_name);
- /* get graphic dimensions */
+ /* initialize the state struct with zeros */
memset(&state, 0, sizeof(state));
+
+ /* get graphic dimensions */
state.diagram = diagram;
state.document = document;
state.viewport_width = viewport_width;
state.viewport_height = viewport_height;
-
/* Initialize CSS context */
- if (state.select_ctx == NULL) {
- css_code = css_select_ctx_create(&state.select_ctx);
- if (css_code != CSS_OK) {
- dom_node_unref(svg);
- dom_node_unref(document);
- return svgtiny_LIBCSS_ERROR;
- }
+ css_code = css_select_ctx_create(&state.select_ctx);
+ if (css_code != CSS_OK) {
+ dom_node_unref(svg);
+ dom_node_unref(document);
+ return svgtiny_LIBCSS_ERROR;
}
#define SVGTINY_STRING_ACTION2(s,n) \
#include "svgtiny_strings.h"
#undef SVGTINY_STRING_ACTION2
+ /* Intern SVG's xmlns separately because it's an lwc_string
+ * and not a dom_string. We initialize its pointer to NULL
+ * because the "cleanup:" test to see if it needs to be free'd
+ * looks for NULL. Returning a LIBDOM_ERROR on failure is not
+ * perfect but it's the closest of the available options. */
+ state.interned_svg_xmlns = NULL;
+ if (lwc_intern_string("http://www.w3.org/2000/svg",
+ 26,
+ &state.interned_svg_xmlns) != lwc_error_ok) {
+ code = svgtiny_LIBDOM_ERROR;
+ goto cleanup;
+ }
+
svgtiny_parse_position_attributes(svg, state, &x, &y, &width, &height);
diagram->width = width;
diagram->height = height;
dom_string_unref(state.interned_##s);
#include "svgtiny_strings.h"
#undef SVGTINY_STRING_ACTION2
+
+ if (state.interned_svg_xmlns != NULL) {
+ lwc_string_unref(state.interned_svg_xmlns);
+ }
+
return code;
}
+
+/**
+ * Parse a single <style> element, appending the result to the CSS
+ * select context within the given parser state.
+ */
+svgtiny_code svgtiny_parse_style_element(dom_element *style,
+ struct svgtiny_parse_state state)
+{
+ css_stylesheet *sheet;
+ css_error code;
+ dom_exception exc;
+
+ code = svgtiny_create_stylesheet(&sheet, false);
+ if (code != CSS_OK) {
+ return svgtiny_LIBCSS_ERROR;
+ }
+
+ /* Parse the style element's "media" attribute if it has
+ one. We don't do anything with it right now. */
+ dom_string *media_attr;
+ exc = dom_element_get_attribute(style, state.interned_media,
+ &media_attr);
+ if (exc != DOM_NO_ERR) {
+ css_stylesheet_destroy(sheet);
+ return svgtiny_LIBDOM_ERROR;
+ }
+
+ if (media_attr) {
+ /* Here's where we'd actually change the media type if
+ we were going to use it */
+ dom_string_unref(media_attr);
+ }
+
+ dom_string *data;
+ dom_node_get_text_content(style, &data);
+ if (data == NULL) {
+ /* Empty stylesheet? That's fine. */
+ css_stylesheet_destroy(sheet);
+ return svgtiny_OK;
+ }
+
+ code = css_stylesheet_append_data(sheet,
+ (uint8_t *)dom_string_data(data),
+ dom_string_byte_length(data));
+ if (code != CSS_OK && code != CSS_NEEDDATA) {
+ dom_string_unref(data);
+ css_stylesheet_destroy(sheet);
+ return svgtiny_LIBCSS_ERROR;
+ }
+
+ code = css_stylesheet_data_done(sheet);
+ if (code != CSS_OK) {
+ dom_string_unref(data);
+ css_stylesheet_destroy(sheet);
+ return svgtiny_LIBCSS_ERROR;
+ }
+
+ code = css_select_ctx_append_sheet(state.select_ctx,
+ sheet,
+ CSS_ORIGIN_AUTHOR,
+ NULL);
+ if (code != CSS_OK) {
+ dom_string_unref(data);
+ return svgtiny_LIBCSS_ERROR;
+ }
+
+ dom_string_unref(data);
+ return svgtiny_OK;
+}
+
+
+/**
+ * Parse the contents of an inline style and return (a pointer to) the
+ * corresponding stylesheet for use with css_select_style(). Returns
+ * NULL if anything goes wrong.
+ */
+css_stylesheet *svgtiny_parse_style_inline(const uint8_t *data,
+ size_t len)
+{
+ css_stylesheet *sheet;
+ css_error code;
+
+ code = svgtiny_create_stylesheet(&sheet, true);
+ if (code != CSS_OK) {
+ return NULL;
+ }
+
+ code = css_stylesheet_append_data(sheet, data, len);
+ if (code != CSS_OK && code != CSS_NEEDDATA) {
+ css_stylesheet_destroy(sheet);
+ return NULL;
+ }
+
+ code = css_stylesheet_data_done(sheet);
+ if (code != CSS_OK) {
+ css_stylesheet_destroy(sheet);
+ return NULL;
+ }
+
+ return sheet;
+}
+
/**
* Parse all <style> elements within a root <svg> element. This
* should be called before svgtiny_parse_svg() because that function
if (dom_string_caseless_isequal(state.interned_style,
nodename)) {
/* We have a <style> element, parse it */
+ code = svgtiny_parse_style_element(child,
+ state);
}
{
dom_string *attr;
dom_exception exc;
+ css_error code;
+ uint8_t fill_opacity_type;
+ css_fixed fill_opacity;
+ uint8_t stroke_opacity_type;
+ css_fixed stroke_opacity;
+
+ /* We store the result of svgtiny_parse_style_inline() in
+ * inline_sheet, and that function returns NULL on error; in
+ * particular you do not need to css_stylesheet_destroy() the
+ * result if it is NULL, and css_stylesheet_destroy() checks
+ * for that case. */
+ css_stylesheet *inline_sheet = NULL;
+
+ /* Initialize this to NULL for the same reason: so that we can
+ * safely destroy it later even if we never populated it. */
+ css_select_results *styles = NULL;
exc = dom_element_get_attribute(node, state->interned_fill, &attr);
if (exc == DOM_NO_ERR && attr != NULL) {
exc = dom_element_get_attribute(node, state->interned_style, &attr);
if (exc == DOM_NO_ERR && attr != NULL) {
+ /* First parse the style attribute into a libcss stylesheet
+ in case any of its properties are known to libcss. */
+ inline_sheet = svgtiny_parse_style_inline(
+ (uint8_t *)dom_string_data(attr),
+ dom_string_byte_length(attr));
+
+ /* Parse any other properties "by hand" until they can
+ be supported in libcss. */
char *style = strndup(dom_string_data(attr),
dom_string_byte_length(attr));
const char *s;
free(style);
dom_string_unref(attr);
}
+
+ struct dom_element *parent;
+ dom_element_parent_node(node, &parent);
+ if (parent == NULL) {
+ /* This is the root <svg> node, skip it.
+ *
+ * While initialising its selection state, libcss sets its
+ * node_data->bloom pointer using css__get_parent_bloom().
+ * But if there is no parent, that function returns,
+ *
+ * static css_bloom empty_bloom[CSS_BLOOM_SIZE];
+ *
+ * A problem later arises because when libcss FINALISES its
+ * selection state, it frees node_data->bloom! That obviously
+ * won't work then node has no parent, i.e. if it's the root
+ * <svg> element.
+ */
+ css_stylesheet_destroy(inline_sheet);
+ return;
+ }
+ else {
+ /* We only needed to know if it was NULL */
+ dom_node_unref(parent);
+ }
+
+ code = svgtiny_select_style(state, node, inline_sheet, &styles);
+ css_stylesheet_destroy(inline_sheet);
+ if (code != CSS_OK) {
+ return;
+ }
+
+ fill_opacity_type = css_computed_fill_opacity(
+ styles->styles[CSS_PSEUDO_ELEMENT_NONE],
+ &fill_opacity);
+ stroke_opacity_type = css_computed_stroke_opacity(
+ styles->styles[CSS_PSEUDO_ELEMENT_NONE],
+ &stroke_opacity);
+ css_select_results_destroy(styles);
+
+ if (fill_opacity_type == CSS_FILL_OPACITY_SET) {
+ state->fill_opacity = FIXTOFLT(fill_opacity);
+ }
+ if (stroke_opacity_type == CSS_STROKE_OPACITY_SET) {
+ state->stroke_opacity = FIXTOFLT(stroke_opacity);
+ }
}
shape->text = 0;
shape->fill = state->fill;
shape->stroke = state->stroke;
+ shape->fill_opacity = state->fill_opacity;
+ shape->stroke_opacity = state->stroke_opacity;
shape->stroke_width = lroundf((float) state->stroke_width *
(state->ctm.a + state->ctm.d) / 2.0);
if (0 < state->stroke_width && shape->stroke_width == 0)
projects / libsvgtiny.git / blobdiff