dom/events/ContentEventHandler.h@97036ab72558 (annotated)
dom/events/ContentEventHandler.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef mozilla_ContentEventHandler_h_ |
| michael@0 | 7 | #define mozilla_ContentEventHandler_h_ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "mozilla/EventForwards.h" |
| michael@0 | 10 | #include "nsCOMPtr.h" |
| michael@0 | 11 | #include "nsISelection.h" |
| michael@0 | 12 | #include "nsRange.h" |
| michael@0 | 13 | |
| michael@0 | 14 | class nsPresContext; |
| michael@0 | 15 | |
| michael@0 | 16 | struct nsRect; |
| michael@0 | 17 | |
| michael@0 | 18 | namespace mozilla { |
| michael@0 | 19 | |
| michael@0 | 20 | enum LineBreakType |
| michael@0 | 21 | { |
| michael@0 | 22 | LINE_BREAK_TYPE_NATIVE, |
| michael@0 | 23 | LINE_BREAK_TYPE_XP |
| michael@0 | 24 | }; |
| michael@0 | 25 | |
| michael@0 | 26 | /* |
| michael@0 | 27 | * Query Content Event Handler |
| michael@0 | 28 | * ContentEventHandler is a helper class for EventStateManager. |
| michael@0 | 29 | * The platforms request some content informations, e.g., the selected text, |
| michael@0 | 30 | * the offset of the selected text and the text for specified range. |
| michael@0 | 31 | * This class answers to NS_QUERY_* events from actual contents. |
| michael@0 | 32 | */ |
| michael@0 | 33 | |
| michael@0 | 34 | class MOZ_STACK_CLASS ContentEventHandler |
| michael@0 | 35 | { |
| michael@0 | 36 | public: |
| michael@0 | 37 | ContentEventHandler(nsPresContext* aPresContext); |
| michael@0 | 38 | |
| michael@0 | 39 | // NS_QUERY_SELECTED_TEXT event handler |
| michael@0 | 40 | nsresult OnQuerySelectedText(WidgetQueryContentEvent* aEvent); |
| michael@0 | 41 | // NS_QUERY_TEXT_CONTENT event handler |
| michael@0 | 42 | nsresult OnQueryTextContent(WidgetQueryContentEvent* aEvent); |
| michael@0 | 43 | // NS_QUERY_CARET_RECT event handler |
| michael@0 | 44 | nsresult OnQueryCaretRect(WidgetQueryContentEvent* aEvent); |
| michael@0 | 45 | // NS_QUERY_TEXT_RECT event handler |
| michael@0 | 46 | nsresult OnQueryTextRect(WidgetQueryContentEvent* aEvent); |
| michael@0 | 47 | // NS_QUERY_EDITOR_RECT event handler |
| michael@0 | 48 | nsresult OnQueryEditorRect(WidgetQueryContentEvent* aEvent); |
| michael@0 | 49 | // NS_QUERY_CONTENT_STATE event handler |
| michael@0 | 50 | nsresult OnQueryContentState(WidgetQueryContentEvent* aEvent); |
| michael@0 | 51 | // NS_QUERY_SELECTION_AS_TRANSFERABLE event handler |
| michael@0 | 52 | nsresult OnQuerySelectionAsTransferable(WidgetQueryContentEvent* aEvent); |
| michael@0 | 53 | // NS_QUERY_CHARACTER_AT_POINT event handler |
| michael@0 | 54 | nsresult OnQueryCharacterAtPoint(WidgetQueryContentEvent* aEvent); |
| michael@0 | 55 | // NS_QUERY_DOM_WIDGET_HITTEST event handler |
| michael@0 | 56 | nsresult OnQueryDOMWidgetHittest(WidgetQueryContentEvent* aEvent); |
| michael@0 | 57 | |
| michael@0 | 58 | // NS_SELECTION_* event |
| michael@0 | 59 | nsresult OnSelectionEvent(WidgetSelectionEvent* aEvent); |
| michael@0 | 60 | |
| michael@0 | 61 | protected: |
| michael@0 | 62 | nsPresContext* mPresContext; |
| michael@0 | 63 | nsCOMPtr<nsIPresShell> mPresShell; |
| michael@0 | 64 | nsCOMPtr<nsISelection> mSelection; |
| michael@0 | 65 | nsRefPtr<nsRange> mFirstSelectedRange; |
| michael@0 | 66 | nsCOMPtr<nsIContent> mRootContent; |
| michael@0 | 67 | |
| michael@0 | 68 | nsresult Init(WidgetQueryContentEvent* aEvent); |
| michael@0 | 69 | nsresult Init(WidgetSelectionEvent* aEvent); |
| michael@0 | 70 | |
| michael@0 | 71 | nsresult InitBasic(); |
| michael@0 | 72 | nsresult InitCommon(); |
| michael@0 | 73 | |
| michael@0 | 74 | public: |
| michael@0 | 75 | // FlatText means the text that is generated from DOM tree. The BR elements |
| michael@0 | 76 | // are replaced to native linefeeds. Other elements are ignored. |
| michael@0 | 77 | |
| michael@0 | 78 | // Get the offset in FlatText of the range. (also used by IMEContentObserver) |
| michael@0 | 79 | static nsresult GetFlatTextOffsetOfRange(nsIContent* aRootContent, |
| michael@0 | 80 | nsINode* aNode, |
| michael@0 | 81 | int32_t aNodeOffset, |
| michael@0 | 82 | uint32_t* aOffset, |
| michael@0 | 83 | LineBreakType aLineBreakType); |
| michael@0 | 84 | static nsresult GetFlatTextOffsetOfRange(nsIContent* aRootContent, |
| michael@0 | 85 | nsRange* aRange, |
| michael@0 | 86 | uint32_t* aOffset, |
| michael@0 | 87 | LineBreakType aLineBreakType); |
| michael@0 | 88 | // Get the native text length of a content node excluding any children |
| michael@0 | 89 | static uint32_t GetNativeTextLength(nsIContent* aContent, |
| michael@0 | 90 | uint32_t aMaxLength = UINT32_MAX); |
| michael@0 | 91 | protected: |
| michael@0 | 92 | static uint32_t GetTextLength(nsIContent* aContent, |
| michael@0 | 93 | LineBreakType aLineBreakType, |
| michael@0 | 94 | uint32_t aMaxLength = UINT32_MAX); |
| michael@0 | 95 | static LineBreakType GetLineBreakType(WidgetQueryContentEvent* aEvent); |
| michael@0 | 96 | static LineBreakType GetLineBreakType(WidgetSelectionEvent* aEvent); |
| michael@0 | 97 | static LineBreakType GetLineBreakType(bool aUseNativeLineBreak); |
| michael@0 | 98 | // Returns focused content (including its descendant documents). |
| michael@0 | 99 | nsIContent* GetFocusedContent(); |
| michael@0 | 100 | // Returns true if the content is a plugin host. |
| michael@0 | 101 | bool IsPlugin(nsIContent* aContent); |
| michael@0 | 102 | // QueryContentRect() sets the rect of aContent's frame(s) to aEvent. |
| michael@0 | 103 | nsresult QueryContentRect(nsIContent* aContent, |
| michael@0 | 104 | WidgetQueryContentEvent* aEvent); |
| michael@0 | 105 | // Make the DOM range from the offset of FlatText and the text length. |
| michael@0 | 106 | // If aExpandToClusterBoundaries is true, the start offset and the end one are |
| michael@0 | 107 | // expanded to nearest cluster boundaries. |
| michael@0 | 108 | nsresult SetRangeFromFlatTextOffset(nsRange* aRange, |
| michael@0 | 109 | uint32_t aOffset, |
| michael@0 | 110 | uint32_t aLength, |
| michael@0 | 111 | LineBreakType aLineBreakType, |
| michael@0 | 112 | bool aExpandToClusterBoundaries, |
| michael@0 | 113 | uint32_t* aNewOffset = nullptr); |
| michael@0 | 114 | // Find the first textframe for the range, and get the start offset in |
| michael@0 | 115 | // the frame. |
| michael@0 | 116 | nsresult GetStartFrameAndOffset(nsRange* aRange, |
| michael@0 | 117 | nsIFrame** aFrame, |
| michael@0 | 118 | int32_t* aOffsetInFrame); |
| michael@0 | 119 | // Convert the frame relative offset to the root view relative offset. |
| michael@0 | 120 | nsresult ConvertToRootViewRelativeOffset(nsIFrame* aFrame, |
| michael@0 | 121 | nsRect& aRect); |
| michael@0 | 122 | // Expand aXPOffset to the nearest offset in cluster boundary. aForward is |
| michael@0 | 123 | // true, it is expanded to forward. |
| michael@0 | 124 | nsresult ExpandToClusterBoundary(nsIContent* aContent, bool aForward, |
| michael@0 | 125 | uint32_t* aXPOffset); |
| michael@0 | 126 | }; |
| michael@0 | 127 | |
| michael@0 | 128 | } // namespace mozilla |
| michael@0 | 129 | |
| michael@0 | 130 | #endif // mozilla_ContentEventHandler_h_ |
