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,
struct svgtiny_parse_state *state);
static void svgtiny_parse_transform_attributes(dom_element *node,
struct svgtiny_parse_state *state);
+static void svgtiny_parse_styles(dom_element *node,
+ struct svgtiny_parse_state *state);
static svgtiny_code svgtiny_add_path(float *p, unsigned int n,
struct svgtiny_parse_state *state);
static void _svgtiny_parse_color(const char *s, svgtiny_colour *c,
dom_element *svg;
dom_string *svg_name;
lwc_string *svg_name_lwc;
- struct svgtiny_parse_state state;
+ struct svgtiny_parse_state state = {
+ /* Initialize the unit context here because it has a
+ * const member and doing it any other way subverts
+ * the type system. The magic numbers below were taken
+ * from the libcss example program without much
+ * thought, because at the moment we don't support any
+ * properties with units. */
+ .unit_ctx = {
+ .font_size_default = FLTTOFIX(16.0),
+ .font_size_minimum = FLTTOFIX(6.0),
+ .device_dpi = FLTTOFIX(96.0),
+ .root_style = NULL,
+ .pw = NULL,
+ .measure = NULL,
+ }
+ };
float x, y, width, height;
svgtiny_code code;
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;
}
+ /* ...and the unit context, whose other fields were
+ * initialized along with the parser state itself */
+ state.unit_ctx.viewport_width = FLTTOFIX(viewport_width);
+ state.unit_ctx.viewport_height = FLTTOFIX(viewport_height);
+
#define SVGTINY_STRING_ACTION2(s,n) \
if (dom_string_create_interned((const uint8_t *) #n, \
strlen(#n), &state.interned_##s) \
#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 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
}
/**
- * Parse a <svg> or <g> element node.
+ * Parse <svg>, <g>, and <a> element nodes.
*/
svgtiny_code svgtiny_parse_svg(dom_element *svg,
svgtiny_parse_position_attributes(svg, state, &x, &y, &width, &height);
svgtiny_parse_paint_attributes(svg, &state);
svgtiny_parse_font_attributes(svg, &state);
+ svgtiny_parse_styles(svg, &state);
exc = dom_element_get_attribute(svg, state.interned_viewBox,
&view_box);
svgtiny_parse_paint_attributes(path, &state);
svgtiny_parse_transform_attributes(path, &state);
+ svgtiny_parse_styles(path, &state);
/* read d attribute */
exc = dom_element_get_attribute(path, state.interned_d, &path_d_str);
&x, &y, &width, &height);
svgtiny_parse_paint_attributes(rect, &state);
svgtiny_parse_transform_attributes(rect, &state);
+ svgtiny_parse_styles(rect, &state);
p = malloc(13 * sizeof p[0]);
if (!p) {
svgtiny_parse_paint_attributes(circle, &state);
svgtiny_parse_transform_attributes(circle, &state);
+ svgtiny_parse_styles(circle, &state);
if (r < 0) {
state.diagram->error_line = -1; /* circle->line; */
svgtiny_parse_paint_attributes(ellipse, &state);
svgtiny_parse_transform_attributes(ellipse, &state);
+ svgtiny_parse_styles(ellipse, &state);
if (rx < 0 || ry < 0) {
state.diagram->error_line = -1; /* ellipse->line; */
svgtiny_parse_paint_attributes(line, &state);
svgtiny_parse_transform_attributes(line, &state);
+ svgtiny_parse_styles(line, &state);
p = malloc(7 * sizeof p[0]);
if (!p) {
svgtiny_parse_paint_attributes(poly, &state);
svgtiny_parse_transform_attributes(poly, &state);
+ svgtiny_parse_styles(poly, &state);
exc = dom_element_get_attribute(poly, state.interned_points,
&points_str);
exc = dom_element_get_attribute(node, state->interned_style, &attr);
if (exc == DOM_NO_ERR && attr != NULL) {
+ /* Parse a few 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;
}
}
+/**
+ * Parse element styles.
+ *
+ * First we parse any inline "style" attributes. We then compose the
+ * element's style with any parent styles. Finally, we compute any
+ * styles that we support and set the corresponding fields in the
+ * parser state.
+ */
+void svgtiny_parse_styles(dom_element *node,
+ struct svgtiny_parse_state *state)
+{
+ 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;
+
+
+ dom_exception exc;
+ dom_string *attr;
+
+ exc = dom_element_get_attribute(node, state->interned_style, &attr);
+ if (exc != DOM_NO_ERR) {
+ return NULL;
+ }
+ if (attr != NULL) {
+ inline_sheet = svgtiny_parse_style_inline(
+ (uint8_t *)dom_string_data(attr),
+ dom_string_byte_length(attr));
+ 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 NULL;
+ }
+ 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 NULL;
+ }
+
+ 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);
+ }
+}
/**
* Parse a transform string.
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