Add typst-latin-modern.md

content/typst-latin-modern.md

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++++
+title = "在 Typst 中使用 Latin Modern 家族"
+date = 2024-01-24
+[taxonomies]
+tags = ["typst", "typography"]
++++
+
+高德纳在开发 TeX 时，也设计了一套字体叫 Computer Modern，作为 TeX 的默认字体。然而当时字体是采用 METAFONT 制作的，和当今的字体标准 OpenType 并不兼容。Latin Modern 通过技术手段将 Computer Modern 转换到了 OpenType 格式，并且做了扩充和微调。所以我们在 Typst 中也可以调用 Latin Modern 字体。
+
+<!-- more -->
+
+下面是一个在 Typst 中使用 Latin Modern 字体的 demo，显示了 Latin Modern 字体家族的全部 72 种字体。
+
+[在这里查看](./lm.pdf)（[源码](./lm.typ)）
+
+今年 Typst 应该就要支持 HTML 导出功能，届时可以将 PDF 文件换成 HTML。

static/typst-latin-modern/lm.typ

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+#let sample-text = "Sample Text"
+
+#show table: box // Make it unbreakable
+
+#let xy-table(xtitle, xargs, ytitle, yargs, disable: (), additional: ()) = {
+  table(columns: xtitle.len() + 1,
+    ..xtitle
+      .enumerate()
+      .map(((i, text)) => table.cell(x: i + 1, y: 0, text)),
+    ..ytitle
+      .enumerate()
+      .map(((i, text)) => table.cell(x: 0, y: i + 1, text)),
+    ..for row in array.range(ytitle.len()) {
+      for col in array.range(xtitle.len()) {
+        if not disable.contains((row, col)) {
+          (table.cell(x: col + 1, y: row + 1,
+            text(..xargs.at(col), ..yargs.at(row), sample-text)),)
+        }
+      }
+    },
+    ..additional,
+  )
+}
+
+#let disable-list(matrix) = for row in array.range(matrix.len()) {
+  for col in array.range(matrix.at(row).len()) {
+    if matrix.at(row).at(col) == 0 {
+      ((row, col),)
+    }
+  }
+}
+
+#let family-opsz(style, sz) = {
+  let suffix = if sz == 10 { "" } else { " " + str(sz) }
+  "Latin Modern " + style + suffix
+}
+
+#align(center, text(font: "Latin Modern Roman 12", weight: "bold", size: 20pt)[The Latin Modern Families])
+
+#set text(font: "Latin Modern Mono", size: 10pt)
+
+= Latin Modern Mono (20 fonts)
+
+== Optical Size
+
+#table(columns: (auto, auto),
+  ..for opsz in (8, 9, 10, 12) {
+    (str(opsz) + "pt", text(font: family-opsz("Mono", opsz), size: opsz * 1pt, sample-text))
+  }
+)
+
+== Italic
+
+#text(style: "italic", sample-text)
+
+== Other Styles
+
+#let repeat(elem, times) = {
+  for _ in array.range(times) {
+    (elem,)
+  }
+}
+
+#let mono-table = xy-table(
+  ([Light], [Regular], [Bold]),
+  ((weight: 300), (), (weight: 700)),
+  ([Normal], [Cond], [Caps], [Prop]),
+  (
+    (),
+    (stretch: 65%),
+    (font: "Latin Modern Mono Caps"),
+    (font: "Latin Modern Mono Prop")
+  ),
+  disable: ((1, 1), (1, 2), (2, 0), (2, 2))
+)
+
+=== Upright
+
+#mono-table
+
+=== Oblique
+
+#{
+  set text(style: "oblique")
+  mono-table
+}
+
+#pagebreak()
+#set text(font: "Latin Modern Roman")
+
+= Latin Modern Roman (34 fonts)
+
+== Optical Size, Italic, and Bold
+
+#{
+  let matrix = (
+    (1, 0, 0, 1, 0, 0),
+    (1, 0, 0, 1, 0, 0),
+    (1, 1, 0, 1, 0, 0),
+    (1, 1, 1, 1, 0, 0),
+    (1, 1, 1, 1, 0, 0),
+    (1, 1, 1, 1, 1, 1),
+    (1, 1, 1, 1, 0, 0),
+    (1, 0, 1, 0, 0, 0),
+  )
+  let opsz-list = (5, 6, 7, 8, 9, 10, 12, 17)
+  xy-table(
+    ([Normal], [Italic], [Slanted], [Bold], [Bold Italic], [Bold Slanted]),
+    (
+      (), (style: "italic"), (style: "oblique"),
+      (weight: "bold"), (weight: "bold", style: "italic"), (weight: "bold", style: "oblique")
+    ),
+    opsz-list.map(sz => str(sz) + "pt"),
+    opsz-list.map(sz => (font: family-opsz("Roman", sz), size: sz * 1pt)),
+    disable: disable-list(matrix),
+    additional: (table.cell(x: 0, y: 0, [opsz]),)
+  )
+}
+
+== Other Styles
+
+#xy-table(
+  ([Normal], [Oblique]),
+  ((), (style: "oblique")),
+  ([Caps], [Demi], [Dunhill], [Unslanted]),
+  (
+    (font: "Latin Modern Roman Caps"),
+    (weight: 600),
+    (font: "Latin Modern Roman Dunhill"),
+    (font: "Latin Modern Roman Unslanted")
+  ),
+  disable: ((3, 1),)
+)
+
+#pagebreak()
+#set text(font: "Latin Modern Sans")
+
+= Latin Modern Sans (18 fonts)
+
+== Optical Size, Bold
+
+#{
+  let opsz-list = (8, 9, 10, 12, 17)
+  xy-table(
+    ([Normal], [Oblique]),
+    ((), (style: "oblique")),
+    opsz-list.map(sz => str(sz) + "pt"),
+    opsz-list.map(sz => (font: family-opsz("Sans", sz), size: sz * 1pt)),
+    additional: (table.cell(x: 0, y: 0, [opsz]),)
+  )
+}
+
+== Other Styles
+
+#xy-table(
+  ([Normal], [Oblique]),
+  ((), (style: "oblique")),
+  ([Bold], [Demi Cond], [Quotation], [Quotation Bold]),
+  (
+    (weight: "bold"),
+    (weight: "semibold"),
+    (font: "Latin Modern Sans Quotation"),
+    (font: "Latin Modern Sans Quotation", weight: "bold")
+  ),
+)
+
+#pagebreak()
+#set text(font: "Latin Modern Serif")
+
+= How to use these variants in Typst
+
+== Optical Size
+
+The default optical size is 10pt.
+All optical sizes other than 10pt are available as separate font families.
+
+```typst
+#set text(font: original-family + " 12")
+```
+
+== Italic, Oblique(Slanted)
+
+```typst
+#set text(style: "italic")
+#set text(style: "oblique")
+```
+
+== Light, Demi, Bold
+
+```typst
+#set text(weight: "light")
+#set text(weight: "semibold")
+#set text(weight: "bold")
+```
+
+== Cond
+
+```typst
+#set text(stretch: 66%)
+```
+
+== Other Styles
+
+All other styles are available as separate font families.
+
+```typst
+#set text(font: original-family + " Caps") // For Mono and Roman
+#set text(font: "Latin Modern Mono Prop")
+#set text(font: "Latin Modern Roman Dunhill")
+#set text(font: "Latin Modern Roman Unslanted")
+#set text(font: "Latin Modern Sans Quotation")
+```