字体预览工具 v1.0.0 初始版本

2026-09-19 23:50:45 +08:00
commit 1883e9ba77
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+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+
+namespace FontPreview
+{
+	/// <summary>
+	/// 缺字检测对话框：选一款已加载字体，输入测试文本，
+	/// 用 cmap 表判断哪些字符该字体没有字形。
+	/// </summary>
+	public class GlyphCoverageDialog : Form
+	{
+		private List<FontItem> items;
+		private ComboBox cboFont;
+		private TextBox txtTest;
+		private TextBox txtResult;
+		private Label lblStat;
+
+		public GlyphCoverageDialog(List<FontItem> items)
+		{
+			this.items = items;
+			Text = "缺字检测";
+			FormBorderStyle = FormBorderStyle.SizableToolWindow;
+			StartPosition = FormStartPosition.CenterParent;
+			ClientSize = new Size(560, 460);
+			Font = new Font("Microsoft YaHei UI", 9f);
+			MinimumSize = new Size(480, 400);
+
+			Label l1 = new Label { Text = "字体：", Location = new Point(12, 15), Size = new Size(40, 20) };
+			cboFont = new ComboBox { DropDownStyle = ComboBoxStyle.DropDownList, Location = new Point(56, 12), Size = new Size(480, 24) };
+			foreach (FontItem it in items)
+			{
+				cboFont.Items.Add(it.DisplayName + "  ——  " + it.Name);
+			}
+			if (cboFont.Items.Count > 0) cboFont.SelectedIndex = 0;
+
+			Label l2 = new Label { Text = "测试文字（逐字检查是否缺字）：", Location = new Point(12, 48), Size = new Size(300, 20) };
+			txtTest = new TextBox
+			{
+				Multiline = true,
+				ScrollBars = ScrollBars.Vertical,
+				Location = new Point(12, 72),
+				Size = new Size(524, 110),
+				Text = SampleTexts.All[0].Text
+			};
+
+			Button btnGo = new Button { Text = "开始检测", Location = new Point(12, 190), Size = new Size(100, 28) };
+			btnGo.Click += OnGo;
+
+			lblStat = new Label { Text = "选择字体后点击“开始检测”", Location = new Point(122, 195), Size = new Size(414, 20) };
+
+			txtResult = new TextBox
+			{
+				Multiline = true,
+				ReadOnly = true,
+				ScrollBars = ScrollBars.Vertical,
+				Location = new Point(12, 226),
+				Size = new Size(524, 222),
+				BackColor = Color.White,
+				Font = new Font("Microsoft YaHei UI", 10f)
+			};
+
+			Controls.Add(l1); Controls.Add(cboFont);
+			Controls.Add(l2); Controls.Add(txtTest);
+			Controls.Add(btnGo); Controls.Add(lblStat);
+			Controls.Add(txtResult);
+		}
+
+		private void OnGo(object sender, EventArgs e)
+		{
+			if (cboFont.SelectedIndex < 0) { lblStat.Text = "请先选择字体"; return; }
+			FontItem it = items[cboFont.SelectedIndex];
+			FontCmap cmap = FontCmap.Load(it.Path);
+			if (cmap == null)
+			{
+				lblStat.Text = "无法解析该字体（可能不是 TTF/OTF）";
+				txtResult.Text = "";
+				return;
+			}
+
+			string test = txtTest.Text ?? "";
+			HashSet<int> seen = new HashSet<int>();
+			List<string> missing = new List<string>();
+			int total = 0;
+			// 按 UTF-32 码点遍历，正确处理 emoji/代理对，避免孤立高代理项报错
+			for (int i = 0; i < test.Length; i++)
+			{
+				char ch = test[i];
+				if (char.IsWhiteSpace(ch) || char.IsPunctuation(ch)) continue;
+				int cp;
+				string chStr;
+				if (char.IsHighSurrogate(ch) && i + 1 < test.Length && char.IsLowSurrogate(test[i + 1]))
+				{
+					cp = char.ConvertToUtf32(ch, test[i + 1]);
+					chStr = new string(new char[] { ch, test[i + 1] });
+					i++;
+				}
+				else if (char.IsSurrogate(ch))
+				{
+					continue; // 孤立代理项，跳过
+				}
+				else
+				{
+					cp = ch;
+					chStr = ch.ToString();
+				}
+				if (!seen.Add(cp)) continue;
+				total++;
+				if (!cmap.HasGlyph(cp))
+				{
+					missing.Add(chStr);
+				}
+			}
+
+			int cover = total - missing.Count;
+			lblStat.Text = string.Format("共检查 {0} 个不同字符，覆盖 {1}，缺字 {2} 个", total, cover, missing.Count);
+			if (missing.Count == 0)
+			{
+				txtResult.Text = "✓ 该字体覆盖测试文本中的全部字符，无缺字。";
+			}
+			else
+			{
+				StringBuilder sb = new StringBuilder();
+				sb.AppendLine("以下字符该字体缺字（无字形）：");
+				sb.AppendLine();
+				sb.AppendLine(string.Join("  ", missing));
+				sb.AppendLine();
+				sb.AppendLine("建议：换字体或减少这些用字。");
+				txtResult.Text = sb.ToString();
+			}
+		}
+	}
+}