| /* |
| * Copyright 2015 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "cobalt/dom/html_style_element.h" |
| |
| #include <string> |
| |
| #include "cobalt/cssom/css_parser.h" |
| #include "cobalt/dom/csp_delegate.h" |
| #include "cobalt/dom/document.h" |
| #include "cobalt/dom/html_element_context.h" |
| |
| namespace cobalt { |
| namespace dom { |
| |
| // static |
| const char HTMLStyleElement::kTagName[] = "style"; |
| |
| HTMLStyleElement::HTMLStyleElement(Document* document) |
| : HTMLElement(document, base::Token(kTagName)), |
| is_parser_inserted_(false), |
| inline_style_location_(GetSourceLocationName(), 1, 1) {} |
| |
| void HTMLStyleElement::OnInsertedIntoDocument() { |
| HTMLElement::OnInsertedIntoDocument(); |
| if (!is_parser_inserted_) { |
| Process(); |
| } |
| } |
| |
| void HTMLStyleElement::OnParserStartTag( |
| const base::SourceLocation& opening_tag_location) { |
| inline_style_location_ = opening_tag_location; |
| ++inline_style_location_.column_number; // CSS code starts after ">". |
| is_parser_inserted_ = true; |
| } |
| |
| void HTMLStyleElement::OnParserEndTag() { Process(); } |
| |
| scoped_refptr<HTMLStyleElement> HTMLStyleElement::AsHTMLStyleElement() { |
| return this; |
| } |
| |
| void HTMLStyleElement::Process() { |
| Document* document = node_document(); |
| |
| // If the document has no browsing context, do not parse or apply the style |
| // sheet. |
| if (!document->html_element_context()) { |
| return; |
| } |
| |
| CspDelegate* csp_delegate = document->csp_delegate(); |
| // If the style element has a valid nonce, we always permit it. |
| const bool bypass_csp = csp_delegate->IsValidNonce( |
| CspDelegate::kStyle, GetAttribute("nonce").value_or("")); |
| |
| base::optional<std::string> content = text_content(); |
| const std::string& text = content.value_or(EmptyString()); |
| if (bypass_csp || text.empty() || |
| csp_delegate->AllowInline(CspDelegate::kStyle, inline_style_location_, |
| text)) { |
| scoped_refptr<cssom::CSSStyleSheet> style_sheet = |
| document->html_element_context()->css_parser()->ParseStyleSheet( |
| text, inline_style_location_); |
| style_sheet->SetLocationUrl(GURL(inline_style_location_.file_path)); |
| document->style_sheets()->Append(style_sheet); |
| style_sheet_ = style_sheet; |
| } else { |
| // Report a violation. |
| PostToDispatchEvent(FROM_HERE, base::Tokens::error()); |
| } |
| } |
| |
| } // namespace dom |
| } // namespace cobalt |