gecko-dev/dom/base/nsIStyleSheetLinkingElement.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsIStyleSheetLinkingElement_h__
#define nsIStyleSheetLinkingElement_h__
#include "nsISupports.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/Result.h"
class nsIContent;
class nsICSSLoaderObserver;
class nsIPrincipal;
class nsIURI;
#define NS_ISTYLESHEETLINKINGELEMENT_IID \
{ 0xa8b79f3b, 0x9d18, 0x4f9c, \
{ 0xb1, 0xaa, 0x8c, 0x9b, 0x1b, 0xaa, 0xac, 0xad } }
class nsIStyleSheetLinkingElement : public nsISupports {
public:
enum class ForceUpdate
{
Yes,
No,
};
enum class Completed
{
Yes,
No,
};
enum class HasAlternateRel
{
Yes,
No
};
enum class IsAlternate
{
Yes,
No,
};
enum class IsInline
{
Yes,
No
};
enum class MediaMatched
{
Yes,
No,
};
struct Update
{
private:
bool mWillNotify;
bool mIsAlternate;
bool mMediaMatched;
public:
Update()
: mWillNotify(false)
, mIsAlternate(false)
, mMediaMatched(false)
{ }
Update(Completed aCompleted, IsAlternate aIsAlternate, MediaMatched aMediaMatched)
: mWillNotify(aCompleted == Completed::No)
, mIsAlternate(aIsAlternate == IsAlternate::Yes)
, mMediaMatched(aMediaMatched == MediaMatched::Yes)
{ }
bool WillNotify() const
{
return mWillNotify;
}
bool ShouldBlock() const
{
if (!mWillNotify) {
return false;
}
return !mIsAlternate && mMediaMatched;
}
};
struct MOZ_STACK_CLASS SheetInfo
{
nsIContent* mContent;
// FIXME(emilio): do these really need to be strong refs?
nsCOMPtr<nsIURI> mURI;
// The principal of the scripted caller that initiated the load, if
// available. Otherwise null.
nsCOMPtr<nsIPrincipal> mTriggeringPrincipal;
mozilla::net::ReferrerPolicy mReferrerPolicy;
mozilla::CORSMode mCORSMode;
nsString mTitle;
nsString mMedia;
nsString mIntegrity;
bool mHasAlternateRel;
bool mIsInline;
SheetInfo(const nsIDocument&,
nsIContent*,
already_AddRefed<nsIURI> aURI,
already_AddRefed<nsIPrincipal> aTriggeringPrincipal,
mozilla::net::ReferrerPolicy aReferrerPolicy,
mozilla::CORSMode aCORSMode,
const nsAString& aTitle,
const nsAString& aMedia,
HasAlternateRel aHasAlternateRel,
IsInline aIsInline);
~SheetInfo();
};
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISTYLESHEETLINKINGELEMENT_IID)
/**
* Used to make the association between a style sheet and
* the element that linked it to the document.
*
* @param aStyleSheet the style sheet associated with this
* element.
*/
virtual void SetStyleSheet(mozilla::StyleSheet* aStyleSheet) = 0;
/**
* Used to obtain the style sheet linked in by this element.
*
* @return the style sheet associated with this element.
*/
virtual mozilla::StyleSheet* GetStyleSheet() = 0;
/**
* Initialize the stylesheet linking element. If aDontLoadStyle is
* true the element will ignore the first modification to the
* element that would cause a stylesheet to be loaded. Subsequent
* modifications to the element will not be ignored.
*/
virtual void InitStyleLinkElement(bool aDontLoadStyle) = 0;
/**
* Tells this element to update the stylesheet.
*
* @param aObserver observer to notify once the stylesheet is loaded.
* This will be passed to the CSSLoader
*/
virtual mozilla::Result<Update, nsresult>
UpdateStyleSheet(nsICSSLoaderObserver* aObserver) = 0;
/**
* Tells this element whether to update the stylesheet when the
* element's properties change.
*
* @param aEnableUpdates update on changes or not.
*/
virtual void SetEnableUpdates(bool aEnableUpdates) = 0;
/**
* Gets the charset that the element claims the style sheet is in.
* Can return empty string to indicate that we have no charset
* information.
*
* @param aCharset the charset
*/
virtual void GetCharset(nsAString& aCharset) = 0;
/**
* Tells this element to use a different base URI. This is used for
* proper loading of xml-stylesheet processing instructions in XUL overlays
* and is only currently used by nsXMLStylesheetPI.
*
* @param aNewBaseURI the new base URI, nullptr to use the default base URI.
*/
virtual void OverrideBaseURI(nsIURI* aNewBaseURI) = 0;
// This doesn't entirely belong here since they only make sense for
// some types of linking elements, but it's a better place than
// anywhere else.
virtual void SetLineNumber(uint32_t aLineNumber) = 0;
/**
* Get the line number, as previously set by SetLineNumber.
*
* @return the line number of this element; or 1 if no line number
* was set
*/
virtual uint32_t GetLineNumber() = 0;
// This doesn't entirely belong here since they only make sense for
// some types of linking elements, but it's a better place than
// anywhere else.
virtual void SetColumnNumber(uint32_t aColumnNumber) = 0;
/**
* Get the column number, as previously set by SetColumnNumber.
*
* @return the column number of this element; or 1 if no column number
* was set
*/
virtual uint32_t GetColumnNumber() = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIStyleSheetLinkingElement,
NS_ISTYLESHEETLINKINGELEMENT_IID)
#endif // nsILinkingElement_h__