| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_IMPORTS_HTML_IMPORT_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_IMPORTS_HTML_IMPORT_H_ |
| |
| #include "third_party/blink/renderer/core/html/imports/html_import_state.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/tree_node.h" |
| |
| namespace blink { |
| |
| class Document; |
| class HTMLImportLoader; |
| |
| // The superclass of HTMLImportTreeRoot and HTMLImportChild |
| // This represents the import tree data structure. |
| class HTMLImport : public GarbageCollected<HTMLImport>, |
| public TreeNode<HTMLImport> { |
| public: |
| enum SyncMode { kSync = 0, kAsync = 1 }; |
| |
| virtual ~HTMLImport() = default; |
| |
| // FIXME: Consider returning HTMLImportTreeRoot. |
| HTMLImport* Root(); |
| bool Precedes(HTMLImport*); |
| bool IsRoot() const { return !Parent(); } |
| bool IsSync() const { return SyncMode(sync_) == kSync; } |
| bool FormsCycle() const; |
| const HTMLImportState& GetState() const { return state_; } |
| |
| void AppendImport(HTMLImport*); |
| |
| virtual Document* GetDocument() const = 0; |
| virtual bool HasFinishedLoading() const = 0; |
| virtual HTMLImportLoader* Loader() const { return nullptr; } |
| virtual void StateWillChange() {} |
| virtual void StateDidChange(); |
| |
| virtual void Trace(Visitor* visitor) const {} |
| |
| protected: |
| // Stating from most conservative state. |
| // It will be corrected through state update flow. |
| explicit HTMLImport(SyncMode sync) : sync_(sync) {} |
| |
| static void RecalcTreeState(HTMLImport* root); |
| |
| private: |
| HTMLImportState state_; |
| unsigned sync_ : 1; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_IMPORTS_HTML_IMPORT_H_ |