src/svgtiny_css.c

   1 #include <libcss/libcss.h>
   2
   3 #include "svgtiny.h"
   4 #include "svgtiny_internal.h"
   5
   6 static css_error node_name(void *pw, void *node, css_qname *qname);
   7
   8
   9 /**
  10  * Resolve a relative URL to an absolute one by doing nothing. This is
  11  * the simplest possible implementation of a URL resolver, needed for
  12  * parsing CSS.
  13  */
  14 css_error svgtiny_resolve_url(void *pw,
  15                 const char *base, lwc_string *rel, lwc_string **abs)
  16 {
  17         UNUSED(pw);
  18         UNUSED(base);
  19
  20         /* Copy the relative URL to the absolute one (the return
  21            value) */
  22         *abs = lwc_string_ref(rel);
  23         return CSS_OK;
  24 }
  25
  26 /**
  27  * Create a stylesheet with the default set of params.
  28  *
  29  * \param sheet A stylesheet pointer, passed in by reference, that
  30  * we use to store the newly-created stylesheet.
  31  * \param inline_style True if this stylesheet represents an inline
  32  * style, and false otherwise.
  33  *
  34  * \return The return value from css_stylesheet_create() is returned.
  35  */
  36 css_error svgtiny_create_stylesheet(css_stylesheet **sheet,
  37                 bool inline_style)
  38 {
  39         css_stylesheet_params params;
  40
  41         params.params_version = CSS_STYLESHEET_PARAMS_VERSION_1;
  42         params.level = CSS_LEVEL_DEFAULT;
  43         params.charset = NULL;
  44         params.url = "";
  45         params.title = NULL;
  46         params.allow_quirks = false;
  47         params.inline_style = inline_style;
  48         params.resolve = svgtiny_resolve_url;
  49         params.resolve_pw = NULL;
  50         params.import = NULL;
  51         params.import_pw = NULL;
  52         params.color = NULL;
  53         params.color_pw = NULL;
  54         params.font = NULL;
  55         params.font_pw = NULL;
  56
  57         return css_stylesheet_create(&params, sheet);
  58 }
  59
  60
  61 /**************************/
  62 /* libcss select handlers */
  63 /**************************/
  64 /*
  65  * From here on we implement the "select handler "API defined in
  66  * libcss's include/libcss/select.h and discussed briefly in its
  67  * docs/API document.
  68  */
  69
  70
  71 /**
  72  * Retrieve the given node's name
  73  *
  74  * \param pw     Pointer to the current SVG parser state
  75  * \param node   Libdom SVG node
  76  * \param qname  Address at which to store the node name
  77  *
  78  * \return CSS_OK on success, or CSS_NOMEM if anything goes wrong
  79  */
  80 css_error node_name(void *pw, void *node, css_qname *qname)
  81 {
  82         dom_string *name;
  83         dom_exception err;
  84         struct svgtiny_parse_state *state;
  85
  86         err = dom_node_get_node_name((dom_node *)node, &name);
  87         if (err != DOM_NO_ERR) {
  88                 return CSS_NOMEM;
  89         }
  90
  91         state = (struct svgtiny_parse_state *)pw;
  92         qname->ns = lwc_string_ref(state->interned_svg_xmlns);
  93
  94         err = dom_string_intern(name, &qname->name);
  95         if (err != DOM_NO_ERR) {
  96                 dom_string_unref(name);
  97                 return CSS_NOMEM;
  98         }
  99
 100         dom_string_unref(name);
 101
 102         return CSS_OK;
 103 }