mirror of
https://github.com/encounter/engine.git
synced 2026-03-30 11:09:55 -07:00
Kate Lovett
133 lines
3.8 KiB
C++
133 lines
3.8 KiB
C++
// Copyright 2013 The Flutter 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 flutter {
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// Must match the SemanticsAction enum in semantics.dart and in each of the
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// embedders.
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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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kCustomAction = 1 << 17,
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kDismiss = 1 << 18,
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kMoveCursorForwardByWordIndex = 1 << 19,
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kMoveCursorBackwardByWordIndex = 1 << 20,
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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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kIsInMutuallyExclusiveGroup = 1 << 8,
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kIsHeader = 1 << 9,
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kIsObscured = 1 << 10,
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kScopesRoute = 1 << 11,
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kNamesRoute = 1 << 12,
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kIsHidden = 1 << 13,
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kIsImage = 1 << 14,
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kIsLiveRegion = 1 << 15,
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kHasToggledState = 1 << 16,
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kIsToggled = 1 << 17,
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kHasImplicitScrolling = 1 << 18,
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// The Dart API defines the following flag but it isn't used in iOS.
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// kIsMultiline = 1 << 19,
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kIsReadOnly = 1 << 20,
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kIsFocusable = 1 << 21,
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kIsLink = 1 << 22,
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};
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const int kScrollableSemanticsFlags =
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static_cast<int32_t>(SemanticsFlags::kHasImplicitScrolling);
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struct SemanticsNode {
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SemanticsNode();
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SemanticsNode(const SemanticsNode& other);
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~SemanticsNode();
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bool HasAction(SemanticsAction action) const;
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bool HasFlag(SemanticsFlags flag) const;
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// Whether this node is for embedded platform views.
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bool IsPlatformViewNode() const;
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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 maxValueLength = -1;
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int32_t currentValueLength = -1;
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int32_t textSelectionBase = -1;
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int32_t textSelectionExtent = -1;
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int32_t platformViewId = -1;
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int32_t scrollChildren = 0;
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int32_t scrollIndex = 0;
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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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double elevation = 0.0;
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double thickness = 0.0;
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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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SkRect rect = SkRect::MakeEmpty();
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SkMatrix44 transform = SkMatrix44(SkMatrix44::kIdentity_Constructor);
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std::vector<int32_t> childrenInTraversalOrder;
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std::vector<int32_t> childrenInHitTestOrder;
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std::vector<int32_t> customAccessibilityActions;
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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 flutter
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#endif // FLUTTER_LIB_UI_SEMANTICS_SEMANTICS_NODE_H_
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