OuterDocAccessible.h (2731B)
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #ifndef MOZILLA_A11Y_OUTERDOCACCESSIBLE_H_ 7 #define MOZILLA_A11Y_OUTERDOCACCESSIBLE_H_ 8 9 #include "AccessibleWrap.h" 10 11 namespace mozilla { 12 13 namespace dom { 14 class BrowserBridgeChild; 15 } 16 17 namespace a11y { 18 class DocAccessibleParent; 19 20 /** 21 * Used for <browser>, <frame>, <iframe>, <page> or editor> elements. 22 * 23 * In these variable names, "outer" relates to the OuterDocAccessible as 24 * opposed to the DocAccessibleWrap which is "inner". The outer node is 25 * a something like tags listed above, whereas the inner node corresponds to 26 * the inner document root. 27 */ 28 29 class OuterDocAccessible final : public AccessibleWrap { 30 public: 31 OuterDocAccessible(nsIContent* aContent, DocAccessible* aDoc); 32 33 NS_INLINE_DECL_REFCOUNTING_INHERITED(OuterDocAccessible, AccessibleWrap) 34 35 DocAccessibleParent* RemoteChildDoc() const; 36 37 /** 38 * For iframes in a content process which will be rendered in another content 39 * process, tell the parent process about this OuterDocAccessible 40 * so it can link the trees together when the embedded document is added. 41 * Note that an OuterDocAccessible can be created before the 42 * BrowserBridgeChild or vice versa. Therefore, this must be conditionally 43 * called when either of these is created. 44 */ 45 void SendEmbedderAccessible(dom::BrowserBridgeChild* aBridge); 46 47 Maybe<nsMargin> GetCrossDocOffset() { return mCrossDocOffset; } 48 49 void SetCrossDocOffset(nsMargin aMargin) { mCrossDocOffset = Some(aMargin); } 50 51 // LocalAccessible 52 virtual void Shutdown() override; 53 virtual mozilla::a11y::role NativeRole() const override; 54 virtual LocalAccessible* LocalChildAtPoint( 55 int32_t aX, int32_t aY, EWhichChildAtPoint aWhichChild) override; 56 57 virtual bool InsertChildAt(uint32_t aIdx, LocalAccessible* aChild) override; 58 virtual bool RemoveChild(LocalAccessible* aAccessible) override; 59 virtual bool IsAcceptableChild(nsIContent* aEl) const override; 60 61 virtual uint32_t ChildCount() const override; 62 63 // Accessible 64 virtual Accessible* ChildAt(uint32_t aIndex) const override; 65 virtual Accessible* ChildAtPoint(int32_t aX, int32_t aY, 66 EWhichChildAtPoint aWhichChild) override; 67 68 protected: 69 virtual ~OuterDocAccessible() override; 70 Maybe<nsMargin> mCrossDocOffset; 71 }; 72 73 inline OuterDocAccessible* LocalAccessible::AsOuterDoc() { 74 return IsOuterDoc() ? static_cast<OuterDocAccessible*>(this) : nullptr; 75 } 76 77 } // namespace a11y 78 } // namespace mozilla 79 80 #endif