ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

book-hu/crossref.lua

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+-- crossref.lua — internal cross-reference links for the Hungarian edition.
+--
+-- Hungarian references put the number before the noun ("2-6. ábra",
+-- "2. fejezet"). This filter anchors chapter and figure targets and turns
+-- those textual references into clickable LaTeX links. It also recognizes
+-- the legacy English "Figure 2-6" caption form so older source revisions
+-- still build with working targets.
+
+local chapter = 0
+
+local function figure_label(n, m)
+  return "fig:" .. n .. "-" .. m
+end
+
+local function chapter_label(n)
+  return "chap:" .. n
+end
+
+local function figure_number(text)
+  local n, m = text:match("(%d+)%-(%d+)%.%s*Ábra")
+  if not n then
+    n, m = text:match("(%d+)%-(%d+)%.%s*ábra")
+  end
+  if not n then
+    n, m = text:match("[Ff]igure%s*(%d+)%-(%d+)")
+  end
+  return n, m
+end
+
+local function split_keyword(text, keyword)
+  local suffix = text:match("^" .. keyword .. "(.*)$")
+  if suffix == nil then return nil end
+  return suffix
+end
+
+return {
+  {
+    traverse = "topdown",
+
+    Header = function(el)
+      if el.level == 1 and not el.classes:includes("unnumbered") then
+        chapter = chapter + 1
+        el.content:insert(
+          pandoc.RawInline("latex", "\\label{" .. chapter_label(chapter) .. "}")
+        )
+      end
+      return el
+    end,
+
+    Figure = function(el)
+      local n, m = figure_number(pandoc.utils.stringify(el.caption.long))
+      if n and m then
+        el.identifier = figure_label(n, m)
+      end
+      return el, false
+    end,
+
+    Image = function(el)
+      local n, m = figure_number(pandoc.utils.stringify(el.caption))
+      if n and m and el.identifier == "" then
+        el.identifier = figure_label(n, m)
+      end
+      return el, false
+    end,
+
+    Inlines = function(inlines)
+      local output = pandoc.Inlines{}
+      local i = 1
+      local changed = false
+
+      while i <= #inlines do
+        local number = inlines[i]
+        local space = inlines[i + 1]
+        local word = inlines[i + 2]
+        local linked = false
+
+        if number and number.t == "Str"
+            and space and space.t == "Space"
+            and word and word.t == "Str" then
+          local n, m, number_suffix =
+            number.text:match("^(%d+)%-(%d+)%.(.*)$")
+          local word_suffix = split_keyword(word.text, "Ábra")
+          if word_suffix == nil then
+            word_suffix = split_keyword(word.text, "ábra")
+          end
+
+          if n and m and number_suffix == "" and word_suffix ~= nil then
+            output:insert(pandoc.RawInline(
+              "latex",
+              "\\crossreflink{" .. figure_label(n, m) .. "}{" ..
+                n .. "-" .. m .. ". ábra}"
+            ))
+            if word_suffix ~= "" then
+              output:insert(pandoc.Str(word_suffix))
+            end
+            linked = true
+          else
+            n, number_suffix = number.text:match("^(%d+)%.(.*)$")
+            word_suffix = split_keyword(word.text, "[Ff]ejezet")
+            if n and number_suffix == "" and word_suffix ~= nil then
+              output:insert(pandoc.RawInline(
+                "latex",
+                "\\crossreflink{" .. chapter_label(n) .. "}{" ..
+                  n .. ". fejezet}"
+              ))
+              if word_suffix ~= "" then
+                output:insert(pandoc.Str(word_suffix))
+              end
+              linked = true
+            end
+          end
+        end
+
+        if linked then
+          i = i + 3
+          changed = true
+        else
+          output:insert(inlines[i])
+          i = i + 1
+        end
+      end
+
+      if changed then return output end
+    end,
+  }
+}