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2c3296d1bb
--HG-- rename : dom/events/nsIMEStateManager.cpp => dom/events/IMEStateManager.cpp rename : dom/events/nsIMEStateManager.h => dom/events/IMEStateManager.h
114 lines
4.9 KiB
C++
114 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsContentEventHandler_h__
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#define nsContentEventHandler_h__
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#include "nsCOMPtr.h"
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#include "nsISelection.h"
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#include "nsRange.h"
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#include "mozilla/EventForwards.h"
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class nsCaret;
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class nsPresContext;
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struct nsRect;
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/*
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* Query Content Event Handler
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* nsContentEventHandler is a helper class for nsEventStateManager.
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* The platforms request some content informations, e.g., the selected text,
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* the offset of the selected text and the text for specified range.
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* This class answers to NS_QUERY_* events from actual contents.
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*/
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class MOZ_STACK_CLASS nsContentEventHandler {
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public:
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nsContentEventHandler(nsPresContext *aPresContext);
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// NS_QUERY_SELECTED_TEXT event handler
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nsresult OnQuerySelectedText(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_TEXT_CONTENT event handler
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nsresult OnQueryTextContent(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_CARET_RECT event handler
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nsresult OnQueryCaretRect(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_TEXT_RECT event handler
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nsresult OnQueryTextRect(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_EDITOR_RECT event handler
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nsresult OnQueryEditorRect(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_CONTENT_STATE event handler
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nsresult OnQueryContentState(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_SELECTION_AS_TRANSFERABLE event handler
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nsresult OnQuerySelectionAsTransferable(
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mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_CHARACTER_AT_POINT event handler
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nsresult OnQueryCharacterAtPoint(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_QUERY_DOM_WIDGET_HITTEST event handler
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nsresult OnQueryDOMWidgetHittest(mozilla::WidgetQueryContentEvent* aEvent);
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// NS_SELECTION_* event
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nsresult OnSelectionEvent(mozilla::WidgetSelectionEvent* aEvent);
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protected:
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nsPresContext* mPresContext;
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nsCOMPtr<nsIPresShell> mPresShell;
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nsCOMPtr<nsISelection> mSelection;
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nsRefPtr<nsRange> mFirstSelectedRange;
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nsCOMPtr<nsIContent> mRootContent;
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nsresult Init(mozilla::WidgetQueryContentEvent* aEvent);
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nsresult Init(mozilla::WidgetSelectionEvent* aEvent);
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// InitCommon() is called from each Init().
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nsresult InitCommon();
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public:
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// FlatText means the text that is generated from DOM tree. The BR elements
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// are replaced to native linefeeds. Other elements are ignored.
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// Get the offset in FlatText of the range. (also used by IMEContentObserver)
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static nsresult GetFlatTextOffsetOfRange(nsIContent* aRootContent,
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nsINode* aNode,
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int32_t aNodeOffset,
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uint32_t* aOffset);
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static nsresult GetFlatTextOffsetOfRange(nsIContent* aRootContent,
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nsRange* aRange,
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uint32_t* aOffset);
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// Get the native text length of a content node excluding any children
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static uint32_t GetNativeTextLength(nsIContent* aContent,
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uint32_t aMaxLength = UINT32_MAX);
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protected:
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// Returns focused content (including its descendant documents).
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nsIContent* GetFocusedContent();
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// Returns true if the content is a plugin host.
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bool IsPlugin(nsIContent* aContent);
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// QueryContentRect() sets the rect of aContent's frame(s) to aEvent.
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nsresult QueryContentRect(nsIContent* aContent,
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mozilla::WidgetQueryContentEvent* aEvent);
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// Make the DOM range from the offset of FlatText and the text length.
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// If aExpandToClusterBoundaries is true, the start offset and the end one are
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// expanded to nearest cluster boundaries.
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nsresult SetRangeFromFlatTextOffset(nsRange* aRange,
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uint32_t aNativeOffset,
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uint32_t aNativeLength,
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bool aExpandToClusterBoundaries,
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uint32_t* aNewNativeOffset = nullptr);
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// Find the first textframe for the range, and get the start offset in
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// the frame.
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nsresult GetStartFrameAndOffset(nsRange* aRange,
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nsIFrame** aFrame,
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int32_t* aOffsetInFrame);
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// Convert the frame relative offset to the root view relative offset.
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nsresult ConvertToRootViewRelativeOffset(nsIFrame* aFrame,
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nsRect& aRect);
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// Expand aXPOffset to the nearest offset in cluster boundary. aForward is
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// true, it is expanded to forward.
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nsresult ExpandToClusterBoundary(nsIContent* aContent, bool aForward,
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uint32_t* aXPOffset);
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};
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#endif // nsContentEventHandler_h__
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