diff options
Diffstat (limited to 'src/xml')
| -rw-r--r-- | src/xml/repr-css.cpp | 71 | ||||
| -rw-r--r-- | src/xml/repr.h | 1 |
2 files changed, 72 insertions, 0 deletions
diff --git a/src/xml/repr-css.cpp b/src/xml/repr-css.cpp index 4fb1223de..19f3f1d6c 100644 --- a/src/xml/repr-css.cpp +++ b/src/xml/repr-css.cpp @@ -89,6 +89,77 @@ SPCSSAttr *sp_repr_css_attr(Node *repr, gchar const *attr) return css; } + +/** + * Attempt to parse the passed string as a hexadecimal RGB or RGBA color. + * @param text The Glib::ustring to parse + * @return New CSS style representation if the parsing was successful, NULL otherwise + */ +SPCSSAttr *sp_repr_css_attr_parse_color_to_fill(const Glib::ustring &text) +{ +// TODO reuse existing code instead of replicating here. + Glib::ustring::size_type len = text.bytes(); + char *str = const_cast<char *>(text.data()); + bool attempt_alpha = false; + if ( !str || ( *str == '\0' ) ) { + return NULL; // this is OK due to boolean short-circuit + } + + // those conditionals guard against parsing e.g. the string "fab" as "fab000" + // (incomplete color) and "45fab71" as "45fab710" (incomplete alpha) + if ( *str == '#' ) { + if ( len < 7 ) { + return NULL; + } + if ( len >= 9 ) { + attempt_alpha = true; + } + } else { + if ( len < 6 ) { + return NULL; + } + if ( len >= 8 ) { + attempt_alpha = true; + } + } + + unsigned int color = 0, alpha = 0xff; + + // skip a leading #, if present + if ( *str == '#' ) { + ++str; + } + + // try to parse first 6 digits + int res = sscanf(str, "%6x", &color); + if ( res && ( res != EOF ) ) { + if (attempt_alpha) {// try to parse alpha if there's enough characters + sscanf(str + 6, "%2x", &alpha); + if ( !res || res == EOF ) { + alpha = 0xff; + } + } + + SPCSSAttr *color_css = sp_repr_css_attr_new(); + + // print and set properties + gchar color_str[16]; + g_snprintf(color_str, 16, "#%06x", color); + sp_repr_css_set_property(color_css, "fill", color_str); + + float opacity = static_cast<float>(alpha)/static_cast<float>(0xff); + if (opacity > 1.0) { + opacity = 1.0; // safeguard + } + Inkscape::CSSOStringStream opcss; + opcss << opacity; + sp_repr_css_set_property(color_css, "fill-opacity", opcss.str().data()); + return color_css; + } + return NULL; +} + + /** * Adds an attribute to an existing SPCSAttr with the cascaded value including all parents. */ diff --git a/src/xml/repr.h b/src/xml/repr.h index 3eee45385..86a798e3e 100644 --- a/src/xml/repr.h +++ b/src/xml/repr.h @@ -70,6 +70,7 @@ bool sp_repr_save_rebased_file(Inkscape::XML::Document *doc, gchar const *filena SPCSSAttr *sp_repr_css_attr_new(void); void sp_repr_css_attr_unref(SPCSSAttr *css); SPCSSAttr *sp_repr_css_attr(Inkscape::XML::Node *repr, gchar const *attr); +SPCSSAttr *sp_repr_css_attr_parse_color_to_fill(const Glib::ustring &text); SPCSSAttr *sp_repr_css_attr_inherited(Inkscape::XML::Node *repr, gchar const *attr); gchar const *sp_repr_css_property(SPCSSAttr *css, gchar const *name, gchar const *defval); |