| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef LinkStyle_h |
| #define LinkStyle_h |
| |
| #include "core/dom/Node.h" |
| #include "core/dom/StyleEngine.h" |
| #include "core/fetch/ResourceOwner.h" |
| #include "core/html/LinkResource.h" |
| #include "core/loader/resource/StyleSheetResource.h" |
| #include "core/loader/resource/StyleSheetResourceClient.h" |
| |
| namespace blink { |
| |
| class HTMLLinkElement; |
| // |
| // LinkStyle handles dynamically change-able link resources, which is |
| // typically @rel="stylesheet". |
| // |
| // It could be @rel="shortcut icon" or something else though. Each of |
| // types might better be handled by a separate class, but dynamically |
| // changing @rel makes it harder to move such a design so we are |
| // sticking current way so far. |
| // |
| class LinkStyle final : public LinkResource, ResourceOwner<StyleSheetResource> { |
| USING_GARBAGE_COLLECTED_MIXIN(LinkStyle); |
| |
| public: |
| static LinkStyle* create(HTMLLinkElement* owner); |
| |
| explicit LinkStyle(HTMLLinkElement* owner); |
| ~LinkStyle() override; |
| |
| LinkResourceType type() const override { return Style; } |
| void process() override; |
| void ownerRemoved() override; |
| bool hasLoaded() const override { return m_loadedSheet; } |
| DECLARE_VIRTUAL_TRACE(); |
| |
| void startLoadingDynamicSheet(); |
| void notifyLoadedSheetAndAllCriticalSubresources( |
| Node::LoadedSheetErrorStatus); |
| bool sheetLoaded(); |
| |
| void setDisabledState(bool); |
| void setSheetTitle(const String&); |
| |
| bool styleSheetIsLoading() const; |
| bool hasSheet() const { return m_sheet; } |
| bool isDisabled() const { return m_disabledState == Disabled; } |
| bool isEnabledViaScript() const { |
| return m_disabledState == EnabledViaScript; |
| } |
| bool isUnset() const { return m_disabledState == Unset; } |
| |
| CSSStyleSheet* sheet() const { return m_sheet.get(); } |
| |
| private: |
| // From StyleSheetResourceClient |
| void setCSSStyleSheet(const String& href, |
| const KURL& baseURL, |
| const String& charset, |
| const CSSStyleSheetResource*) override; |
| String debugName() const override { return "LinkStyle"; } |
| enum LoadReturnValue { Loaded, NotNeeded, Bail }; |
| LoadReturnValue loadStylesheetIfNeeded(const LinkRequestBuilder&, |
| const String& type); |
| |
| enum DisabledState { Unset, EnabledViaScript, Disabled }; |
| |
| enum PendingSheetType { None, NonBlocking, Blocking }; |
| |
| void clearSheet(); |
| void addPendingSheet(PendingSheetType); |
| void removePendingSheet(); |
| Document& document(); |
| |
| void setCrossOriginStylesheetStatus(CSSStyleSheet*); |
| void setFetchFollowingCORS() { |
| DCHECK(!m_fetchFollowingCORS); |
| m_fetchFollowingCORS = true; |
| } |
| void clearFetchFollowingCORS() { m_fetchFollowingCORS = false; } |
| |
| Member<CSSStyleSheet> m_sheet; |
| DisabledState m_disabledState; |
| PendingSheetType m_pendingSheetType; |
| StyleEngineContext m_styleEngineContext; |
| bool m_loading; |
| bool m_firedLoad; |
| bool m_loadedSheet; |
| bool m_fetchFollowingCORS; |
| }; |
| |
| } // namespace blink |
| |
| #endif |