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f5a4a93787
It seems that setTraversalBefore doesn't work as well as setTraversalAfter for some reason, although I'm using them the same way. Some apps would lock up TalkBack when traversing if setTraversalBefore was set, but not with the equivalent setTraversalAfter. It's not entirely clear why this is, but I'm going with this to at least get it fixed for apps we know about. Addresses flutter/flutter#14600 See also flutter/flutter#14607
95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_LIB_UI_SEMANTICS_SEMANTICS_NODE_H_
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#define FLUTTER_LIB_UI_SEMANTICS_SEMANTICS_NODE_H_
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#include <stdint.h>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "third_party/skia/include/core/SkMatrix44.h"
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#include "third_party/skia/include/core/SkRect.h"
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namespace blink {
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// Must match the SemanticsAction enum in semantics.dart.
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enum class SemanticsAction : int32_t {
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kTap = 1 << 0,
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kLongPress = 1 << 1,
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kScrollLeft = 1 << 2,
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kScrollRight = 1 << 3,
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kScrollUp = 1 << 4,
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kScrollDown = 1 << 5,
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kIncrease = 1 << 6,
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kDecrease = 1 << 7,
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kShowOnScreen = 1 << 8,
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kMoveCursorForwardByCharacter = 1 << 9,
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kMoveCursorBackwardByCharacter = 1 << 10,
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kSetSelection = 1 << 11,
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kCopy = 1 << 12,
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kCut = 1 << 13,
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kPaste = 1 << 14,
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kDidGainAccessibilityFocus = 1 << 15,
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kDidLoseAccessibilityFocus = 1 << 16,
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};
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const int kScrollableSemanticsActions =
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static_cast<int32_t>(SemanticsAction::kScrollLeft) |
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static_cast<int32_t>(SemanticsAction::kScrollRight) |
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static_cast<int32_t>(SemanticsAction::kScrollUp) |
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static_cast<int32_t>(SemanticsAction::kScrollDown);
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// Must match the SemanticsFlags enum in semantics.dart.
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enum class SemanticsFlags : int32_t {
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kHasCheckedState = 1 << 0,
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kIsChecked = 1 << 1,
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kIsSelected = 1 << 2,
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kIsButton = 1 << 3,
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kIsTextField = 1 << 4,
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kIsFocused = 1 << 5,
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kHasEnabledState = 1 << 6,
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kIsEnabled = 1 << 7,
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};
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struct SemanticsNode {
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SemanticsNode();
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~SemanticsNode();
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bool HasAction(SemanticsAction action);
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bool HasFlag(SemanticsFlags flag);
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int32_t id = 0;
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int32_t flags = 0;
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int32_t actions = 0;
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int32_t textSelectionBase = -1;
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int32_t textSelectionExtent = -1;
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double scrollPosition = std::nan("");
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double scrollExtentMax = std::nan("");
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double scrollExtentMin = std::nan("");
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std::string label;
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std::string hint;
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std::string value;
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std::string increasedValue;
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std::string decreasedValue;
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int32_t textDirection = 0; // 0=unknown, 1=rtl, 2=ltr
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int32_t previousNodeId = -1;
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SkRect rect = SkRect::MakeEmpty();
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SkMatrix44 transform = SkMatrix44(SkMatrix44::kIdentity_Constructor);
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std::vector<int32_t> children;
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};
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// Contains semantic nodes that need to be updated.
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//
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// The keys in the map are stable node IDd, and the values contain
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// semantic information for the node corresponding to the ID.
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using SemanticsNodeUpdates = std::unordered_map<int32_t, SemanticsNode>;
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} // namespace blink
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#endif // FLUTTER_LIB_UI_SEMANTICS_SEMANTICS_NODE_H_
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