1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/base/src/nsStyleLinkElement.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,130 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + *
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/*
1.11 + * A base class which implements nsIStyleSheetLinkingElement and can
1.12 + * be subclassed by various content nodes that want to load
1.13 + * stylesheets (<style>, <link>, processing instructions, etc).
1.14 + */
1.15 +
1.16 +#ifndef nsStyleLinkElement_h___
1.17 +#define nsStyleLinkElement_h___
1.18 +
1.19 +#include "mozilla/Attributes.h"
1.20 +#include "nsCOMPtr.h"
1.21 +#include "nsIStyleSheetLinkingElement.h"
1.22 +#include "nsCSSStyleSheet.h"
1.23 +#include "nsTArray.h"
1.24 +#include "mozilla/CORSMode.h"
1.25 +
1.26 +class nsIDocument;
1.27 +class nsIURI;
1.28 +
1.29 +namespace mozilla {
1.30 +namespace dom {
1.31 +class ShadowRoot;
1.32 +} // namespace dom
1.33 +} // namespace mozilla
1.34 +
1.35 +class nsStyleLinkElement : public nsIStyleSheetLinkingElement
1.36 +{
1.37 +public:
1.38 + nsStyleLinkElement();
1.39 + virtual ~nsStyleLinkElement();
1.40 +
1.41 + NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) MOZ_OVERRIDE = 0;
1.42 +
1.43 + nsCSSStyleSheet* GetSheet() const { return mStyleSheet; }
1.44 +
1.45 + // nsIStyleSheetLinkingElement
1.46 + NS_IMETHOD SetStyleSheet(nsCSSStyleSheet* aStyleSheet) MOZ_OVERRIDE;
1.47 + NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aStyleSheet) MOZ_OVERRIDE;
1.48 + NS_IMETHOD InitStyleLinkElement(bool aDontLoadStyle) MOZ_OVERRIDE;
1.49 + NS_IMETHOD UpdateStyleSheet(nsICSSLoaderObserver* aObserver,
1.50 + bool* aWillNotify,
1.51 + bool* aIsAlternate) MOZ_OVERRIDE;
1.52 + NS_IMETHOD SetEnableUpdates(bool aEnableUpdates) MOZ_OVERRIDE;
1.53 + NS_IMETHOD GetCharset(nsAString& aCharset) MOZ_OVERRIDE;
1.54 +
1.55 + virtual void OverrideBaseURI(nsIURI* aNewBaseURI) MOZ_OVERRIDE;
1.56 + virtual void SetLineNumber(uint32_t aLineNumber) MOZ_OVERRIDE;
1.57 +
1.58 + enum RelValue {
1.59 + ePREFETCH = 0x00000001,
1.60 + eDNS_PREFETCH = 0x00000002,
1.61 + eSTYLESHEET = 0x00000004,
1.62 + eNEXT = 0x00000008,
1.63 + eALTERNATE = 0x00000010,
1.64 + };
1.65 +
1.66 + // The return value is a bitwise or of 0 or more RelValues
1.67 + static uint32_t ParseLinkTypes(const nsAString& aTypes);
1.68 +
1.69 + void UpdateStyleSheetInternal()
1.70 + {
1.71 + UpdateStyleSheetInternal(nullptr, nullptr);
1.72 + }
1.73 +protected:
1.74 + /**
1.75 + * @param aOldDocument should be non-null only if we're updating because we
1.76 + * removed the node from the document.
1.77 + * @param aForceUpdate true will force the update even if the URI has not
1.78 + * changed. This should be used in cases when something
1.79 + * about the content that affects the resulting sheet
1.80 + * changed but the URI may not have changed.
1.81 + */
1.82 + nsresult UpdateStyleSheetInternal(nsIDocument *aOldDocument,
1.83 + mozilla::dom::ShadowRoot *aOldShadowRoot,
1.84 + bool aForceUpdate = false);
1.85 +
1.86 + void UpdateStyleSheetScopedness(bool aIsNowScoped);
1.87 +
1.88 + virtual already_AddRefed<nsIURI> GetStyleSheetURL(bool* aIsInline) = 0;
1.89 + virtual void GetStyleSheetInfo(nsAString& aTitle,
1.90 + nsAString& aType,
1.91 + nsAString& aMedia,
1.92 + bool* aIsScoped,
1.93 + bool* aIsAlternate) = 0;
1.94 +
1.95 + virtual mozilla::CORSMode GetCORSMode() const
1.96 + {
1.97 + // Default to no CORS
1.98 + return mozilla::CORS_NONE;
1.99 + }
1.100 +
1.101 + // CC methods
1.102 + void Unlink();
1.103 + void Traverse(nsCycleCollectionTraversalCallback &cb);
1.104 +
1.105 +private:
1.106 + /**
1.107 + * @param aOldDocument should be non-null only if we're updating because we
1.108 + * removed the node from the document.
1.109 + * @param aOldShadowRoot The ShadowRoot that used to contain the style.
1.110 + * Passed as a parameter because on an update, the node
1.111 + * is removed from the tree before the sheet is removed
1.112 + * from the ShadowRoot.
1.113 + * @param aForceUpdate true will force the update even if the URI has not
1.114 + * changed. This should be used in cases when something
1.115 + * about the content that affects the resulting sheet
1.116 + * changed but the URI may not have changed.
1.117 + */
1.118 + nsresult DoUpdateStyleSheet(nsIDocument* aOldDocument,
1.119 + mozilla::dom::ShadowRoot* aOldShadowRoot,
1.120 + nsICSSLoaderObserver* aObserver,
1.121 + bool* aWillNotify,
1.122 + bool* aIsAlternate,
1.123 + bool aForceUpdate);
1.124 +
1.125 + nsRefPtr<nsCSSStyleSheet> mStyleSheet;
1.126 +protected:
1.127 + bool mDontLoadStyle;
1.128 + bool mUpdatesEnabled;
1.129 + uint32_t mLineNumber;
1.130 +};
1.131 +
1.132 +#endif /* nsStyleLinkElement_h___ */
1.133 +
