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feat: Implement
RichTextBlockOverflowAutomationPeer
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src/Uno.UI/UI/Xaml/Automation/Peers/RichTextBlockOverflowAutomationPeer.cs
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| // Copyright (c) Microsoft Corporation. All rights reserved. | ||
| // Licensed under the MIT License. See LICENSE in the project root for license information. | ||
| // MUX Reference RichTextBlockOverflowAutomationPeer_Partial.cpp, tag winui3/release/1.4.2 | ||
| using System.Collections.Generic; | ||
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| namespace Microsoft.UI.Xaml.Automation.Peers; | ||
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| /// <summary> | ||
| /// Exposes RichTextBlockOverflow types to Microsoft UI Automation. | ||
| /// </summary> | ||
| public partial class RichTextBlockOverflowAutomationPeer : FrameworkElementAutomationPeer | ||
| { | ||
| public RichTextBlockOverflowAutomationPeer(Controls.RichTextBlockOverflow owner) : base(owner) | ||
| { | ||
| } | ||
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| protected override object GetPatternCore(PatternInterface patternInterface) | ||
| { | ||
| if (patternInterface == PatternInterface.Text) | ||
| { | ||
| //if (m_pTextPattern == nullptr) | ||
| //{ | ||
| // ctl::ComPtr<IUIElement> spOwner; | ||
| // ctl::ComPtr<TextAdapter> spTextAdapter; | ||
| // IFC(get_Owner(&spOwner)); | ||
| // IFCPTR(spOwner.Get()); | ||
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| // // RichTextBlockOverflows that don't have a master RichTextBlock don't have a text pattern, and should return nullptr. | ||
| // if (static_cast<CRichTextBlockOverflow*>((static_cast<RichTextBlockOverflow*>(spOwner.Get())->GetHandle()))->m_pMaster != nullptr) | ||
| // { | ||
| // IFC(ActivationAPI::ActivateAutomationInstance(KnownTypeIndex::TextAdapter, static_cast<RichTextBlockOverflow*>(spOwner.Get())->GetHandle(), spTextAdapter.GetAddressOf())); | ||
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| // IFCPTR(spTextAdapter.Get()); | ||
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| // m_pTextPattern = spTextAdapter.Detach(); | ||
| // IFC(m_pTextPattern->put_Owner(spOwner.Get())); | ||
| // } | ||
| //} | ||
| //*ppReturnValue = ctl::as_iinspectable((m_pTextPattern)); | ||
| //ctl::addref_interface(m_pTextPattern); | ||
| } | ||
| else | ||
| { | ||
| return base.GetPatternCore(patternInterface); | ||
| } | ||
| } | ||
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| protected override string GetClassNameCore() => nameof(Controls.RichTextBlockOverflow); | ||
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| protected override AutomationControlType GetAutomationControlTypeCore() | ||
| => AutomationControlType.Text; | ||
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| // We populate automation peer children from its block collection recursively | ||
| // Here we need to eliminate all text elements which are | ||
| // are present in the previous RichTextBlock/RichTextBlockOverflow | ||
| // overflowing to next RichTextOverflow if any | ||
| protected override IList<AutomationPeer> GetChildrenCore() | ||
| { | ||
| var owner = Owner as Controls.RichTextBlockOverflow; | ||
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| var posContentStart = 0; | ||
| var posOverflowStart = int.MaxValue; | ||
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| var returnValue = base.GetChildrenCore(); | ||
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| if (owner.ContentStart is { } contentStart) | ||
| { | ||
| posContentStart = contentStart.Offset; | ||
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| if (owner.HasOverflowContent) | ||
| { | ||
| if (owner.OverflowContentTarget?.ContentStart is { } spOverflowStart) | ||
| { | ||
| posOverflowStart = spOverflowStart.Offset; | ||
| } | ||
| } | ||
| } | ||
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| var spSourceControl = owner.ContentSource; | ||
| var spBlocks = spSourceControl.Blocks; | ||
| var count = spBlocks.Count; | ||
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| for (var i = 0; i < count; i++) | ||
| { | ||
| var spBlock = spBlocks[i]; | ||
| if (owner.HasOverflowContent) | ||
| { | ||
| var blockStart = spBlock.ContentStart; | ||
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| if (blockStart.Offset >= posOverflowStart) | ||
| { | ||
| break; | ||
| } | ||
| } | ||
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| //UNO TODO: AppendAutomationPeerChildren | ||
| returnValue = spBlock.AppendAutomationPeerChildren(posContentStart, posOverflowStart); | ||
| } | ||
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| return returnValue; | ||
| } | ||
| } |