mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 17:58:18 +03:00
6f4c380d95
Using int was a mistake. This patch changes String, StringImpl, StringView and StringBuilder to use size_t instead of int for lengths. Obviously a lot of code needs to change as a result of this.
271 lines
11 KiB
C++
271 lines
11 KiB
C++
#include <LibHTML/CSS/SelectorEngine.h>
|
|
#include <LibHTML/CSS/StyleResolver.h>
|
|
#include <LibHTML/CSS/StyleSheet.h>
|
|
#include <LibHTML/DOM/Document.h>
|
|
#include <LibHTML/DOM/Element.h>
|
|
#include <LibHTML/Dump.h>
|
|
#include <LibHTML/Parser/CSSParser.h>
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
|
|
StyleResolver::StyleResolver(Document& document)
|
|
: m_document(document)
|
|
{
|
|
}
|
|
|
|
StyleResolver::~StyleResolver()
|
|
{
|
|
}
|
|
|
|
static StyleSheet& default_stylesheet()
|
|
{
|
|
static StyleSheet* sheet;
|
|
if (!sheet) {
|
|
extern const char default_stylesheet_source[];
|
|
String css = default_stylesheet_source;
|
|
sheet = parse_css(css).leak_ref();
|
|
}
|
|
return *sheet;
|
|
}
|
|
|
|
template<typename Callback>
|
|
void StyleResolver::for_each_stylesheet(Callback callback) const
|
|
{
|
|
callback(default_stylesheet());
|
|
for (auto& sheet : document().stylesheets()) {
|
|
callback(sheet);
|
|
}
|
|
}
|
|
|
|
NonnullRefPtrVector<StyleRule> StyleResolver::collect_matching_rules(const Element& element) const
|
|
{
|
|
NonnullRefPtrVector<StyleRule> matching_rules;
|
|
|
|
for_each_stylesheet([&](auto& sheet) {
|
|
for (auto& rule : sheet.rules()) {
|
|
for (auto& selector : rule.selectors()) {
|
|
if (SelectorEngine::matches(selector, element)) {
|
|
matching_rules.append(rule);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
#ifdef HTML_DEBUG
|
|
dbgprintf("Rules matching Element{%p}\n", &element);
|
|
for (auto& rule : matching_rules) {
|
|
dump_rule(rule);
|
|
}
|
|
#endif
|
|
|
|
return matching_rules;
|
|
}
|
|
|
|
bool StyleResolver::is_inherited_property(CSS::PropertyID property_id)
|
|
{
|
|
static HashTable<CSS::PropertyID> inherited_properties;
|
|
if (inherited_properties.is_empty()) {
|
|
inherited_properties.set(CSS::PropertyID::BorderCollapse);
|
|
inherited_properties.set(CSS::PropertyID::BorderSpacing);
|
|
inherited_properties.set(CSS::PropertyID::Color);
|
|
inherited_properties.set(CSS::PropertyID::FontFamily);
|
|
inherited_properties.set(CSS::PropertyID::FontSize);
|
|
inherited_properties.set(CSS::PropertyID::FontStyle);
|
|
inherited_properties.set(CSS::PropertyID::FontVariant);
|
|
inherited_properties.set(CSS::PropertyID::FontWeight);
|
|
inherited_properties.set(CSS::PropertyID::LetterSpacing);
|
|
inherited_properties.set(CSS::PropertyID::LineHeight);
|
|
inherited_properties.set(CSS::PropertyID::ListStyle);
|
|
inherited_properties.set(CSS::PropertyID::ListStyleImage);
|
|
inherited_properties.set(CSS::PropertyID::ListStylePosition);
|
|
inherited_properties.set(CSS::PropertyID::ListStyleType);
|
|
inherited_properties.set(CSS::PropertyID::TextAlign);
|
|
inherited_properties.set(CSS::PropertyID::TextIndent);
|
|
inherited_properties.set(CSS::PropertyID::TextTransform);
|
|
inherited_properties.set(CSS::PropertyID::Visibility);
|
|
inherited_properties.set(CSS::PropertyID::WhiteSpace);
|
|
inherited_properties.set(CSS::PropertyID::WordSpacing);
|
|
|
|
// FIXME: This property is not supposed to be inherited, but we currently
|
|
// rely on inheritance to propagate decorations into line boxes.
|
|
inherited_properties.set(CSS::PropertyID::TextDecoration);
|
|
}
|
|
return inherited_properties.contains(property_id);
|
|
}
|
|
|
|
static Vector<String> split_on_whitespace(const StringView& string)
|
|
{
|
|
if (string.is_empty())
|
|
return {};
|
|
|
|
Vector<String> v;
|
|
size_t substart = 0;
|
|
for (size_t i = 0; i < string.length(); ++i) {
|
|
char ch = string.characters_without_null_termination()[i];
|
|
if (isspace(ch)) {
|
|
size_t sublen = i - substart;
|
|
if (sublen != 0)
|
|
v.append(string.substring_view(substart, sublen));
|
|
substart = i + 1;
|
|
}
|
|
}
|
|
size_t taillen = string.length() - substart;
|
|
if (taillen != 0)
|
|
v.append(string.substring_view(substart, taillen));
|
|
return v;
|
|
}
|
|
|
|
static void set_property_expanding_shorthands(StyleProperties& style, CSS::PropertyID property_id, const StyleValue& value)
|
|
{
|
|
if (property_id == CSS::PropertyID::BorderStyle) {
|
|
style.set_property(CSS::PropertyID::BorderTopStyle, value);
|
|
style.set_property(CSS::PropertyID::BorderRightStyle, value);
|
|
style.set_property(CSS::PropertyID::BorderBottomStyle, value);
|
|
style.set_property(CSS::PropertyID::BorderLeftStyle, value);
|
|
return;
|
|
}
|
|
|
|
if (property_id == CSS::PropertyID::BorderWidth) {
|
|
style.set_property(CSS::PropertyID::BorderTopWidth, value);
|
|
style.set_property(CSS::PropertyID::BorderRightWidth, value);
|
|
style.set_property(CSS::PropertyID::BorderBottomWidth, value);
|
|
style.set_property(CSS::PropertyID::BorderLeftWidth, value);
|
|
return;
|
|
}
|
|
|
|
if (property_id == CSS::PropertyID::BorderColor) {
|
|
style.set_property(CSS::PropertyID::BorderTopColor, value);
|
|
style.set_property(CSS::PropertyID::BorderRightColor, value);
|
|
style.set_property(CSS::PropertyID::BorderBottomColor, value);
|
|
style.set_property(CSS::PropertyID::BorderLeftColor, value);
|
|
return;
|
|
}
|
|
|
|
if (property_id == CSS::PropertyID::Margin) {
|
|
if (value.is_length()) {
|
|
style.set_property(CSS::PropertyID::MarginTop, value);
|
|
style.set_property(CSS::PropertyID::MarginRight, value);
|
|
style.set_property(CSS::PropertyID::MarginBottom, value);
|
|
style.set_property(CSS::PropertyID::MarginLeft, value);
|
|
return;
|
|
}
|
|
if (value.is_string()) {
|
|
auto parts = split_on_whitespace(value.to_string());
|
|
if (parts.size() == 2) {
|
|
auto vertical = parse_css_value(parts[0]);
|
|
auto horizontal = parse_css_value(parts[1]);
|
|
style.set_property(CSS::PropertyID::MarginTop, vertical);
|
|
style.set_property(CSS::PropertyID::MarginBottom, vertical);
|
|
style.set_property(CSS::PropertyID::MarginLeft, horizontal);
|
|
style.set_property(CSS::PropertyID::MarginRight, horizontal);
|
|
return;
|
|
}
|
|
if (parts.size() == 3) {
|
|
auto top = parse_css_value(parts[0]);
|
|
auto horizontal = parse_css_value(parts[1]);
|
|
auto bottom = parse_css_value(parts[2]);
|
|
style.set_property(CSS::PropertyID::MarginTop, top);
|
|
style.set_property(CSS::PropertyID::MarginBottom, bottom);
|
|
style.set_property(CSS::PropertyID::MarginLeft, horizontal);
|
|
style.set_property(CSS::PropertyID::MarginRight, horizontal);
|
|
return;
|
|
}
|
|
if (parts.size() == 4) {
|
|
auto top = parse_css_value(parts[0]);
|
|
auto right = parse_css_value(parts[1]);
|
|
auto bottom = parse_css_value(parts[2]);
|
|
auto left = parse_css_value(parts[3]);
|
|
style.set_property(CSS::PropertyID::MarginTop, top);
|
|
style.set_property(CSS::PropertyID::MarginBottom, bottom);
|
|
style.set_property(CSS::PropertyID::MarginLeft, left);
|
|
style.set_property(CSS::PropertyID::MarginRight, right);
|
|
return;
|
|
}
|
|
dbg() << "Unsure what to do with CSS margin value '" << value.to_string() << "'";
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (property_id == CSS::PropertyID::Padding) {
|
|
if (value.is_length()) {
|
|
style.set_property(CSS::PropertyID::PaddingTop, value);
|
|
style.set_property(CSS::PropertyID::PaddingRight, value);
|
|
style.set_property(CSS::PropertyID::PaddingBottom, value);
|
|
style.set_property(CSS::PropertyID::PaddingLeft, value);
|
|
return;
|
|
}
|
|
if (value.is_string()) {
|
|
auto parts = split_on_whitespace(value.to_string());
|
|
if (parts.size() == 2) {
|
|
auto vertical = parse_css_value(parts[0]);
|
|
auto horizontal = parse_css_value(parts[1]);
|
|
style.set_property(CSS::PropertyID::PaddingTop, vertical);
|
|
style.set_property(CSS::PropertyID::PaddingBottom, vertical);
|
|
style.set_property(CSS::PropertyID::PaddingLeft, horizontal);
|
|
style.set_property(CSS::PropertyID::PaddingRight, horizontal);
|
|
return;
|
|
}
|
|
if (parts.size() == 3) {
|
|
auto top = parse_css_value(parts[0]);
|
|
auto horizontal = parse_css_value(parts[1]);
|
|
auto bottom = parse_css_value(parts[2]);
|
|
style.set_property(CSS::PropertyID::PaddingTop, top);
|
|
style.set_property(CSS::PropertyID::PaddingBottom, bottom);
|
|
style.set_property(CSS::PropertyID::PaddingLeft, horizontal);
|
|
style.set_property(CSS::PropertyID::PaddingRight, horizontal);
|
|
return;
|
|
}
|
|
if (parts.size() == 4) {
|
|
auto top = parse_css_value(parts[0]);
|
|
auto right = parse_css_value(parts[1]);
|
|
auto bottom = parse_css_value(parts[2]);
|
|
auto left = parse_css_value(parts[3]);
|
|
style.set_property(CSS::PropertyID::PaddingTop, top);
|
|
style.set_property(CSS::PropertyID::PaddingBottom, bottom);
|
|
style.set_property(CSS::PropertyID::PaddingLeft, left);
|
|
style.set_property(CSS::PropertyID::PaddingRight, right);
|
|
return;
|
|
}
|
|
dbg() << "Unsure what to do with CSS padding value '" << value.to_string() << "'";
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
style.set_property(property_id, value);
|
|
}
|
|
|
|
NonnullRefPtr<StyleProperties> StyleResolver::resolve_style(const Element& element, const StyleProperties* parent_style) const
|
|
{
|
|
auto style = StyleProperties::create();
|
|
|
|
if (parent_style) {
|
|
parent_style->for_each_property([&](auto property_id, auto& value) {
|
|
if (is_inherited_property(property_id))
|
|
set_property_expanding_shorthands(style, property_id, value);
|
|
});
|
|
}
|
|
|
|
element.apply_presentational_hints(*style);
|
|
|
|
auto matching_rules = collect_matching_rules(element);
|
|
for (auto& rule : matching_rules) {
|
|
for (auto& property : rule.declaration().properties()) {
|
|
set_property_expanding_shorthands(style, property.property_id, property.value);
|
|
}
|
|
}
|
|
|
|
auto style_attribute = element.attribute("style");
|
|
if (!style_attribute.is_null()) {
|
|
if (auto declaration = parse_css_declaration(style_attribute)) {
|
|
for (auto& property : declaration->properties()) {
|
|
set_property_expanding_shorthands(style, property.property_id, property.value);
|
|
}
|
|
}
|
|
}
|
|
|
|
return style;
|
|
}
|