| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com) |
| * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com) |
| * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. |
| * All rights reserved. |
| * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org> |
| * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. |
| * (http://www.torchmobile.com/) |
| * Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| * Copyright (C) Research In Motion Limited 2011. All rights reserved. |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "third_party/blink/renderer/core/css/page_rule_collector.h" |
| |
| #include <algorithm> |
| #include "third_party/blink/renderer/core/css/css_property_value_set.h" |
| #include "third_party/blink/renderer/core/css/style_rule.h" |
| #include "third_party/blink/renderer/core/style/computed_style.h" |
| |
| namespace blink { |
| |
| static inline bool ComparePageRules(const StyleRulePage* r1, |
| const StyleRulePage* r2) { |
| return r1->Selector()->Specificity() < r2->Selector()->Specificity(); |
| } |
| |
| bool PageRuleCollector::IsLeftPage(const ComputedStyle* root_element_style, |
| int page_index) const { |
| bool is_first_page_left = false; |
| DCHECK(root_element_style); |
| if (!root_element_style->IsLeftToRightDirection()) |
| is_first_page_left = true; |
| |
| return (page_index + (is_first_page_left ? 1 : 0)) % 2; |
| } |
| |
| bool PageRuleCollector::IsFirstPage(int page_index) const { |
| // FIXME: In case of forced left/right page, page at index 1 (not 0) can be |
| // the first page. |
| return (!page_index); |
| } |
| |
| String PageRuleCollector::PageName(int /* pageIndex */) const { |
| // FIXME: Implement page index to page name mapping. |
| return ""; |
| } |
| |
| PageRuleCollector::PageRuleCollector(const ComputedStyle* root_element_style, |
| int page_index) |
| : is_left_page_(IsLeftPage(root_element_style, page_index)), |
| is_first_page_(IsFirstPage(page_index)), |
| page_name_(PageName(page_index)) {} |
| |
| void PageRuleCollector::MatchPageRules(RuleSet* rules) { |
| if (!rules) |
| return; |
| |
| rules->CompactRulesIfNeeded(); |
| HeapVector<Member<StyleRulePage>> matched_page_rules; |
| MatchPageRulesForList(matched_page_rules, rules->PageRules(), is_left_page_, |
| is_first_page_, page_name_); |
| if (matched_page_rules.IsEmpty()) |
| return; |
| |
| std::stable_sort(matched_page_rules.begin(), matched_page_rules.end(), |
| ComparePageRules); |
| |
| for (unsigned i = 0; i < matched_page_rules.size(); i++) |
| result_.AddMatchedProperties(&matched_page_rules[i]->Properties()); |
| } |
| |
| static bool CheckPageSelectorComponents(const CSSSelector* selector, |
| bool is_left_page, |
| bool is_first_page, |
| const String& page_name) { |
| for (const CSSSelector* component = selector; component; |
| component = component->TagHistory()) { |
| if (component->Match() == CSSSelector::kTag) { |
| const AtomicString& local_name = component->TagQName().LocalName(); |
| DCHECK_NE(local_name, CSSSelector::UniversalSelectorAtom()); |
| if (local_name != page_name) |
| return false; |
| } |
| |
| CSSSelector::PseudoType pseudo_type = component->GetPseudoType(); |
| if ((pseudo_type == CSSSelector::kPseudoLeftPage && !is_left_page) || |
| (pseudo_type == CSSSelector::kPseudoRightPage && is_left_page) || |
| (pseudo_type == CSSSelector::kPseudoFirstPage && !is_first_page)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void PageRuleCollector::MatchPageRulesForList( |
| HeapVector<Member<StyleRulePage>>& matched_rules, |
| const HeapVector<Member<StyleRulePage>>& rules, |
| bool is_left_page, |
| bool is_first_page, |
| const String& page_name) { |
| for (unsigned i = 0; i < rules.size(); ++i) { |
| StyleRulePage* rule = rules[i]; |
| |
| if (!CheckPageSelectorComponents(rule->Selector(), is_left_page, |
| is_first_page, page_name)) |
| continue; |
| |
| // If the rule has no properties to apply, then ignore it. |
| const CSSPropertyValueSet& properties = rule->Properties(); |
| if (properties.IsEmpty()) |
| continue; |
| |
| // Add this rule to our list of matched rules. |
| matched_rules.push_back(rule); |
| } |
| } |
| |
| } // namespace blink |