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-rw-r--r--content/handlers/image/svg.c353
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diff --git a/content/handlers/image/svg.c b/content/handlers/image/svg.c
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+++ b/content/handlers/image/svg.c
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+/*
+ * Copyright 2007-2008 James Bursa <bursa@users.sourceforge.net>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ * Content for image/svg (implementation).
+ */
+
+#include <assert.h>
+#include <limits.h>
+#include <string.h>
+
+#include <svgtiny.h>
+
+#include "utils/messages.h"
+#include "utils/utils.h"
+#include "content/content_protected.h"
+#include "css/css.h"
+#include "desktop/plotters.h"
+
+#include "svg.h"
+
+typedef struct svg_content {
+ struct content base;
+
+ struct svgtiny_diagram *diagram;
+
+ int current_width;
+ int current_height;
+} svg_content;
+
+
+
+static nserror svg_create_svg_data(svg_content *c)
+{
+ union content_msg_data msg_data;
+
+ c->diagram = svgtiny_create();
+ if (c->diagram == NULL)
+ goto no_memory;
+
+ c->current_width = INT_MAX;
+ c->current_height = INT_MAX;
+
+ return NSERROR_OK;
+
+no_memory:
+ msg_data.error = messages_get("NoMemory");
+ content_broadcast(&c->base, CONTENT_MSG_ERROR, msg_data);
+ return NSERROR_NOMEM;
+}
+
+
+/**
+ * Create a CONTENT_SVG.
+ */
+
+static nserror svg_create(const content_handler *handler,
+ lwc_string *imime_type, const struct http_parameter *params,
+ llcache_handle *llcache, const char *fallback_charset,
+ bool quirks, struct content **c)
+{
+ svg_content *svg;
+ nserror error;
+
+ svg = calloc(1, sizeof(svg_content));
+ if (svg == NULL)
+ return NSERROR_NOMEM;
+
+ error = content__init(&svg->base, handler, imime_type, params,
+ llcache, fallback_charset, quirks);
+ if (error != NSERROR_OK) {
+ free(svg);
+ return error;
+ }
+
+ error = svg_create_svg_data(svg);
+ if (error != NSERROR_OK) {
+ free(svg);
+ return error;
+ }
+
+ *c = (struct content *) svg;
+
+ return NSERROR_OK;
+}
+
+
+
+/**
+ * Convert a CONTENT_SVG for display.
+ */
+
+static bool svg_convert(struct content *c)
+{
+ /*c->title = malloc(100);
+ if (c->title)
+ snprintf(c->title, 100, messages_get("svgTitle"),
+ width, height, c->source_size);*/
+ //c->size += ?;
+ content_set_ready(c);
+ content_set_done(c);
+ /* Done: update status bar */
+ content_set_status(c, "");
+
+ return true;
+}
+
+/**
+ * Reformat a CONTENT_SVG.
+ */
+
+static void svg_reformat(struct content *c, int width, int height)
+{
+ svg_content *svg = (svg_content *) c;
+ const char *source_data;
+ unsigned long source_size;
+
+ assert(svg->diagram);
+
+ /* Avoid reformats to same width/height as we already reformatted to */
+ if (width != svg->current_width || height != svg->current_height) {
+ source_data = content__get_source_data(c, &source_size);
+
+ svgtiny_parse(svg->diagram, source_data, source_size,
+ nsurl_access(content_get_url(c)),
+ width, height);
+
+ svg->current_width = width;
+ svg->current_height = height;
+ }
+
+ c->width = svg->diagram->width;
+ c->height = svg->diagram->height;
+}
+
+
+/**
+ * Redraw a CONTENT_SVG.
+ */
+
+static bool svg_redraw_internal(struct content *c, int x, int y,
+ int width, int height, const struct rect *clip,
+ const struct redraw_context *ctx, float scale,
+ colour background_colour)
+{
+ svg_content *svg = (svg_content *) c;
+ float transform[6];
+ struct svgtiny_diagram *diagram = svg->diagram;
+ bool ok;
+ int px, py;
+ unsigned int i;
+ plot_font_style_t fstyle = *plot_style_font;
+
+ assert(diagram);
+
+ transform[0] = (float) width / (float) c->width;
+ transform[1] = 0;
+ transform[2] = 0;
+ transform[3] = (float) height / (float) c->height;
+ transform[4] = x;
+ transform[5] = y;
+
+#define BGR(c) ((c) == svgtiny_TRANSPARENT ? NS_TRANSPARENT : \
+ ((svgtiny_RED((c))) | \
+ (svgtiny_GREEN((c)) << 8) | \
+ (svgtiny_BLUE((c)) << 16)))
+
+ for (i = 0; i != diagram->shape_count; i++) {
+ if (diagram->shape[i].path) {
+ ok = ctx->plot->path(diagram->shape[i].path,
+ diagram->shape[i].path_length,
+ BGR(diagram->shape[i].fill),
+ diagram->shape[i].stroke_width,
+ BGR(diagram->shape[i].stroke),
+ transform);
+ if (!ok)
+ return false;
+
+ } else if (diagram->shape[i].text) {
+ px = transform[0] * diagram->shape[i].text_x +
+ transform[2] * diagram->shape[i].text_y +
+ transform[4];
+ py = transform[1] * diagram->shape[i].text_x +
+ transform[3] * diagram->shape[i].text_y +
+ transform[5];
+
+ fstyle.background = 0xffffff;
+ fstyle.foreground = 0x000000;
+ fstyle.size = (8 * FONT_SIZE_SCALE) * scale;
+
+ ok = ctx->plot->text(px, py,
+ diagram->shape[i].text,
+ strlen(diagram->shape[i].text),
+ &fstyle);
+ if (!ok)
+ return false;
+ }
+ }
+
+#undef BGR
+
+ return true;
+}
+
+
+/**
+ * Redraw a CONTENT_SVG.
+ */
+
+static bool svg_redraw(struct content *c, struct content_redraw_data *data,
+ const struct rect *clip, const struct redraw_context *ctx)
+{
+ int x = data->x;
+ int y = data->y;
+
+ if ((data->width <= 0) && (data->height <= 0)) {
+ /* No point trying to plot SVG if it does not occupy a valid
+ * area */
+ return true;
+ }
+
+ if ((data->repeat_x == false) && (data->repeat_y == false)) {
+ /* Simple case: SVG is not tiled */
+ return svg_redraw_internal(c, x, y,
+ data->width, data->height,
+ clip, ctx, data->scale,
+ data->background_colour);
+ } else {
+ /* Tiled redraw required. SVG repeats to extents of clip
+ * rectangle, in x, y or both directions */
+ int x0, y0, x1, y1;
+
+ /* Find the redraw boundaries to loop within */
+ x0 = x;
+ if (data->repeat_x) {
+ for (; x0 > clip->x0; x0 -= data->width);
+ x1 = clip->x1;
+ } else {
+ x1 = x + 1;
+ }
+ y0 = y;
+ if (data->repeat_y) {
+ for (; y0 > clip->y0; y0 -= data->height);
+ y1 = clip->y1;
+ } else {
+ y1 = y + 1;
+ }
+
+ /* Repeatedly plot the SVG across the area */
+ for (y = y0; y < y1; y += data->height) {
+ for (x = x0; x < x1; x += data->width) {
+ if (!svg_redraw_internal(c, x, y,
+ data->width, data->height,
+ clip, ctx, data->scale,
+ data->background_colour)) {
+ return false;
+ }
+ }
+ }
+ }
+
+ return true;
+}
+
+
+/**
+ * Destroy a CONTENT_SVG and free all resources it owns.
+ */
+
+static void svg_destroy(struct content *c)
+{
+ svg_content *svg = (svg_content *) c;
+
+ if (svg->diagram != NULL)
+ svgtiny_free(svg->diagram);
+}
+
+
+static nserror svg_clone(const struct content *old, struct content **newc)
+{
+ svg_content *svg;
+ nserror error;
+
+ svg = calloc(1, sizeof(svg_content));
+ if (svg == NULL)
+ return NSERROR_NOMEM;
+
+ error = content__clone(old, &svg->base);
+ if (error != NSERROR_OK) {
+ content_destroy(&svg->base);
+ return error;
+ }
+
+ /* Simply replay create/convert */
+ error = svg_create_svg_data(svg);
+ if (error != NSERROR_OK) {
+ content_destroy(&svg->base);
+ return error;
+ }
+
+ if (old->status == CONTENT_STATUS_READY ||
+ old->status == CONTENT_STATUS_DONE) {
+ if (svg_convert(&svg->base) == false) {
+ content_destroy(&svg->base);
+ return NSERROR_CLONE_FAILED;
+ }
+ }
+
+ *newc = (struct content *) svg;
+
+ return NSERROR_OK;
+}
+
+static content_type svg_content_type(void)
+{
+ return CONTENT_IMAGE;
+}
+
+static const content_handler svg_content_handler = {
+ .create = svg_create,
+ .data_complete = svg_convert,
+ .reformat = svg_reformat,
+ .destroy = svg_destroy,
+ .redraw = svg_redraw,
+ .clone = svg_clone,
+ .type = svg_content_type,
+ .no_share = true
+};
+
+static const char *svg_types[] = {
+ "image/svg",
+ "image/svg+xml"
+};
+
+
+CONTENT_FACTORY_REGISTER_TYPES(svg, svg_types, svg_content_handler);
+
+