Remove outdated toc_pages.txt, add new Go modules for IHK Chemnitz PDF rendering including diagrams, tables, and TOC functionality.

pdf_toc.go

@@ -0,0 +1,167 @@
+package main
+
+import "strconv"
+
+// TOCItem is one entry in the Inhaltsverzeichnis.
+type TOCItem struct {
+	Level   int
+	Title   string
+	PageStr string // formatted page number (Roman or Arabic)
+}
+
+// TableItem is one entry in the Tabellenverzeichnis.
+type TableItem struct {
+	Title   string
+	PageStr string
+}
+
+// FigureItem is one entry in the Abbildungsverzeichnis.
+type FigureItem struct {
+	Title   string
+	PageStr string
+}
+
+// dirEntry is the internal representation used by renderDirEntries.
+type dirEntry struct {
+	indent  int    // indentation level (0 = none)
+	title   string // translated title text
+	pageStr string // page number string
+}
+
+// RecordHeader adds a heading to the TOC with the appropriate page number.
+// Front-matter headings use Roman numerals; main-body headings use Arabic.
+// Headings on the title page (NumNone) are not recorded.
+func (r *IHKRenderer) RecordHeader(level int, title string) {
+	var pageStr string
+	switch r.numType {
+	case NumRoman:
+		pageStr = toRoman(r.pdf.PageNo())
+	case NumArabic:
+		dp := r.pdf.PageNo() - r.pageOffset
+		if dp <= 0 {
+			dp = 1
+		}
+		pageStr = strconv.Itoa(dp)
+	default:
+		return
+	}
+	r.tocItems = append(r.tocItems, TOCItem{Level: level, Title: title, PageStr: pageStr})
+}
+
+// RecordTable adds an entry to the Tabellenverzeichnis.
+func (r *IHKRenderer) RecordTable(title string) {
+	dp := r.pdf.PageNo() - r.pageOffset
+	if dp <= 0 {
+		dp = 1
+	}
+	r.tableItems = append(r.tableItems, TableItem{Title: title, PageStr: strconv.Itoa(dp)})
+}
+
+// RecordFigure adds an entry to the Abbildungsverzeichnis.
+func (r *IHKRenderer) RecordFigure(title string) {
+	dp := r.pdf.PageNo() - r.pageOffset
+	if dp <= 0 {
+		dp = 1
+	}
+	r.figureItems = append(r.figureItems, FigureItem{Title: title, PageStr: strconv.Itoa(dp)})
+}
+
+// RenderTOC renders the Inhaltsverzeichnis on a new Roman-numbered page.
+// In pass 1 the list is empty (no tocItems yet); pass 2 fills it in.
+// Note: if the TOC spans more pages than in pass 1, subsequent page numbers
+// will be off by the difference — an inherent two-pass limitation.
+func (r *IHKRenderer) RenderTOC() {
+	r.numType = NumRoman
+	r.pdf.AddPage()
+
+	r.pdf.SetFont("Helvetica", "B", dinFontHeading)
+	r.pdf.CellFormat(0, dinLineHtHeading+4, r.tr("Inhaltsverzeichnis"), "", 1, "L", false, 0, "")
+	r.pdf.Ln(dinSpaceAfterHeading)
+
+	if len(r.tocItems) == 0 {
+		return
+	}
+
+	// Column header row
+	uw := r.usableWidth()
+	r.pdf.SetFont("Helvetica", "B", dinFontBody)
+	r.pdf.CellFormat(uw-20, dinLineHtBody, r.tr("Inhalt"), "", 0, "L", false, 0, "")
+	r.pdf.CellFormat(20, dinLineHtBody, r.tr("Seite"), "", 1, "R", false, 0, "")
+	r.pdf.Ln(2)
+
+	entries := make([]dirEntry, len(r.tocItems))
+	for i, item := range r.tocItems {
+		entries[i] = dirEntry{
+			indent:  item.Level - 1,
+			title:   item.Title,
+			pageStr: item.PageStr,
+		}
+	}
+	r.renderDirEntries(entries)
+}
+
+// RenderListOfTables renders the Tabellenverzeichnis if any tables were recorded.
+func (r *IHKRenderer) RenderListOfTables() {
+	if len(r.tableItems) == 0 {
+		return
+	}
+	r.pdf.AddPage()
+	r.pdf.SetFont("Helvetica", "B", dinFontHeading)
+	r.pdf.CellFormat(0, dinLineHtHeading+4, r.tr("Tabellenverzeichnis"), "", 1, "L", false, 0, "")
+	r.pdf.Ln(dinSpaceAfterHeading)
+
+	entries := make([]dirEntry, len(r.tableItems))
+	for i, item := range r.tableItems {
+		entries[i] = dirEntry{indent: 0, title: item.Title, pageStr: item.PageStr}
+	}
+	r.renderDirEntries(entries)
+}
+
+// RenderListOfFigures renders the Abbildungsverzeichnis if any figures were recorded.
+func (r *IHKRenderer) RenderListOfFigures() {
+	if len(r.figureItems) == 0 {
+		return
+	}
+	r.pdf.AddPage()
+	r.pdf.SetFont("Helvetica", "B", dinFontHeading)
+	r.pdf.CellFormat(0, dinLineHtHeading+4, r.tr("Abbildungsverzeichnis"), "", 1, "L", false, 0, "")
+	r.pdf.Ln(dinSpaceAfterHeading)
+
+	entries := make([]dirEntry, len(r.figureItems))
+	for i, item := range r.figureItems {
+		entries[i] = dirEntry{indent: 0, title: item.Title, pageStr: item.PageStr}
+	}
+	r.renderDirEntries(entries)
+}
+
+// renderDirEntries renders a list of title/page entries with dot leaders,
+// per DIN 5008 Inhaltsverzeichnis layout.
+func (r *IHKRenderer) renderDirEntries(entries []dirEntry) {
+	uw := r.usableWidth()
+	lm, _, _, _ := r.pdf.GetMargins()
+	r.pdf.SetFont("Helvetica", "", dinFontBody)
+
+	for _, e := range entries {
+		indent := float64(e.indent * 8)
+		r.pdf.SetX(lm + indent)
+
+		title := r.tr(e.title)
+		pageStr := e.pageStr
+		tw := r.pdf.GetStringWidth(title)
+		pw := r.pdf.GetStringWidth(pageStr)
+		avail := uw - indent - tw - pw - 6
+
+		r.pdf.CellFormat(tw+2, dinLineHtBody, title, "", 0, "L", false, 0, "")
+		if avail > 0 {
+			dots := ""
+			dw := r.pdf.GetStringWidth(".")
+			if dw > 0 {
+				for float64(len([]rune(dots)))*dw < avail {
+					dots += "."
+				}
+			}
+			r.pdf.CellFormat(avail, dinLineHtBody, dots, "", 0, "L", false, 0, "")
+		}
+		r.pdf.CellFormat(pw+4, dinLineHtBody, pageStr, "", 1, "R", false, 0, "")
+	}
+}