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