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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.ComponentModel; |
| 4 | +using System.Reflection; |
| 5 | +using System.Windows.Forms; |
| 6 | + |
| 7 | +namespace Crystallography.Controls; |
| 8 | + |
| 9 | +/// <summary> |
| 10 | +/// (260323Ch) Form / UserControl / Control / ToolStripItem に設計時の Capture フラグを付与する extender component。 |
| 11 | +/// </summary> |
| 12 | +[ProvideProperty("Capture", typeof(Component))] |
| 13 | +[DesignerCategory("Component")] |
| 14 | +[ToolboxItem(true)] |
| 15 | +public sealed class CaptureExtender : Component, IExtenderProvider |
| 16 | +{ |
| 17 | + private readonly Dictionary<Component, bool> captureTargets = new(); |
| 18 | + |
| 19 | + public CaptureExtender() |
| 20 | + { |
| 21 | + } |
| 22 | + |
| 23 | + public CaptureExtender(IContainer container) |
| 24 | + : this() |
| 25 | + { |
| 26 | + container?.Add(this); // (260323Ch) designer から components コンテナ付きで生成できるようにする |
| 27 | + } |
| 28 | + |
| 29 | + public bool CanExtend(object extendee) |
| 30 | + { |
| 31 | + return extendee is Control or ToolStripItem && !ReferenceEquals(extendee, this); |
| 32 | + } |
| 33 | + |
| 34 | + [Category("Behavior")] |
| 35 | + [DefaultValue(false)] |
| 36 | + [Description("FormCaptureGUI で個別キャプチャ対象に含めるかどうかを指定します。")] |
| 37 | + public bool GetCapture(Component extendee) |
| 38 | + { |
| 39 | + return extendee != null |
| 40 | + && captureTargets.TryGetValue(extendee, out var capture) |
| 41 | + && capture; |
| 42 | + } |
| 43 | + |
| 44 | + public void SetCapture(Component extendee, bool value) |
| 45 | + { |
| 46 | + if (extendee == null || !CanExtend(extendee)) |
| 47 | + return; |
| 48 | + |
| 49 | + // captureTargets[extendee] = value; // 旧実装案: false も辞書に保持する |
| 50 | + if (value) |
| 51 | + { |
| 52 | + captureTargets[extendee] = true; // (260323Ch) デフォルト false なので true のみ保持して designer serialize を簡潔にする |
| 53 | + extendee.Disposed -= Extendee_Disposed; |
| 54 | + extendee.Disposed += Extendee_Disposed; |
| 55 | + } |
| 56 | + else if (captureTargets.Remove(extendee)) |
| 57 | + { |
| 58 | + extendee.Disposed -= Extendee_Disposed; |
| 59 | + } |
| 60 | + } |
| 61 | + |
| 62 | + public bool ShouldSerializeCapture(Component extendee) => GetCapture(extendee); |
| 63 | + |
| 64 | + public void ResetCapture(Component extendee) => SetCapture(extendee, false); |
| 65 | + |
| 66 | + private void Extendee_Disposed(object sender, EventArgs e) |
| 67 | + { |
| 68 | + if (sender is Component extendee) |
| 69 | + { |
| 70 | + extendee.Disposed -= Extendee_Disposed; |
| 71 | + captureTargets.Remove(extendee); |
| 72 | + } |
| 73 | + } |
| 74 | + |
| 75 | + internal bool HasCaptureTargets() => captureTargets.Count > 0; |
| 76 | + |
| 77 | + internal static bool IsCaptureEnabled(Component extendee) |
| 78 | + { |
| 79 | + foreach (var extender in EnumerateCandidateExtenders(extendee)) |
| 80 | + { |
| 81 | + if (extender.GetCapture(extendee)) |
| 82 | + return true; |
| 83 | + } |
| 84 | + return false; |
| 85 | + } |
| 86 | + |
| 87 | + internal static bool HasAnyCaptureTargets(Control root) |
| 88 | + { |
| 89 | + if (root == null) return false; |
| 90 | + |
| 91 | + var visitedContainers = new HashSet<object>(); |
| 92 | + foreach (var container in EnumerateVisualContainers(root)) |
| 93 | + { |
| 94 | + if (!visitedContainers.Add(container)) continue; |
| 95 | + |
| 96 | + foreach (var extender in GetExtenders(container)) |
| 97 | + { |
| 98 | + if (extender.HasCaptureTargets()) |
| 99 | + return true; |
| 100 | + } |
| 101 | + } |
| 102 | + return false; |
| 103 | + } |
| 104 | + |
| 105 | + private static IEnumerable<object> EnumerateVisualContainers(Control root) |
| 106 | + { |
| 107 | + yield return root; |
| 108 | + |
| 109 | + foreach (Control child in root.Controls) |
| 110 | + { |
| 111 | + foreach (var descendant in EnumerateVisualContainers(child)) |
| 112 | + yield return descendant; |
| 113 | + } |
| 114 | + |
| 115 | + if (root is ToolStripContainer toolStripContainer) |
| 116 | + { |
| 117 | + foreach (var panel in new Control[] |
| 118 | + { |
| 119 | + toolStripContainer.TopToolStripPanel, |
| 120 | + toolStripContainer.BottomToolStripPanel, |
| 121 | + toolStripContainer.LeftToolStripPanel, |
| 122 | + toolStripContainer.RightToolStripPanel, |
| 123 | + toolStripContainer.ContentPanel |
| 124 | + }) |
| 125 | + { |
| 126 | + foreach (var descendant in EnumerateVisualContainers(panel)) |
| 127 | + yield return descendant; |
| 128 | + } |
| 129 | + } |
| 130 | + |
| 131 | + if (root is SplitContainer splitContainer) |
| 132 | + { |
| 133 | + foreach (var panel in new Control[] { splitContainer.Panel1, splitContainer.Panel2 }) |
| 134 | + { |
| 135 | + foreach (var descendant in EnumerateVisualContainers(panel)) |
| 136 | + yield return descendant; |
| 137 | + } |
| 138 | + } |
| 139 | + } |
| 140 | + |
| 141 | + private static IEnumerable<CaptureExtender> EnumerateCandidateExtenders(Component extendee) |
| 142 | + { |
| 143 | + var visitedContainers = new HashSet<object>(); |
| 144 | + |
| 145 | + foreach (var container in EnumerateOwningContainers(extendee)) |
| 146 | + { |
| 147 | + if (!visitedContainers.Add(container)) continue; |
| 148 | + |
| 149 | + foreach (var extender in GetExtenders(container)) |
| 150 | + yield return extender; |
| 151 | + } |
| 152 | + } |
| 153 | + |
| 154 | + private static IEnumerable<object> EnumerateOwningContainers(Component extendee) |
| 155 | + { |
| 156 | + var stack = new Stack<object>(); |
| 157 | + var visited = new HashSet<object>(); |
| 158 | + stack.Push(extendee); |
| 159 | + |
| 160 | + while (stack.Count > 0) |
| 161 | + { |
| 162 | + var current = stack.Pop(); |
| 163 | + if (!visited.Add(current)) continue; |
| 164 | + |
| 165 | + yield return current; |
| 166 | + |
| 167 | + switch (current) |
| 168 | + { |
| 169 | + case ToolStripItem item: |
| 170 | + if (item.OwnerItem != null) stack.Push(item.OwnerItem); |
| 171 | + if (item.Owner != null) stack.Push(item.Owner); |
| 172 | + break; |
| 173 | + |
| 174 | + case Control control when control.Parent != null: |
| 175 | + stack.Push(control.Parent); |
| 176 | + break; |
| 177 | + } |
| 178 | + } |
| 179 | + } |
| 180 | + |
| 181 | + private static IEnumerable<CaptureExtender> GetExtenders(object container) |
| 182 | + { |
| 183 | + var visitedExtenders = new HashSet<CaptureExtender>(); |
| 184 | + for (var type = container.GetType(); type != null; type = type.BaseType) |
| 185 | + { |
| 186 | + foreach (var field in type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly)) |
| 187 | + { |
| 188 | + if (field.FieldType == typeof(CaptureExtender) && field.GetValue(container) is CaptureExtender extender && visitedExtenders.Add(extender)) |
| 189 | + yield return extender; // (260323Ch) base Form / base UserControl に置いた CaptureExtender も拾えるようにする |
| 190 | + } |
| 191 | + } |
| 192 | + } |
| 193 | +} |
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