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authorJörg Frings-Fürst <debian@jff-webhosting.net>2016-12-28 16:52:56 +0100
committerJörg Frings-Fürst <debian@jff-webhosting.net>2016-12-28 16:52:56 +0100
commit7b358424ebad9349421acd533c2fa1cbf6cf3e3e (patch)
tree686678532eefed525c242fd214d0cfb2914726c5 /app/tools/halibut/bk_paper.c
Initial import of xtrkcad version 1:4.0.2-2
Diffstat (limited to 'app/tools/halibut/bk_paper.c')
-rw-r--r--app/tools/halibut/bk_paper.c2789
1 files changed, 2789 insertions, 0 deletions
diff --git a/app/tools/halibut/bk_paper.c b/app/tools/halibut/bk_paper.c
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+++ b/app/tools/halibut/bk_paper.c
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+/*
+ * Paper printing pre-backend for Halibut.
+ *
+ * This module does all the processing common to both PostScript
+ * and PDF output: selecting fonts, line wrapping and page breaking
+ * in accordance with font metrics, laying out the contents and
+ * index pages, generally doing all the page layout. After this,
+ * bk_ps.c and bk_pdf.c should only need to do linear translations
+ * into their literal output format.
+ */
+
+/*
+ * TODO in future work:
+ *
+ * - linearised PDF, perhaps?
+ *
+ * - I'm uncertain of whether I need to include a ToUnicode CMap
+ * in each of my font definitions in PDF. Currently things (by
+ * which I mean cut and paste out of acroread) seem to be
+ * working fairly happily without it, but I don't know.
+ *
+ * - rather than the ugly aux_text mechanism for rendering chapter
+ * titles, we could actually build the correct word list and
+ * wrap it as a whole.
+ *
+ * - get vertical font metrics and use them to position the PDF
+ * xref boxes more pleasantly
+ *
+ * - configurability
+ * * page header and footer should be configurable; we should
+ * be able to shift the page number elsewhere, and add other
+ * things such as the current chapter/section title and fixed
+ * text
+ * * remove the fixed mapping from heading levels to heading
+ * styles; offer a menu of styles from which the user can
+ * choose at every heading level
+ * * first-line indent in paragraphs
+ * * fixed text: `Contents', `Index', the colon-space and full
+ * stop in chapter title constructions
+ * * configurable location of contents?
+ * * certainly configurably _remove_ the contents, and possibly
+ * also the index
+ * * double-sided document switch?
+ * + means you have two header/footer formats which
+ * alternate
+ * + and means that mandatory page breaks before chapter
+ * titles should include a blank page if necessary to
+ * start the next section to a right-hand page
+ *
+ * - title pages
+ *
+ * - ability to use Type 1 fonts without AFM files
+ * * we need to parse the font to extract its metrics
+ *
+ * - character substitution for better typography?
+ * * use real ellipsis rather than ...
+ * * a hyphen in a word by itself might prefer to be an en-dash
+ * * (Americans might even want a convenient way to use an
+ * em-dash)
+ * * DON'T DO ANY OF THE ABOVE WITHIN \c OR \cw!
+ * * substituting `minus' for `hyphen' in the standard encoding
+ * is probably preferable in Courier, though certainly not in
+ * the main text font
+ * * if I do do this lot, I'm rather inclined to at least try
+ * to think up a configurable way to do it so that Americans
+ * can do em-dash tricks without my intervention and other
+ * people can do other odd things too.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "halibut.h"
+#include "paper.h"
+
+typedef struct paper_conf_Tag paper_conf;
+typedef struct paper_idx_Tag paper_idx;
+
+typedef struct {
+ font_data *fonts[NFONTS];
+ int font_size;
+} font_cfg;
+
+struct paper_conf_Tag {
+ int paper_width;
+ int paper_height;
+ int left_margin;
+ int top_margin;
+ int right_margin;
+ int bottom_margin;
+ int indent_list_bullet;
+ int indent_list_after;
+ int indent_list;
+ int indent_quote;
+ int base_leading;
+ int base_para_spacing;
+ int chapter_top_space;
+ int sect_num_left_space;
+ int chapter_underline_depth;
+ int chapter_underline_thickness;
+ int rule_thickness;
+ font_cfg fbase, fcode, ftitle, fchapter, *fsect;
+ int nfsect;
+ int contents_indent_step;
+ int contents_margin;
+ int leader_separation;
+ int index_gutter;
+ int index_cols;
+ int index_minsep;
+ int pagenum_fontsize;
+ int footer_distance;
+ wchar_t *lquote, *rquote, *bullet;
+ wchar_t *contents_text, *index_text;
+ /* These are derived from the above */
+ int base_width;
+ int page_height;
+ int index_colwidth;
+};
+
+struct paper_idx_Tag {
+ /*
+ * Word list giving the page numbers on which this index entry
+ * appears. Also the last word in the list, for ease of
+ * construction.
+ */
+ word *words;
+ word *lastword;
+ /*
+ * The last page added to the list (so we can ensure we don't
+ * add one twice).
+ */
+ page_data *lastpage;
+};
+
+enum {
+ word_PageXref = word_NotWordType + 1
+};
+
+/* Flags for render_string() */
+#define RS_NOLIG 1
+
+static font_data *make_std_font(font_list *fontlist, char const *name);
+static void wrap_paragraph(para_data *pdata, word *words,
+ int w, int i1, int i2, paper_conf *conf);
+static page_data *page_breaks(line_data *first, line_data *last,
+ int page_height, int ncols, int headspace);
+static int render_string(page_data *page, font_data *font, int fontsize,
+ int x, int y, wchar_t *str, unsigned flags);
+static int render_line(line_data *ldata, int left_x, int top_y,
+ xref_dest *dest, keywordlist *keywords, indexdata *idx,
+ paper_conf *conf);
+static void render_para(para_data *pdata, paper_conf *conf,
+ keywordlist *keywords, indexdata *idx,
+ paragraph *index_placeholder, page_data *index_page);
+static int string_width(font_data *font, wchar_t const *string, int *errs,
+ unsigned flags);
+static int paper_width_simple(para_data *pdata, word *text, paper_conf *conf);
+static para_data *code_paragraph(int indent, word *words, paper_conf *conf);
+static para_data *rule_paragraph(int indent, paper_conf *conf);
+static void add_rect_to_page(page_data *page, int x, int y, int w, int h);
+static para_data *make_para_data(int ptype, int paux, int indent, int rmargin,
+ word *pkwtext, word *pkwtext2, word *pwords,
+ paper_conf *conf);
+static void standard_line_spacing(para_data *pdata, paper_conf *conf);
+static wchar_t *prepare_outline_title(word *first, wchar_t *separator,
+ word *second);
+static word *fake_word(wchar_t *text);
+static word *fake_space_word(void);
+static word *fake_page_ref(page_data *page);
+static word *fake_end_ref(void);
+static word *prepare_contents_title(word *first, wchar_t *separator,
+ word *second);
+static void fold_into_page(page_data *dest, page_data *src, int right_shift);
+
+static int fonts_ok(wchar_t *string, ...)
+{
+ font_data *font;
+ va_list ap;
+ int ret = TRUE;
+
+ va_start(ap, string);
+ while ( (font = va_arg(ap, font_data *)) != NULL) {
+ int errs;
+ (void) string_width(font, string, &errs, 0);
+ if (errs) {
+ ret = FALSE;
+ break;
+ }
+ }
+ va_end(ap);
+
+ return ret;
+}
+
+static void paper_cfg_fonts(font_data **fonts, font_list *fontlist,
+ wchar_t *wp, filepos *fpos) {
+ font_data *f;
+ char *fn;
+ int i;
+
+ for (i = 0; i < NFONTS && *wp; i++, wp = uadv(wp)) {
+ fn = utoa_dup(wp, CS_ASCII);
+ f = make_std_font(fontlist, fn);
+ if (f)
+ fonts[i] = f;
+ else
+ /* FIXME: proper error */
+ error(err_nofont, fpos, wp);
+ }
+}
+
+static paper_conf paper_configure(paragraph *source, font_list *fontlist) {
+ paragraph *p;
+ paper_conf ret;
+
+ /*
+ * Defaults.
+ */
+ ret.paper_width = 595 * UNITS_PER_PT;
+ ret.paper_height = 842 * UNITS_PER_PT;
+ ret.left_margin = 72 * UNITS_PER_PT;
+ ret.top_margin = 72 * UNITS_PER_PT;
+ ret.right_margin = 72 * UNITS_PER_PT;
+ ret.bottom_margin = 108 * UNITS_PER_PT;
+ ret.indent_list_bullet = 6 * UNITS_PER_PT;
+ ret.indent_list_after = 18 * UNITS_PER_PT;
+ ret.indent_quote = 18 * UNITS_PER_PT;
+ ret.base_leading = UNITS_PER_PT;
+ ret.base_para_spacing = 10 * UNITS_PER_PT;
+ ret.chapter_top_space = 72 * UNITS_PER_PT;
+ ret.sect_num_left_space = 12 * UNITS_PER_PT;
+ ret.chapter_underline_depth = 14 * UNITS_PER_PT;
+ ret.chapter_underline_thickness = 3 * UNITS_PER_PT;
+ ret.rule_thickness = 1 * UNITS_PER_PT;
+ ret.fbase.font_size = 12;
+ ret.fbase.fonts[FONT_NORMAL] = make_std_font(fontlist, "Times-Roman");
+ ret.fbase.fonts[FONT_EMPH] = make_std_font(fontlist, "Times-Italic");
+ ret.fbase.fonts[FONT_CODE] = make_std_font(fontlist, "Courier");
+ ret.fcode.font_size = 12;
+ ret.fcode.fonts[FONT_NORMAL] = make_std_font(fontlist, "Courier-Bold");
+ ret.fcode.fonts[FONT_EMPH] = make_std_font(fontlist, "Courier-Oblique");
+ ret.fcode.fonts[FONT_CODE] = make_std_font(fontlist, "Courier");
+ ret.ftitle.font_size = 24;
+ ret.ftitle.fonts[FONT_NORMAL] = make_std_font(fontlist, "Helvetica-Bold");
+ ret.ftitle.fonts[FONT_EMPH] =
+ make_std_font(fontlist, "Helvetica-BoldOblique");
+ ret.ftitle.fonts[FONT_CODE] = make_std_font(fontlist, "Courier-Bold");
+ ret.fchapter.font_size = 20;
+ ret.fchapter.fonts[FONT_NORMAL]= make_std_font(fontlist, "Helvetica-Bold");
+ ret.fchapter.fonts[FONT_EMPH] =
+ make_std_font(fontlist, "Helvetica-BoldOblique");
+ ret.fchapter.fonts[FONT_CODE] = make_std_font(fontlist, "Courier-Bold");
+ ret.nfsect = 3;
+ ret.fsect = snewn(ret.nfsect, font_cfg);
+ ret.fsect[0].font_size = 16;
+ ret.fsect[0].fonts[FONT_NORMAL]= make_std_font(fontlist, "Helvetica-Bold");
+ ret.fsect[0].fonts[FONT_EMPH] =
+ make_std_font(fontlist, "Helvetica-BoldOblique");
+ ret.fsect[0].fonts[FONT_CODE] = make_std_font(fontlist, "Courier-Bold");
+ ret.fsect[1].font_size = 14;
+ ret.fsect[1].fonts[FONT_NORMAL]= make_std_font(fontlist, "Helvetica-Bold");
+ ret.fsect[1].fonts[FONT_EMPH] =
+ make_std_font(fontlist, "Helvetica-BoldOblique");
+ ret.fsect[1].fonts[FONT_CODE] = make_std_font(fontlist, "Courier-Bold");
+ ret.fsect[2].font_size = 13;
+ ret.fsect[2].fonts[FONT_NORMAL]= make_std_font(fontlist, "Helvetica-Bold");
+ ret.fsect[2].fonts[FONT_EMPH] =
+ make_std_font(fontlist, "Helvetica-BoldOblique");
+ ret.fsect[2].fonts[FONT_CODE] = make_std_font(fontlist, "Courier-Bold");
+ ret.contents_indent_step = 24 * UNITS_PER_PT;
+ ret.contents_margin = 84 * UNITS_PER_PT;
+ ret.leader_separation = 12 * UNITS_PER_PT;
+ ret.index_gutter = 36 * UNITS_PER_PT;
+ ret.index_cols = 2;
+ ret.index_minsep = 18 * UNITS_PER_PT;
+ ret.pagenum_fontsize = 12;
+ ret.footer_distance = 32 * UNITS_PER_PT;
+ ret.lquote = L"\x2018\0\x2019\0'\0'\0\0";
+ ret.rquote = uadv(ret.lquote);
+ ret.bullet = L"\x2022\0-\0\0";
+ ret.contents_text = L"Contents";
+ ret.index_text = L"Index";
+
+ /*
+ * Two-pass configuration so that we can pick up global config
+ * (e.g. `quotes') before having it overridden by specific
+ * config (`paper-quotes'), irrespective of the order in which
+ * they occur.
+ */
+ for (p = source; p; p = p->next) {
+ if (p->type == para_Config) {
+ if (!ustricmp(p->keyword, L"quotes")) {
+ if (*uadv(p->keyword) && *uadv(uadv(p->keyword))) {
+ ret.lquote = uadv(p->keyword);
+ ret.rquote = uadv(ret.lquote);
+ }
+ }
+ }
+ }
+
+ for (p = source; p; p = p->next) {
+ p->private_data = NULL;
+ if (p->type == para_Config) {
+ if (!ustricmp(p->keyword, L"paper-quotes")) {
+ if (*uadv(p->keyword) && *uadv(uadv(p->keyword))) {
+ ret.lquote = uadv(p->keyword);
+ ret.rquote = uadv(ret.lquote);
+ }
+ } else if (!ustricmp(p->keyword, L"contents")) {
+ ret.contents_text = uadv(p->keyword);
+ } else if (!ustricmp(p->keyword, L"index")) {
+ ret.index_text = uadv(p->keyword);
+ } else if (!ustricmp(p->keyword, L"paper-bullet")) {
+ ret.bullet = uadv(p->keyword);
+ } else if (!ustricmp(p->keyword, L"paper-page-width")) {
+ ret.paper_width =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-page-height")) {
+ ret.paper_height =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-left-margin")) {
+ ret.left_margin =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-top-margin")) {
+ ret.top_margin =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-right-margin")) {
+ ret.right_margin =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-bottom-margin")) {
+ ret.bottom_margin =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-list-indent")) {
+ ret.indent_list_bullet =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-listitem-indent")) {
+ ret.indent_list =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-quote-indent")) {
+ ret.indent_quote =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-base-leading")) {
+ ret.base_leading =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-base-para-spacing")) {
+ ret.base_para_spacing =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-chapter-top-space")) {
+ ret.chapter_top_space =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-sect-num-left-space")) {
+ ret.sect_num_left_space =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-chapter-underline-depth")) {
+ ret.chapter_underline_depth =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-chapter-underline-thickness")) {
+ ret.chapter_underline_thickness =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-rule-thickness")) {
+ ret.rule_thickness =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-contents-indent-step")) {
+ ret.contents_indent_step =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-contents-margin")) {
+ ret.contents_margin =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-leader-separation")) {
+ ret.leader_separation =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-index-gutter")) {
+ ret.index_gutter =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-index-minsep")) {
+ ret.index_minsep =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-footer-distance")) {
+ ret.footer_distance =
+ (int) 0.5 + FUNITS_PER_PT * utof(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-base-font-size")) {
+ ret.fbase.font_size = utoi(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-index-columns")) {
+ ret.index_cols = utoi(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-pagenum-font-size")) {
+ ret.pagenum_fontsize = utoi(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-base-fonts")) {
+ paper_cfg_fonts(ret.fbase.fonts, fontlist, uadv(p->keyword),
+ &p->fpos);
+ } else if (!ustricmp(p->keyword, L"paper-code-font-size")) {
+ ret.fcode.font_size = utoi(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-code-fonts")) {
+ paper_cfg_fonts(ret.fcode.fonts, fontlist, uadv(p->keyword),
+ &p->fpos);
+ } else if (!ustricmp(p->keyword, L"paper-title-font-size")) {
+ ret.ftitle.font_size = utoi(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-title-fonts")) {
+ paper_cfg_fonts(ret.ftitle.fonts, fontlist, uadv(p->keyword),
+ &p->fpos);
+ } else if (!ustricmp(p->keyword, L"paper-chapter-font-size")) {
+ ret.fchapter.font_size = utoi(uadv(p->keyword));
+ } else if (!ustricmp(p->keyword, L"paper-chapter-fonts")) {
+ paper_cfg_fonts(ret.fchapter.fonts, fontlist, uadv(p->keyword),
+ &p->fpos);
+ } else if (!ustricmp(p->keyword, L"paper-section-font-size")) {
+ wchar_t *q = uadv(p->keyword);
+ int n = 0;
+ if (uisdigit(*q)) {
+ n = utoi(q);
+ q = uadv(q);
+ }
+ if (n >= ret.nfsect) {
+ int i;
+ ret.fsect = sresize(ret.fsect, n+1, font_cfg);
+ for (i = ret.nfsect; i <= n; i++)
+ ret.fsect[i] = ret.fsect[ret.nfsect-1];
+ ret.nfsect = n+1;
+ }
+ ret.fsect[n].font_size = utoi(q);
+ } else if (!ustricmp(p->keyword, L"paper-section-fonts")) {
+ wchar_t *q = uadv(p->keyword);
+ int n = 0;
+ if (uisdigit(*q)) {
+ n = utoi(q);
+ q = uadv(q);
+ }
+ if (n >= ret.nfsect) {
+ int i;
+ ret.fsect = sresize(ret.fsect, n+1, font_cfg);
+ for (i = ret.nfsect; i <= n; i++)
+ ret.fsect[i] = ret.fsect[ret.nfsect-1];
+ ret.nfsect = n+1;
+ }
+ paper_cfg_fonts(ret.fsect[n].fonts, fontlist, q, &p->fpos);
+ }
+ }
+ }
+
+ /*
+ * Set up the derived fields in the conf structure.
+ */
+
+ ret.base_width =
+ ret.paper_width - ret.left_margin - ret.right_margin;
+ ret.page_height =
+ ret.paper_height - ret.top_margin - ret.bottom_margin;
+ ret.indent_list = ret.indent_list_bullet + ret.indent_list_after;
+ ret.index_colwidth =
+ (ret.base_width - (ret.index_cols-1) * ret.index_gutter)
+ / ret.index_cols;
+
+ /*
+ * Now process fallbacks on quote characters and bullets. We
+ * use string_width() to determine whether all of the relevant
+ * fonts contain the same character, and fall back whenever we
+ * find a character which not all of them support.
+ */
+
+ /* Quote characters need not be supported in the fixed code fonts,
+ * but must be in the title and body fonts. */
+ while (*uadv(ret.rquote) && *uadv(uadv(ret.rquote))) {
+ int n;
+ if (fonts_ok(ret.lquote,
+ ret.fbase.fonts[FONT_NORMAL],
+ ret.fbase.fonts[FONT_EMPH],
+ ret.ftitle.fonts[FONT_NORMAL],
+ ret.ftitle.fonts[FONT_EMPH],
+ ret.fchapter.fonts[FONT_NORMAL],
+ ret.fchapter.fonts[FONT_EMPH], NULL) &&
+ fonts_ok(ret.rquote,
+ ret.fbase.fonts[FONT_NORMAL],
+ ret.fbase.fonts[FONT_EMPH],
+ ret.ftitle.fonts[FONT_NORMAL],
+ ret.ftitle.fonts[FONT_EMPH],
+ ret.fchapter.fonts[FONT_NORMAL],
+ ret.fchapter.fonts[FONT_EMPH], NULL)) {
+ for (n = 0; n < ret.nfsect; n++)
+ if (!fonts_ok(ret.lquote,
+ ret.fsect[n].fonts[FONT_NORMAL],
+ ret.fsect[n].fonts[FONT_EMPH], NULL) ||
+ !fonts_ok(ret.rquote,
+ ret.fsect[n].fonts[FONT_NORMAL],
+ ret.fsect[n].fonts[FONT_EMPH], NULL))
+ break;
+ if (n == ret.nfsect)
+ break;
+ }
+ ret.lquote = uadv(ret.rquote);
+ ret.rquote = uadv(ret.lquote);
+ }
+
+ /* The bullet character only needs to be supported in the normal body
+ * font (not even in italics). */
+ while (*ret.bullet && *uadv(ret.bullet) &&
+ !fonts_ok(ret.bullet, ret.fbase.fonts[FONT_NORMAL], NULL))
+ ret.bullet = uadv(ret.bullet);
+
+ return ret;
+}
+
+void *paper_pre_backend(paragraph *sourceform, keywordlist *keywords,
+ indexdata *idx) {
+ paragraph *p;
+ document *doc;
+ int indent, used_contents;
+ para_data *pdata, *firstpara = NULL, *lastpara = NULL;
+ para_data *firstcont, *lastcont;
+ line_data *firstline, *lastline, *firstcontline, *lastcontline;
+ page_data *pages;
+ font_list *fontlist;
+ paper_conf *conf, ourconf;
+ int has_index;
+ int pagenum;
+ paragraph index_placeholder_para;
+ page_data *first_index_page;
+
+ init_std_fonts();
+ fontlist = snew(font_list);
+ fontlist->head = fontlist->tail = NULL;
+
+ ourconf = paper_configure(sourceform, fontlist);
+ conf = &ourconf;
+
+ /*
+ * Set up a data structure to collect page numbers for each
+ * index entry.
+ */
+ {
+ int i;
+ indexentry *entry;
+
+ has_index = FALSE;
+
+ for (i = 0; (entry = index234(idx->entries, i)) != NULL; i++) {
+ paper_idx *pi = snew(paper_idx);
+
+ has_index = TRUE;
+
+ pi->words = pi->lastword = NULL;
+ pi->lastpage = NULL;
+
+ entry->backend_data = pi;
+ }
+ }
+
+ /*
+ * Format the contents entry for each heading.
+ */
+ {
+ word *contents_title;
+ contents_title = fake_word(conf->contents_text);
+
+ firstcont = make_para_data(para_UnnumberedChapter, 0, 0, 0,
+ NULL, NULL, contents_title, conf);
+ lastcont = firstcont;
+ lastcont->next = NULL;
+ firstcontline = firstcont->first;
+ lastcontline = lastcont->last;
+ for (p = sourceform; p; p = p->next) {
+ word *words;
+ int indent;
+
+ switch (p->type) {
+ case para_Chapter:
+ case para_Appendix:
+ case para_UnnumberedChapter:
+ case para_Heading:
+ case para_Subsect:
+ switch (p->type) {
+ case para_Chapter:
+ case para_Appendix:
+ words = prepare_contents_title(p->kwtext, L": ", p->words);
+ indent = 0;
+ break;
+ case para_UnnumberedChapter:
+ words = prepare_contents_title(NULL, NULL, p->words);
+ indent = 0;
+ break;
+ case para_Heading:
+ case para_Subsect:
+ words = prepare_contents_title(p->kwtext2, L" ", p->words);
+ indent = (p->aux + 1) * conf->contents_indent_step;
+ break;
+ }
+ pdata = make_para_data(para_Normal, p->aux, indent,
+ conf->contents_margin,
+ NULL, NULL, words, conf);
+ pdata->next = NULL;
+ pdata->contents_entry = p;
+ lastcont->next = pdata;
+ lastcont = pdata;
+
+ /*
+ * Link all contents line structures together into
+ * a big list.
+ */
+ if (pdata->first) {
+ if (lastcontline) {
+ lastcontline->next = pdata->first;
+ pdata->first->prev = lastcontline;
+ } else {
+ firstcontline = pdata->first;
+ pdata->first->prev = NULL;
+ }
+ lastcontline = pdata->last;
+ lastcontline->next = NULL;
+ }
+
+ break;
+ }
+ }
+
+ /*
+ * And one extra one, for the index.
+ */
+ if (has_index) {
+ pdata = make_para_data(para_Normal, 0, 0,
+ conf->contents_margin,
+ NULL, NULL,
+ fake_word(conf->index_text), conf);
+ pdata->next = NULL;
+ pdata->contents_entry = &index_placeholder_para;
+ lastcont->next = pdata;
+ lastcont = pdata;
+
+ if (pdata->first) {
+ if (lastcontline) {
+ lastcontline->next = pdata->first;
+ pdata->first->prev = lastcontline;
+ } else {
+ firstcontline = pdata->first;
+ pdata->first->prev = NULL;
+ }
+ lastcontline = pdata->last;
+ lastcontline->next = NULL;
+ }
+ }
+ }
+
+ /*
+ * Do the main paragraph formatting.
+ */
+ indent = 0;
+ used_contents = FALSE;
+ firstline = lastline = NULL;
+ for (p = sourceform; p; p = p->next) {
+ p->private_data = NULL;
+
+ switch (p->type) {
+ /*
+ * These paragraph types are either invisible or don't
+ * define text in the normal sense. Either way, they
+ * don't require wrapping.
+ */
+ case para_IM:
+ case para_BR:
+ case para_Biblio:
+ case para_NotParaType:
+ case para_Config:
+ case para_VersionID:
+ case para_NoCite:
+ break;
+
+ /*
+ * These paragraph types don't require wrapping, but
+ * they do affect the line width to which we wrap the
+ * rest of the paragraphs, so we need to pay attention.
+ */
+ case para_LcontPush:
+ indent += conf->indent_list; break;
+ case para_LcontPop:
+ indent -= conf->indent_list; assert(indent >= 0); break;
+ case para_QuotePush:
+ indent += conf->indent_quote; break;
+ case para_QuotePop:
+ indent -= conf->indent_quote; assert(indent >= 0); break;
+
+ /*
+ * This paragraph type is special. Process it
+ * specially.
+ */
+ case para_Code:
+ pdata = code_paragraph(indent, p->words, conf);
+ p->private_data = pdata;
+ if (pdata->first != pdata->last) {
+ pdata->first->penalty_after += 100000;
+ pdata->last->penalty_before += 100000;
+ }
+ break;
+
+ /*
+ * This paragraph is also special.
+ */
+ case para_Rule:
+ pdata = rule_paragraph(indent, conf);
+ p->private_data = pdata;
+ break;
+
+ /*
+ * All of these paragraph types require wrapping in the
+ * ordinary way. So we must supply a set of fonts, a
+ * line width and auxiliary information (e.g. bullet
+ * text) for each one.
+ */
+ case para_Chapter:
+ case para_Appendix:
+ case para_UnnumberedChapter:
+ case para_Heading:
+ case para_Subsect:
+ case para_Normal:
+ case para_BiblioCited:
+ case para_Bullet:
+ case para_NumberedList:
+ case para_DescribedThing:
+ case para_Description:
+ case para_Copyright:
+ case para_Title:
+ pdata = make_para_data(p->type, p->aux, indent, 0,
+ p->kwtext, p->kwtext2, p->words, conf);
+
+ p->private_data = pdata;
+
+ break;
+ }
+
+ if (p->private_data) {
+ pdata = (para_data *)p->private_data;
+
+ /*
+ * If this is the first non-title heading, we link the
+ * contents section in before it.
+ */
+ if (!used_contents && pdata->outline_level > 0) {
+ used_contents = TRUE;
+ if (lastpara)
+ lastpara->next = firstcont;
+ else
+ firstpara = firstcont;
+ lastpara = lastcont;
+ assert(lastpara->next == NULL);
+
+ if (lastline) {
+ lastline->next = firstcontline;
+ firstcontline->prev = lastline;
+ } else {
+ firstline = firstcontline;
+ firstcontline->prev = NULL;
+ }
+ assert(lastcontline != NULL);
+ lastline = lastcontline;
+ lastline->next = NULL;
+ }
+
+ /*
+ * Link all line structures together into a big list.
+ */
+ if (pdata->first) {
+ if (lastline) {
+ lastline->next = pdata->first;
+ pdata->first->prev = lastline;
+ } else {
+ firstline = pdata->first;
+ pdata->first->prev = NULL;
+ }
+ lastline = pdata->last;
+ lastline->next = NULL;
+ }
+
+ /*
+ * Link all paragraph structures together similarly.
+ */
+ pdata->next = NULL;
+ if (lastpara)
+ lastpara->next = pdata;
+ else
+ firstpara = pdata;
+ lastpara = pdata;
+ }
+ }
+
+ /*
+ * Now we have an enormous linked list of every line of text in
+ * the document. Break it up into pages.
+ */
+ pages = page_breaks(firstline, lastline, conf->page_height, 0, 0);
+
+ /*
+ * Number the pages.
+ */
+ {
+ char buf[40];
+ page_data *page;
+
+ pagenum = 0;
+
+ for (page = pages; page; page = page->next) {
+ sprintf(buf, "%d", ++pagenum);
+ page->number = ufroma_dup(buf, CS_ASCII);
+ }
+
+ if (has_index) {
+ first_index_page = snew(page_data);
+ first_index_page->next = first_index_page->prev = NULL;
+ first_index_page->first_line = NULL;
+ first_index_page->last_line = NULL;
+ first_index_page->first_text = first_index_page->last_text = NULL;
+ first_index_page->first_xref = first_index_page->last_xref = NULL;
+ first_index_page->first_rect = first_index_page->last_rect = NULL;
+
+ /* And don't forget the as-yet-uncreated index. */
+ sprintf(buf, "%d", ++pagenum);
+ first_index_page->number = ufroma_dup(buf, CS_ASCII);
+ }
+ }
+
+ /*
+ * Now we're ready to actually lay out the pages. We do this by
+ * looping over _paragraphs_, since we may need to track cross-
+ * references between lines and even across pages.
+ */
+ for (pdata = firstpara; pdata; pdata = pdata->next)
+ render_para(pdata, conf, keywords, idx,
+ &index_placeholder_para, first_index_page);
+
+ /*
+ * Now we've laid out the main body pages, we should have
+ * acquired a full set of page numbers for the index.
+ */
+ if (has_index) {
+ int i;
+ indexentry *entry;
+ word *index_title;
+ para_data *firstidx, *lastidx;
+ line_data *firstidxline, *lastidxline, *ldata;
+ page_data *ipages, *ipages2, *page;
+
+ /*
+ * Create a set of paragraphs for the index.
+ */
+ index_title = fake_word(conf->index_text);
+
+ firstidx = make_para_data(para_UnnumberedChapter, 0, 0, 0,
+ NULL, NULL, index_title, conf);
+ lastidx = firstidx;
+ lastidx->next = NULL;
+ firstidxline = firstidx->first;
+ lastidxline = lastidx->last;
+ for (i = 0; (entry = index234(idx->entries, i)) != NULL; i++) {
+ paper_idx *pi = (paper_idx *)entry->backend_data;
+ para_data *text, *pages;
+
+ if (!pi->words)
+ continue;
+
+ text = make_para_data(para_Normal, 0, 0,
+ conf->base_width - conf->index_colwidth,
+ NULL, NULL, entry->text, conf);
+
+ pages = make_para_data(para_Normal, 0, 0,
+ conf->base_width - conf->index_colwidth,
+ NULL, NULL, pi->words, conf);
+
+ text->justification = LEFT;
+ pages->justification = RIGHT;
+ text->last->space_after = pages->first->space_before =
+ conf->base_leading / 2;
+
+ pages->last->space_after = text->first->space_before =
+ conf->base_leading;
+
+ assert(text->first);
+ assert(pages->first);
+ assert(lastidxline);
+ assert(lastidx);
+
+ /*
+ * If feasible, fold the two halves of the index entry
+ * together.
+ */
+ if (text->last->real_shortfall + pages->first->real_shortfall >
+ conf->index_colwidth + conf->index_minsep) {
+ text->last->space_after = -1;
+ pages->first->space_before = -pages->first->line_height+1;
+ }
+
+ lastidx->next = text;
+ text->next = pages;
+ pages->next = NULL;
+ lastidx = pages;
+
+ /*
+ * Link all index line structures together into
+ * a big list.
+ */
+ text->last->next = pages->first;
+ pages->first->prev = text->last;
+
+ lastidxline->next = text->first;
+ text->first->prev = lastidxline;
+
+ lastidxline = pages->last;
+
+ /*
+ * Breaking an index entry anywhere is so bad that I
+ * think I'm going to forbid it totally.
+ */
+ for (ldata = text->first; ldata && ldata->next;
+ ldata = ldata->next) {
+ ldata->next->space_before += ldata->space_after + 1;
+ ldata->space_after = -1;
+ }
+ }
+
+ /*
+ * Now break the index into pages.
+ */
+ ipages = page_breaks(firstidxline, firstidxline, conf->page_height,
+ 0, 0);
+ ipages2 = page_breaks(firstidxline->next, lastidxline,
+ conf->page_height,
+ conf->index_cols,
+ firstidxline->space_before +
+ firstidxline->line_height +
+ firstidxline->space_after);
+
+ /*
+ * This will have put each _column_ of the index on a
+ * separate page, which isn't what we want. Fold the pages
+ * back together.
+ */
+ page = ipages2;
+ while (page) {
+ int i;
+
+ for (i = 1; i < conf->index_cols; i++)
+ if (page->next) {
+ page_data *tpage;
+
+ fold_into_page(page, page->next,
+ i * (conf->index_colwidth +
+ conf->index_gutter));
+ tpage = page->next;
+ page->next = page->next->next;
+ if (page->next)
+ page->next->prev = page;
+ sfree(tpage);
+ }
+
+ page = page->next;
+ }
+ /* Also fold the heading on to the same page as the index items. */
+ fold_into_page(ipages, ipages2, 0);
+ ipages->next = ipages2->next;
+ if (ipages->next)
+ ipages->next->prev = ipages;
+ sfree(ipages2);
+ fold_into_page(first_index_page, ipages, 0);
+ first_index_page->next = ipages->next;
+ if (first_index_page->next)
+ first_index_page->next->prev = first_index_page;
+ sfree(ipages);
+ ipages = first_index_page;
+
+ /*
+ * Number the index pages, except the already-numbered
+ * first one.
+ */
+ for (page = ipages->next; page; page = page->next) {
+ char buf[40];
+ sprintf(buf, "%d", ++pagenum);
+ page->number = ufroma_dup(buf, CS_ASCII);
+ }
+
+ /*
+ * Render the index pages.
+ */
+ for (pdata = firstidx; pdata; pdata = pdata->next)
+ render_para(pdata, conf, keywords, idx,
+ &index_placeholder_para, first_index_page);
+
+ /*
+ * Link the index page list on to the end of the main page
+ * list.
+ */
+ if (!pages)
+ pages = ipages;
+ else {
+ for (page = pages; page->next; page = page->next);
+ page->next = ipages;
+ }
+
+ /*
+ * Same with the paragraph list, which will cause the index
+ * to be mentioned in the document outline.
+ */
+ if (!firstpara)
+ firstpara = firstidx;
+ else
+ lastpara->next = firstidx;
+ lastpara = lastidx;
+ }
+
+ /*
+ * Draw the headers and footers.
+ *
+ * FIXME: this should be fully configurable, but for the moment
+ * I'm just going to put in page numbers in the centre of a
+ * footer and leave it at that.
+ */
+ {
+ page_data *page;
+
+ for (page = pages; page; page = page->next) {
+ int width;
+
+ width = conf->pagenum_fontsize *
+ string_width(conf->fbase.fonts[FONT_NORMAL], page->number,
+ NULL, 0);
+
+ render_string(page, conf->fbase.fonts[FONT_NORMAL],
+ conf->pagenum_fontsize,
+ conf->left_margin + (conf->base_width - width)/2,
+ conf->bottom_margin - conf->footer_distance,
+ page->number, 0);
+ }
+ }
+
+ /*
+ * Start putting together the overall document structure we're
+ * going to return.
+ */
+ doc = snew(document);
+ doc->fonts = fontlist;
+ doc->pages = pages;
+ doc->paper_width = conf->paper_width;
+ doc->paper_height = conf->paper_height;
+
+ /*
+ * Collect the section heading paragraphs into a document
+ * outline. This is slightly fiddly because the Title paragraph
+ * isn't required to be at the start, although all the others
+ * must be in order.
+ */
+ {
+ int osize = 20;
+
+ doc->outline_elements = snewn(osize, outline_element);
+ doc->n_outline_elements = 0;
+
+ /* First find the title. */
+ for (pdata = firstpara; pdata; pdata = pdata->next) {
+ if (pdata->outline_level == 0) {
+ doc->outline_elements[0].level = 0;
+ doc->outline_elements[0].pdata = pdata;
+ doc->n_outline_elements++;
+ break;
+ }
+ }
+
+ /* Then collect the rest. */
+ for (pdata = firstpara; pdata; pdata = pdata->next) {
+ if (pdata->outline_level > 0) {
+ if (doc->n_outline_elements >= osize) {
+ osize += 20;
+ doc->outline_elements =
+ sresize(doc->outline_elements, osize, outline_element);
+ }
+
+ doc->outline_elements[doc->n_outline_elements].level =
+ pdata->outline_level;
+ doc->outline_elements[doc->n_outline_elements].pdata = pdata;
+ doc->n_outline_elements++;
+ }
+ }
+ }
+
+ return doc;
+}
+
+static void setfont(para_data *p, font_cfg *f) {
+ int i;
+
+ for (i = 0; i < NFONTS; i++) {
+ p->fonts[i] = f->fonts[i];
+ p->sizes[i] = f->font_size;
+ }
+}
+
+static para_data *make_para_data(int ptype, int paux, int indent, int rmargin,
+ word *pkwtext, word *pkwtext2, word *pwords,
+ paper_conf *conf)
+{
+ para_data *pdata;
+ line_data *ldata;
+ int extra_indent, firstline_indent, aux_indent;
+ word *aux, *aux2;
+
+ pdata = snew(para_data);
+ pdata->outline_level = -1;
+ pdata->outline_title = NULL;
+ pdata->rect_type = RECT_NONE;
+ pdata->contents_entry = NULL;
+ pdata->justification = JUST;
+ pdata->extraflags = 0;
+
+ /*
+ * Choose fonts for this paragraph.
+ */
+ switch (ptype) {
+ case para_Title:
+ setfont(pdata, &conf->ftitle);
+ pdata->outline_level = 0;
+ break;
+
+ case para_Chapter:
+ case para_Appendix:
+ case para_UnnumberedChapter:
+ setfont(pdata, &conf->fchapter);
+ pdata->outline_level = 1;
+ break;
+
+ case para_Heading:
+ case para_Subsect:
+ setfont(pdata,
+ &conf->fsect[paux >= conf->nfsect ? conf->nfsect - 1 : paux]);
+ pdata->outline_level = 2 + paux;
+ break;
+
+ case para_Normal:
+ case para_BiblioCited:
+ case para_Bullet:
+ case para_NumberedList:
+ case para_DescribedThing:
+ case para_Description:
+ case para_Copyright:
+ setfont(pdata, &conf->fbase);
+ break;
+ }
+
+ /*
+ * Also select an indentation level depending on the
+ * paragraph type (list paragraphs other than
+ * para_DescribedThing need extra indent).
+ *
+ * (FIXME: Perhaps at some point we might even arrange
+ * for the user to be able to request indented first
+ * lines in paragraphs.)
+ */
+ if (ptype == para_Bullet ||
+ ptype == para_NumberedList ||
+ ptype == para_Description) {
+ extra_indent = firstline_indent = conf->indent_list;
+ } else {
+ extra_indent = firstline_indent = 0;
+ }
+
+ /*
+ * Find the auxiliary text for this paragraph.
+ */
+ aux = aux2 = NULL;
+ aux_indent = 0;
+
+ switch (ptype) {
+ case para_Chapter:
+ case para_Appendix:
+ case para_Heading:
+ case para_Subsect:
+ /*
+ * For some heading styles (FIXME: be able to
+ * configure which), the auxiliary text contains
+ * the chapter number and is arranged to be
+ * right-aligned a few points left of the primary
+ * margin. For other styles, the auxiliary text is
+ * the full chapter _name_ and takes up space
+ * within the (wrapped) chapter title, meaning that
+ * we must move the first line indent over to make
+ * space for it.
+ */
+ if (ptype == para_Heading || ptype == para_Subsect) {
+ int len;
+
+ aux = pkwtext2;
+ len = paper_width_simple(pdata, pkwtext2, conf);
+ aux_indent = -len - conf->sect_num_left_space;
+
+ pdata->outline_title =
+ prepare_outline_title(pkwtext2, L" ", pwords);
+ } else {
+ aux = pkwtext;
+ aux2 = fake_word(L": ");
+ aux_indent = 0;
+
+ firstline_indent += paper_width_simple(pdata, aux, conf);
+ firstline_indent += paper_width_simple(pdata, aux2, conf);
+
+ pdata->outline_title =
+ prepare_outline_title(pkwtext, L": ", pwords);
+ }
+ break;
+
+ case para_Bullet:
+ /*
+ * Auxiliary text consisting of a bullet.
+ */
+ aux = fake_word(conf->bullet);
+ aux_indent = indent + conf->indent_list_bullet;
+ break;
+
+ case para_NumberedList:
+ /*
+ * Auxiliary text consisting of the number followed
+ * by a (FIXME: configurable) full stop.
+ */
+ aux = pkwtext;
+ aux2 = fake_word(L".");
+ aux_indent = indent + conf->indent_list_bullet;
+ break;
+
+ case para_BiblioCited:
+ /*
+ * Auxiliary text consisting of the bibliography
+ * reference text, and a trailing space.
+ */
+ aux = pkwtext;
+ aux2 = fake_word(L" ");
+ aux_indent = indent;
+ firstline_indent += paper_width_simple(pdata, aux, conf);
+ firstline_indent += paper_width_simple(pdata, aux2, conf);
+ break;
+ }
+
+ if (pdata->outline_level >= 0 && !pdata->outline_title) {
+ pdata->outline_title =
+ prepare_outline_title(NULL, NULL, pwords);
+ }
+
+ wrap_paragraph(pdata, pwords, conf->base_width - rmargin,
+ indent + firstline_indent,
+ indent + extra_indent, conf);
+
+ pdata->first->aux_text = aux;
+ pdata->first->aux_text_2 = aux2;
+ pdata->first->aux_left_indent = aux_indent;
+
+ /*
+ * Line breaking penalties.
+ */
+ switch (ptype) {
+ case para_Chapter:
+ case para_Appendix:
+ case para_Heading:
+ case para_Subsect:
+ case para_UnnumberedChapter:
+ /*
+ * Fixed and large penalty for breaking straight
+ * after a heading; corresponding bonus for
+ * breaking straight before.
+ */
+ pdata->first->penalty_before = -500000;
+ pdata->last->penalty_after = 500000;
+ for (ldata = pdata->first; ldata; ldata = ldata->next)
+ ldata->penalty_after = 500000;
+ break;
+
+ case para_DescribedThing:
+ /*
+ * This is treated a bit like a small heading:
+ * there's a penalty for breaking after it (i.e.
+ * between it and its description), and a bonus for
+ * breaking before it (actually _between_ list
+ * items).
+ */
+ pdata->first->penalty_before = -200000;
+ pdata->last->penalty_after = 200000;
+ break;
+
+ default:
+ /*
+ * Most paragraph types: widow/orphan control by
+ * discouraging breaking one line from the end of
+ * any paragraph.
+ */
+ if (pdata->first != pdata->last) {
+ pdata->first->penalty_after = 100000;
+ pdata->last->penalty_before = 100000;
+ }
+ break;
+ }
+
+ standard_line_spacing(pdata, conf);
+
+ /*
+ * Some kinds of section heading require a page break before
+ * them and an underline after.
+ */
+ if (ptype == para_Title ||
+ ptype == para_Chapter ||
+ ptype == para_Appendix ||
+ ptype == para_UnnumberedChapter) {
+ pdata->first->page_break = TRUE;
+ pdata->first->space_before = conf->chapter_top_space;
+ pdata->last->space_after +=
+ (conf->chapter_underline_depth +
+ conf->chapter_underline_thickness);
+ pdata->rect_type = RECT_CHAPTER_UNDERLINE;
+ }
+
+ return pdata;
+}
+
+static void standard_line_spacing(para_data *pdata, paper_conf *conf)
+{
+ line_data *ldata;
+
+ /*
+ * Set the line spacing for each line in this paragraph.
+ */
+ for (ldata = pdata->first; ldata; ldata = ldata->next) {
+ if (ldata == pdata->first)
+ ldata->space_before = conf->base_para_spacing / 2;
+ else
+ ldata->space_before = conf->base_leading / 2;
+ if (ldata == pdata->last)
+ ldata->space_after = conf->base_para_spacing / 2;
+ else
+ ldata->space_after = conf->base_leading / 2;
+ ldata->page_break = FALSE;
+ }
+}
+
+static font_encoding *new_font_encoding(font_data *font)
+{
+ font_encoding *fe;
+ int i;
+
+ fe = snew(font_encoding);
+ fe->next = NULL;
+
+ if (font->list->tail)
+ font->list->tail->next = fe;
+ else
+ font->list->head = fe;
+ font->list->tail = fe;
+
+ fe->font = font;
+ fe->free_pos = 0x21;
+
+ for (i = 0; i < 256; i++) {
+ fe->vector[i] = NOGLYPH;
+ fe->to_unicode[i] = 0xFFFF;
+ }
+
+ return fe;
+}
+
+static subfont_map_entry *encode_glyph_at(glyph g, wchar_t u,
+ font_encoding *fe, int pos)
+{
+ subfont_map_entry *sme = snew(subfont_map_entry);
+
+ sme->subfont = fe;
+ sme->position = pos;
+ fe->vector[pos] = g;
+ fe->to_unicode[pos] = u;
+ add234(fe->font->subfont_map, sme);
+ return sme;
+}
+
+static int new_sfmap_cmp(void *a, void *b)
+{
+ glyph ga = *(glyph *)a;
+ subfont_map_entry *sb = b;
+ glyph gb = sb->subfont->vector[sb->position];
+
+ if (ga < gb) return -1;
+ if (ga > gb) return 1;
+ return 0;
+}
+
+static subfont_map_entry *encode_glyph(glyph g, wchar_t u, font_data *font)
+{
+ subfont_map_entry *sme;
+ int c;
+
+ sme = find234(font->subfont_map, &g, new_sfmap_cmp);
+ if (sme) return sme;
+
+ /*
+ * This character is not yet in a subfont. Assign one.
+ */
+ if (font->latest_subfont->free_pos >= 0x100)
+ font->latest_subfont = new_font_encoding(font);
+
+ c = font->latest_subfont->free_pos++;
+ if (font->latest_subfont->free_pos == 0x7F)
+ font->latest_subfont->free_pos = 0xA1;
+
+ return encode_glyph_at(g, u, font->latest_subfont, c);
+}
+
+static int sfmap_cmp(void *a, void *b)
+{
+ subfont_map_entry *sa = a, *sb = b;
+ glyph ga = sa->subfont->vector[sa->position];
+ glyph gb = sb->subfont->vector[sb->position];
+
+ if (ga < gb) return -1;
+ if (ga > gb) return 1;
+ return 0;
+}
+
+int width_cmp(void *a, void *b)
+{
+ glyph_width const *wa = a, *wb = b;
+
+ if (wa->glyph < wb->glyph)
+ return -1;
+ if (wa->glyph > wb->glyph)
+ return 1;
+ return 0;
+}
+
+int kern_cmp(void *a, void *b)
+{
+ kern_pair const *ka = a, *kb = b;
+
+ if (ka->left < kb->left)
+ return -1;
+ if (ka->left > kb->left)
+ return 1;
+ if (ka->right < kb->right)
+ return -1;
+ if (ka->right > kb->right)
+ return 1;
+ return 0;
+}
+
+int lig_cmp(void *a, void *b)
+{
+ ligature const *la = a, *lb = b;
+
+ if (la->left < lb->left)
+ return -1;
+ if (la->left > lb->left)
+ return 1;
+ if (la->right < lb->right)
+ return -1;
+ if (la->right > lb->right)
+ return 1;
+ return 0;
+}
+
+static int utoglyph(font_info const *fi, wchar_t u) {
+ return (u < 0 || u > 0xFFFF ? NOGLYPH : fi->bmp[u]);
+}
+
+static font_data *make_std_font(font_list *fontlist, char const *name)
+{
+ font_info const *fi;
+ font_data *f;
+ font_encoding *fe;
+ int i;
+
+ for (fe = fontlist->head; fe; fe = fe->next)
+ if (strcmp(fe->font->info->name, name) == 0)
+ return fe->font;
+
+ for (fi = all_fonts; fi; fi = fi->next)
+ if (strcmp(fi->name, name) == 0) break;
+ if (!fi) return NULL;
+
+ f = snew(font_data);
+
+ f->list = fontlist;
+ f->info = fi;
+ f->subfont_map = newtree234(sfmap_cmp);
+
+ /*
+ * Our first subfont will contain all of US-ASCII. This isn't
+ * really necessary - we could just create custom subfonts
+ * precisely as the whim of render_string dictated - but
+ * instinct suggests that it might be nice to have the text in
+ * the output files look _marginally_ recognisable.
+ */
+ fe = new_font_encoding(f);
+ fe->free_pos = 0xA1; /* only the top half is free */
+ f->latest_subfont = fe;
+
+ for (i = 0x20; i <= 0x7E; i++) {
+ glyph g = utoglyph(fi, i);
+ if (g != NOGLYPH)
+ encode_glyph_at(g, i, fe, i);
+ }
+
+ return f;
+}
+
+/* NB: arguments are glyph numbers from font->bmp. */
+int find_width(font_data *font, glyph index)
+{
+ glyph_width wantw;
+ glyph_width const *w;
+
+ wantw.glyph = index;
+ w = find234(font->info->widths, &wantw, NULL);
+ if (!w) return 0;
+ return w->width;
+}
+
+static int find_kern(font_data *font, int lindex, int rindex)
+{
+ kern_pair wantkp;
+ kern_pair const *kp;
+
+ if (lindex == NOGLYPH || rindex == NOGLYPH)
+ return 0;
+ wantkp.left = lindex;
+ wantkp.right = rindex;
+ kp = find234(font->info->kerns, &wantkp, NULL);
+ if (kp == NULL)
+ return 0;
+ return kp->kern;
+}
+
+static int find_lig(font_data *font, int lindex, int rindex)
+{
+ ligature wantlig;
+ ligature const *lig;
+
+ if (lindex == NOGLYPH || rindex == NOGLYPH)
+ return NOGLYPH;
+ wantlig.left = lindex;
+ wantlig.right = rindex;
+ lig = find234(font->info->ligs, &wantlig, NULL);
+ if (lig == NULL)
+ return NOGLYPH;
+ return lig->lig;
+}
+
+static int string_width(font_data *font, wchar_t const *string, int *errs,
+ unsigned flags)
+{
+ int width = 0;
+ int nindex, index, oindex, lindex;
+
+ if (errs)
+ *errs = 0;
+
+ oindex = NOGLYPH;
+ index = utoglyph(font->info, *string);
+ for (; *string; string++) {
+ nindex = utoglyph(font->info, string[1]);
+
+ if (index == NOGLYPH) {
+ if (errs)
+ *errs = 1;
+ } else {
+ if (!(flags & RS_NOLIG) &&
+ (lindex = find_lig(font, index, nindex)) != NOGLYPH) {
+ index = lindex;
+ continue;
+ }
+ width += find_kern(font, oindex, index) + find_width(font, index);
+ }
+ oindex = index;
+ index = nindex;
+ }
+
+ return width;
+}
+
+static int paper_width_internal(void *vctx, word *word, int *nspaces);
+
+struct paper_width_ctx {
+ int minspacewidth;
+ para_data *pdata;
+ paper_conf *conf;
+};
+
+static int paper_width_list(void *vctx, word *text, word *end, int *nspaces) {
+ int w = 0;
+ while (text && text != end) {
+ w += paper_width_internal(vctx, text, nspaces);
+ text = text->next;
+ }
+ return w;
+}
+
+static int paper_width_internal(void *vctx, word *word, int *nspaces)
+{
+ struct paper_width_ctx *ctx = (struct paper_width_ctx *)vctx;
+ int style, type, findex, width, errs;
+ wchar_t *str;
+ unsigned flags = 0;
+
+ switch (word->type) {
+ case word_HyperLink:
+ case word_HyperEnd:
+ case word_UpperXref:
+ case word_LowerXref:
+ case word_PageXref:
+ case word_XrefEnd:
+ case word_IndexRef:
+ return 0;
+ }
+
+ style = towordstyle(word->type);
+ type = removeattr(word->type);
+
+ findex = (style == word_Normal ? FONT_NORMAL :
+ style == word_Emph ? FONT_EMPH :
+ FONT_CODE);
+
+ if (style == word_Code || style == word_WeakCode) flags |= RS_NOLIG;
+
+ if (type == word_Normal) {
+ str = word->text;
+ } else if (type == word_WhiteSpace) {
+ if (findex != FONT_CODE) {
+ if (nspaces)
+ (*nspaces)++;
+ return ctx->minspacewidth;
+ } else
+ str = L" ";
+ } else /* if (type == word_Quote) */ {
+ if (word->aux == quote_Open)
+ str = ctx->conf->lquote;
+ else
+ str = ctx->conf->rquote;
+ }
+
+ width = string_width(ctx->pdata->fonts[findex], str, &errs, flags);
+
+ if (errs && word->alt)
+ return paper_width_list(vctx, word->alt, NULL, nspaces);
+ else
+ return ctx->pdata->sizes[findex] * width;
+}
+
+static int paper_width(void *vctx, word *word)
+{
+ return paper_width_internal(vctx, word, NULL);
+}
+
+static int paper_width_simple(para_data *pdata, word *text, paper_conf *conf)
+{
+ struct paper_width_ctx ctx;
+
+ ctx.pdata = pdata;
+ ctx.minspacewidth =
+ (pdata->sizes[FONT_NORMAL] *
+ string_width(pdata->fonts[FONT_NORMAL], L" ", NULL, 0));
+ ctx.conf = conf;
+
+ return paper_width_list(&ctx, text, NULL, NULL);
+}
+
+static void wrap_paragraph(para_data *pdata, word *words,
+ int w, int i1, int i2, paper_conf *conf)
+{
+ wrappedline *wrapping, *p;
+ int spacewidth;
+ struct paper_width_ctx ctx;
+ int line_height;
+
+ /*
+ * We're going to need to store the line height in every line
+ * structure we generate.
+ */
+ {
+ int i;
+ line_height = 0;
+ for (i = 0; i < NFONTS; i++)
+ if (line_height < pdata->sizes[i])
+ line_height = pdata->sizes[i];
+ line_height *= UNITS_PER_PT;
+ }
+
+ spacewidth = (pdata->sizes[FONT_NORMAL] *
+ string_width(pdata->fonts[FONT_NORMAL], L" ", NULL, 0));
+ if (spacewidth == 0) {
+ /*
+ * A font without a space?! Disturbing. I hope this never
+ * comes up, but I'll make a random guess anyway and set my
+ * space width to half the point size.
+ */
+ spacewidth = pdata->sizes[FONT_NORMAL] * UNITS_PER_PT / 2;
+ }
+
+ /*
+ * I'm going to set the _minimum_ space width to 3/5 of the
+ * standard one, and use the standard one as the optimum.
+ */
+ ctx.minspacewidth = spacewidth * 3 / 5;
+ ctx.pdata = pdata;
+ ctx.conf = conf;
+
+ wrapping = wrap_para(words, w - i1, w - i2, paper_width, &ctx, spacewidth);
+
+ /*
+ * Having done the wrapping, we now concoct a set of line_data
+ * structures.
+ */
+ pdata->first = pdata->last = NULL;
+
+ for (p = wrapping; p; p = p->next) {
+ line_data *ldata;
+ word *wd;
+ int len, wid, spaces;
+
+ ldata = snew(line_data);
+
+ ldata->pdata = pdata;
+ ldata->first = p->begin;
+ ldata->end = p->end;
+ ldata->line_height = line_height;
+
+ ldata->xpos = (p == wrapping ? i1 : i2);
+
+ if (pdata->last) {
+ pdata->last->next = ldata;
+ ldata->prev = pdata->last;
+ } else {
+ pdata->first = ldata;
+ ldata->prev = NULL;
+ }
+ ldata->next = NULL;
+ pdata->last = ldata;
+
+ spaces = 0;
+ len = paper_width_list(&ctx, ldata->first, ldata->end, &spaces);
+ wid = (p == wrapping ? w - i1 : w - i2);
+ wd = ldata->first;
+
+ ldata->hshortfall = wid - len;
+ ldata->nspaces = spaces;
+ /*
+ * This tells us how much the space width needs to
+ * change from _min_spacewidth. But we want to store
+ * its difference from the _natural_ space width, to
+ * make the text rendering easier.
+ */
+ ldata->hshortfall += ctx.minspacewidth * spaces;
+ ldata->hshortfall -= spacewidth * spaces;
+ ldata->real_shortfall = ldata->hshortfall;
+ /*
+ * Special case: on the last line of a paragraph, we
+ * never stretch spaces.
+ */
+ if (ldata->hshortfall > 0 && !p->next)
+ ldata->hshortfall = 0;
+
+ ldata->aux_text = NULL;
+ ldata->aux_text_2 = NULL;
+ ldata->aux_left_indent = 0;
+ ldata->penalty_before = ldata->penalty_after = 0;
+ }
+
+}
+
+static page_data *page_breaks(line_data *first, line_data *last,
+ int page_height, int ncols, int headspace)
+{
+ line_data *l, *m;
+ page_data *ph, *pt;
+ int n, n1, this_height;
+
+ /*
+ * Page breaking is done by a close analogue of the optimal
+ * paragraph wrapping algorithm used by wrap_para(). We work
+ * backwards from the end of the document line by line; for
+ * each line, we contemplate every possible number of lines we
+ * could put on a page starting with that line, determine a
+ * cost function for each one, add it to the pre-computed cost
+ * function for optimally page-breaking everything after that
+ * page, and pick the best option.
+ *
+ * This is made slightly more complex by the fact that we have
+ * a multi-column index with a heading at the top of the
+ * _first_ page, meaning that the first _ncols_ pages must have
+ * a different length. Hence, we must do the wrapping ncols+1
+ * times over, hypothetically trying to put every subsequence
+ * on every possible page.
+ *
+ * Since my line_data structures are only used for this
+ * purpose, I might as well just store the algorithm data
+ * directly in them.
+ */
+
+ for (l = last; l; l = l->prev) {
+ l->bestcost = snewn(ncols+1, int);
+ l->vshortfall = snewn(ncols+1, int);
+ l->text = snewn(ncols+1, int);
+ l->space = snewn(ncols+1, int);
+ l->page_last = snewn(ncols+1, line_data *);
+
+ for (n = 0; n <= ncols; n++) {
+ int minheight, text = 0, space = 0;
+ int cost;
+
+ n1 = (n < ncols ? n+1 : ncols);
+ if (n < ncols)
+ this_height = page_height - headspace;
+ else
+ this_height = page_height;
+
+ l->bestcost[n] = -1;
+ for (m = l; m; m = m->next) {
+ if (m != l && m->page_break)
+ break; /* we've gone as far as we can */
+
+ if (m != l) {
+ if (m->prev->space_after > 0)
+ space += m->prev->space_after;
+ else
+ text += m->prev->space_after;
+ }
+ if (m != l || m->page_break) {
+ if (m->space_before > 0)
+ space += m->space_before;
+ else
+ text += m->space_before;
+ }
+ text += m->line_height;
+ minheight = text + space;
+
+ if (m != l && minheight > this_height)
+ break;
+
+ /*
+ * If the space after this paragraph is _negative_
+ * (which means the next line is folded on to this
+ * one, which happens in the index), we absolutely
+ * cannot break here.
+ */
+ if (m->space_after >= 0) {
+
+ /*
+ * Compute the cost of this arrangement, as the
+ * square of the amount of wasted space on the
+ * page. Exception: if this is the last page
+ * before a mandatory break or the document
+ * end, we don't penalise a large blank area.
+ */
+ if (m != last && m->next && !m->next->page_break)
+ {
+ int x = (this_height - minheight) / FUNITS_PER_PT *
+ 4096.0;
+ int xf;
+
+ xf = x & 0xFF;
+ x >>= 8;
+
+ cost = x*x;
+ cost += (x * xf) >> 8;
+ } else
+ cost = 0;
+
+ if (m != last && m->next && !m->next->page_break) {
+ cost += m->penalty_after;
+ cost += m->next->penalty_before;
+ }
+
+ if (m != last && m->next && !m->next->page_break)
+ cost += m->next->bestcost[n1];
+ if (l->bestcost[n] == -1 || l->bestcost[n] > cost) {
+ /*
+ * This is the best option yet for this
+ * starting point.
+ */
+ l->bestcost[n] = cost;
+ if (m != last && m->next && !m->next->page_break)
+ l->vshortfall[n] = this_height - minheight;
+ else
+ l->vshortfall[n] = 0;
+ l->text[n] = text;
+ l->space[n] = space;
+ l->page_last[n] = m;
+ }
+ }
+
+ if (m == last)
+ break;
+ }
+ }
+ }
+
+ /*
+ * Now go through the line list forwards and assemble the
+ * actual pages.
+ */
+ ph = pt = NULL;
+
+ l = first;
+ n = 0;
+ while (l) {
+ page_data *page;
+ int text, space, head;
+
+ page = snew(page_data);
+ page->next = NULL;
+ page->prev = pt;
+ if (pt)
+ pt->next = page;
+ else
+ ph = page;
+ pt = page;
+
+ page->first_line = l;
+ page->last_line = l->page_last[n];
+
+ page->first_text = page->last_text = NULL;
+ page->first_xref = page->last_xref = NULL;
+ page->first_rect = page->last_rect = NULL;
+
+ /*
+ * Now assign a y-coordinate to each line on the page.
+ */
+ text = space = 0;
+ head = (n < ncols ? headspace : 0);
+ for (l = page->first_line; l; l = l->next) {
+ if (l != page->first_line) {
+ if (l->prev->space_after > 0)
+ space += l->prev->space_after;
+ else
+ text += l->prev->space_after;
+ }
+ if (l != page->first_line || l->page_break) {
+ if (l->space_before > 0)
+ space += l->space_before;
+ else
+ text += l->space_before;
+ }
+ text += l->line_height;
+
+ l->page = page;
+ l->ypos = text + space + head;
+ if (page->first_line->space[n]) {
+ l->ypos += space * (float)page->first_line->vshortfall[n] /
+ page->first_line->space[n];
+ }
+
+ if (l == page->last_line)
+ break;
+ }
+
+ l = page->last_line;
+ if (l == last)
+ break;
+ l = l->next;
+
+ n = (n < ncols ? n+1 : ncols);
+ }
+
+ return ph;
+}
+
+static void add_rect_to_page(page_data *page, int x, int y, int w, int h)
+{
+ rect *r = snew(rect);
+
+ r->next = NULL;
+ if (page->last_rect)
+ page->last_rect->next = r;
+ else
+ page->first_rect = r;
+ page->last_rect = r;
+
+ r->x = x;
+ r->y = y;
+ r->w = w;
+ r->h = h;
+}
+
+static void add_string_to_page(page_data *page, int x, int y,
+ font_encoding *fe, int size, char *text,
+ int width)
+{
+ text_fragment *frag;
+
+ frag = snew(text_fragment);
+ frag->next = NULL;
+
+ if (page->last_text)
+ page->last_text->next = frag;
+ else
+ page->first_text = frag;
+ page->last_text = frag;
+
+ frag->x = x;
+ frag->y = y;
+ frag->fe = fe;
+ frag->fontsize = size;
+ frag->text = dupstr(text);
+ frag->width = width;
+}
+
+/*
+ * Returns the updated x coordinate.
+ */
+static int render_string(page_data *page, font_data *font, int fontsize,
+ int x, int y, wchar_t *str, unsigned flags)
+{
+ char *text;
+ int textpos, textwid, kern, nglyph, glyph, oglyph, lig;
+ font_encoding *subfont = NULL, *sf;
+ subfont_map_entry *sme;
+
+ text = snewn(1 + ustrlen(str), char);
+ textpos = textwid = 0;
+
+ glyph = NOGLYPH;
+ nglyph = utoglyph(font->info, *str);
+ while (*str) {
+ oglyph = glyph;
+ glyph = nglyph;
+ nglyph = utoglyph(font->info, str[1]);
+
+ if (glyph == NOGLYPH) {
+ str++;
+ continue; /* nothing more we can do here */
+ }
+
+ if (!(flags & RS_NOLIG) &&
+ (lig = find_lig(font, glyph, nglyph)) != NOGLYPH) {
+ nglyph = lig;
+ str++;
+ continue;
+ }
+
+ /*
+ * Find which subfont this character is going in.
+ */
+ sme = encode_glyph(glyph, *str, font);
+ sf = sme->subfont;
+
+ kern = find_kern(font, oglyph, glyph) * fontsize;
+
+ if (!subfont || sf != subfont || kern) {
+ if (subfont) {
+ text[textpos] = '\0';
+ add_string_to_page(page, x, y, subfont, fontsize, text,
+ textwid);
+ x += textwid + kern;
+ } else {
+ assert(textpos == 0);
+ }
+ textpos = 0;
+ textwid = 0;
+ subfont = sf;
+ }
+
+ text[textpos++] = sme->position;
+ textwid += find_width(font, glyph) * fontsize;
+
+ str++;
+ }
+
+ if (textpos > 0) {
+ text[textpos] = '\0';
+ add_string_to_page(page, x, y, subfont, fontsize, text, textwid);
+ x += textwid;
+ }
+
+ return x;
+}
+
+/*
+ * Returns the updated x coordinate.
+ */
+static int render_text(page_data *page, para_data *pdata, line_data *ldata,
+ int x, int y, word *text, word *text_end, xref **xr,
+ int shortfall, int nspaces, int *nspace,
+ keywordlist *keywords, indexdata *idx, paper_conf *conf)
+{
+ while (text && text != text_end) {
+ int style, type, findex, errs;
+ wchar_t *str;
+ xref_dest dest;
+ unsigned flags = 0;
+
+ switch (text->type) {
+ /*
+ * Start a cross-reference.
+ */
+ case word_HyperLink:
+ case word_UpperXref:
+ case word_LowerXref:
+ case word_PageXref:
+
+ if (text->type == word_HyperLink) {
+ dest.type = URL;
+ dest.url = utoa_dup(text->text, CS_ASCII);
+ dest.page = NULL;
+ } else if (text->type == word_PageXref) {
+ dest.type = PAGE;
+ dest.url = NULL;
+ dest.page = (page_data *)text->private_data;
+ } else {
+ keyword *kwl = kw_lookup(keywords, text->text);
+ para_data *pdata;
+
+ if (kwl) {
+ assert(kwl->para->private_data);
+ pdata = (para_data *) kwl->para->private_data;
+ dest.type = PAGE;
+ dest.page = pdata->first->page;
+ dest.url = NULL;
+ } else {
+ /*
+ * Shouldn't happen, but *shrug*
+ */
+ dest.type = NONE;
+ dest.page = NULL;
+ dest.url = NULL;
+ }
+ }
+ if (dest.type != NONE) {
+ *xr = snew(xref);
+ (*xr)->dest = dest; /* structure copy */
+ if (page->last_xref)
+ page->last_xref->next = *xr;
+ else
+ page->first_xref = *xr;
+ page->last_xref = *xr;
+ (*xr)->next = NULL;
+
+ /*
+ * FIXME: Ideally we should have, and use, some
+ * vertical font metric information here so that
+ * our cross-ref rectangle can take account of
+ * descenders and the font's cap height. This will
+ * do for the moment, but it isn't ideal.
+ */
+ (*xr)->lx = (*xr)->rx = x;
+ (*xr)->by = y;
+ (*xr)->ty = y + ldata->line_height;
+ }
+ goto nextword;
+
+ /*
+ * Finish extending a cross-reference box.
+ */
+ case word_HyperEnd:
+ case word_XrefEnd:
+ *xr = NULL;
+ goto nextword;
+
+ /*
+ * Add the current page number to the list of pages
+ * referenced by an index entry.
+ */
+ case word_IndexRef:
+ /*
+ * We don't create index references in contents entries.
+ */
+ if (!pdata->contents_entry) {
+ indextag *tag;
+ int i;
+
+ tag = index_findtag(idx, text->text);
+ if (!tag)
+ goto nextword;
+
+ for (i = 0; i < tag->nrefs; i++) {
+ indexentry *entry = tag->refs[i];
+ paper_idx *pi = (paper_idx *)entry->backend_data;
+
+ /*
+ * If the same index term is indexed twice
+ * within the same section, we only want to
+ * mention it once in the index.
+ */
+ if (pi->lastpage != page) {
+ word **wp;
+
+ if (pi->lastword) {
+ pi->lastword = pi->lastword->next =
+ fake_word(L",");
+ pi->lastword = pi->lastword->next =
+ fake_space_word();
+ wp = &pi->lastword->next;
+ } else
+ wp = &pi->words;
+
+ pi->lastword = *wp =
+ fake_page_ref(page);
+ pi->lastword = pi->lastword->next =
+ fake_word(page->number);
+ pi->lastword = pi->lastword->next =
+ fake_end_ref();
+ }
+
+ pi->lastpage = page;
+ }
+ }
+ goto nextword;
+ }
+
+ style = towordstyle(text->type);
+ type = removeattr(text->type);
+
+ findex = (style == word_Normal ? FONT_NORMAL :
+ style == word_Emph ? FONT_EMPH :
+ FONT_CODE);
+
+ if (style == word_Code || style == word_WeakCode) flags |= RS_NOLIG;
+ flags |= pdata->extraflags;
+
+ if (type == word_Normal) {
+ str = text->text;
+ } else if (type == word_WhiteSpace) {
+ x += pdata->sizes[findex] *
+ string_width(pdata->fonts[findex], L" ", NULL, 0);
+ if (nspaces && findex != FONT_CODE) {
+ x += (*nspace+1) * shortfall / nspaces;
+ x -= *nspace * shortfall / nspaces;
+ (*nspace)++;
+ }
+ goto nextword;
+ } else /* if (type == word_Quote) */ {
+ if (text->aux == quote_Open)
+ str = conf->lquote;
+ else
+ str = conf->rquote;
+ }
+
+ (void) string_width(pdata->fonts[findex], str, &errs, flags);
+
+ if (errs && text->alt)
+ x = render_text(page, pdata, ldata, x, y, text->alt, NULL,
+ xr, shortfall, nspaces, nspace, keywords, idx,
+ conf);
+ else
+ x = render_string(page, pdata->fonts[findex],
+ pdata->sizes[findex], x, y, str, flags);
+
+ if (*xr)
+ (*xr)->rx = x;
+
+ nextword:
+ text = text->next;
+ }
+
+ return x;
+}
+
+/*
+ * Returns the last x position used on the line.
+ */
+static int render_line(line_data *ldata, int left_x, int top_y,
+ xref_dest *dest, keywordlist *keywords, indexdata *idx,
+ paper_conf *conf)
+{
+ int nspace;
+ xref *xr;
+ int ret = 0;
+
+ if (ldata->aux_text) {
+ int x;
+ xr = NULL;
+ nspace = 0;
+ x = render_text(ldata->page, ldata->pdata, ldata,
+ left_x + ldata->aux_left_indent,
+ top_y - ldata->ypos,
+ ldata->aux_text, NULL, &xr, 0, 0, &nspace,
+ keywords, idx, conf);
+ if (ldata->aux_text_2)
+ render_text(ldata->page, ldata->pdata, ldata,
+ x, top_y - ldata->ypos,
+ ldata->aux_text_2, NULL, &xr, 0, 0, &nspace,
+ keywords, idx, conf);
+ }
+ nspace = 0;
+
+ if (ldata->first) {
+ /*
+ * There might be a cross-reference carried over from a
+ * previous line.
+ */
+ if (dest->type != NONE) {
+ xr = snew(xref);
+ xr->next = NULL;
+ xr->dest = *dest; /* structure copy */
+ if (ldata->page->last_xref)
+ ldata->page->last_xref->next = xr;
+ else
+ ldata->page->first_xref = xr;
+ ldata->page->last_xref = xr;
+ xr->lx = xr->rx = left_x + ldata->xpos;
+ xr->by = top_y - ldata->ypos;
+ xr->ty = top_y - ldata->ypos + ldata->line_height;
+ } else
+ xr = NULL;
+
+ {
+ int extra_indent, shortfall, spaces;
+ int just = ldata->pdata->justification;
+
+ /*
+ * All forms of justification become JUST when we have
+ * to squeeze the paragraph.
+ */
+ if (ldata->hshortfall < 0)
+ just = JUST;
+
+ switch (just) {
+ case JUST:
+ shortfall = ldata->hshortfall;
+ spaces = ldata->nspaces;
+ extra_indent = 0;
+ break;
+ case LEFT:
+ shortfall = spaces = extra_indent = 0;
+ break;
+ case RIGHT:
+ shortfall = spaces = 0;
+ extra_indent = ldata->real_shortfall;
+ break;
+ }
+
+ ret = render_text(ldata->page, ldata->pdata, ldata,
+ left_x + ldata->xpos + extra_indent,
+ top_y - ldata->ypos, ldata->first, ldata->end,
+ &xr, shortfall, spaces, &nspace,
+ keywords, idx, conf);
+ }
+
+ if (xr) {
+ /*
+ * There's a cross-reference continued on to the next line.
+ */
+ *dest = xr->dest;
+ } else
+ dest->type = NONE;
+ }
+
+ return ret;
+}
+
+static void render_para(para_data *pdata, paper_conf *conf,
+ keywordlist *keywords, indexdata *idx,
+ paragraph *index_placeholder, page_data *index_page)
+{
+ int last_x;
+ xref *cxref;
+ page_data *cxref_page;
+ xref_dest dest;
+ para_data *target;
+ line_data *ldata;
+
+ dest.type = NONE;
+ cxref = NULL;
+ cxref_page = NULL;
+
+ for (ldata = pdata->first; ldata; ldata = ldata->next) {
+ /*
+ * If this is a contents entry, we expect to have a single
+ * enormous cross-reference rectangle covering the whole
+ * thing. (Unless, of course, it spans multiple pages.)
+ */
+ if (pdata->contents_entry && ldata->page != cxref_page) {
+ cxref_page = ldata->page;
+ cxref = snew(xref);
+ cxref->next = NULL;
+ cxref->dest.type = PAGE;
+ if (pdata->contents_entry == index_placeholder) {
+ cxref->dest.page = index_page;
+ } else {
+ assert(pdata->contents_entry->private_data);
+ target = (para_data *)pdata->contents_entry->private_data;
+ cxref->dest.page = target->first->page;
+ }
+ cxref->dest.url = NULL;
+ if (ldata->page->last_xref)
+ ldata->page->last_xref->next = cxref;
+ else
+ ldata->page->first_xref = cxref;
+ ldata->page->last_xref = cxref;
+ cxref->lx = conf->left_margin;
+ cxref->rx = conf->paper_width - conf->right_margin;
+ cxref->ty = conf->paper_height - conf->top_margin
+ - ldata->ypos + ldata->line_height;
+ }
+ if (pdata->contents_entry) {
+ assert(cxref != NULL);
+ cxref->by = conf->paper_height - conf->top_margin
+ - ldata->ypos;
+ }
+
+ last_x = render_line(ldata, conf->left_margin,
+ conf->paper_height - conf->top_margin,
+ &dest, keywords, idx, conf);
+ if (ldata == pdata->last)
+ break;
+ }
+
+ /*
+ * If this is a contents entry, add leaders and a page
+ * number.
+ */
+ if (pdata->contents_entry) {
+ word *w;
+ wchar_t *num;
+ int wid;
+ int x;
+
+ if (pdata->contents_entry == index_placeholder) {
+ num = index_page->number;
+ } else {
+ assert(pdata->contents_entry->private_data);
+ target = (para_data *)pdata->contents_entry->private_data;
+ num = target->first->page->number;
+ }
+
+ w = fake_word(num);
+ wid = paper_width_simple(pdata, w, conf);
+ sfree(w);
+
+ for (x = 0; x < conf->base_width; x += conf->leader_separation)
+ if (x - conf->leader_separation > last_x - conf->left_margin &&
+ x + conf->leader_separation < conf->base_width - wid)
+ render_string(pdata->last->page,
+ pdata->fonts[FONT_NORMAL],
+ pdata->sizes[FONT_NORMAL],
+ conf->left_margin + x,
+ (conf->paper_height - conf->top_margin -
+ pdata->last->ypos), L".", 0);
+
+ render_string(pdata->last->page,
+ pdata->fonts[FONT_NORMAL],
+ pdata->sizes[FONT_NORMAL],
+ conf->paper_width - conf->right_margin - wid,
+ (conf->paper_height - conf->top_margin -
+ pdata->last->ypos), num, 0);
+ }
+
+ /*
+ * Render any rectangle (chapter title underline or rule)
+ * that goes with this paragraph.
+ */
+ switch (pdata->rect_type) {
+ case RECT_CHAPTER_UNDERLINE:
+ add_rect_to_page(pdata->last->page,
+ conf->left_margin,
+ (conf->paper_height - conf->top_margin -
+ pdata->last->ypos -
+ conf->chapter_underline_depth),
+ conf->base_width,
+ conf->chapter_underline_thickness);
+ break;
+ case RECT_RULE:
+ add_rect_to_page(pdata->first->page,
+ conf->left_margin + pdata->first->xpos,
+ (conf->paper_height - conf->top_margin -
+ pdata->last->ypos -
+ pdata->last->line_height),
+ conf->base_width - pdata->first->xpos,
+ pdata->last->line_height);
+ break;
+ default: /* placate gcc */
+ break;
+ }
+}
+
+static para_data *code_paragraph(int indent, word *words, paper_conf *conf)
+{
+ para_data *pdata = snew(para_data);
+
+ /*
+ * For code paragraphs, I'm going to hack grievously and
+ * pretend the three normal fonts are the three code paragraph
+ * fonts.
+ */
+ setfont(pdata, &conf->fcode);
+
+ pdata->first = pdata->last = NULL;
+ pdata->outline_level = -1;
+ pdata->rect_type = RECT_NONE;
+ pdata->contents_entry = NULL;
+ pdata->justification = LEFT;
+ pdata->extraflags = RS_NOLIG;
+
+ for (; words; words = words->next) {
+ wchar_t *t, *e, *start;
+ word *lhead = NULL, *ltail = NULL, *w;
+ line_data *ldata;
+ int prev = -1, curr;
+
+ t = words->text;
+ if (words->next && words->next->type == word_Emph) {
+ e = words->next->text;
+ words = words->next;
+ } else
+ e = NULL;
+
+ start = t;
+
+ while (*start) {
+ while (*t) {
+ if (!e || !*e)
+ curr = 0;
+ else if (*e == L'i')
+ curr = 1;
+ else if (*e == L'b')
+ curr = 2;
+ else
+ curr = 0;
+
+ if (prev < 0)
+ prev = curr;
+
+ if (curr != prev)
+ break;
+
+ t++;
+ if (e && *e)
+ e++;
+ }
+
+ /*
+ * We've isolated a maximal subsequence of the line
+ * which has the same emphasis. Form it into a word
+ * structure.
+ */
+ w = snew(word);
+ w->next = NULL;
+ w->alt = NULL;
+ w->type = (prev == 0 ? word_WeakCode :
+ prev == 1 ? word_Emph : word_Normal);
+ w->text = snewn(t-start+1, wchar_t);
+ memcpy(w->text, start, (t-start) * sizeof(wchar_t));
+ w->text[t-start] = '\0';
+ w->breaks = FALSE;
+
+ if (ltail)
+ ltail->next = w;
+ else
+ lhead = w;
+ ltail = w;
+
+ start = t;
+ prev = -1;
+ }
+
+ ldata = snew(line_data);
+
+ ldata->pdata = pdata;
+ ldata->first = lhead;
+ ldata->end = NULL;
+ ldata->line_height = conf->fcode.font_size * UNITS_PER_PT;
+
+ ldata->xpos = indent;
+
+ if (pdata->last) {
+ pdata->last->next = ldata;
+ ldata->prev = pdata->last;
+ } else {
+ pdata->first = ldata;
+ ldata->prev = NULL;
+ }
+ ldata->next = NULL;
+ pdata->last = ldata;
+
+ ldata->hshortfall = 0;
+ ldata->nspaces = 0;
+ ldata->aux_text = NULL;
+ ldata->aux_text_2 = NULL;
+ ldata->aux_left_indent = 0;
+ /* General opprobrium for breaking in a code paragraph. */
+ ldata->penalty_before = ldata->penalty_after = 50000;
+ }
+
+ standard_line_spacing(pdata, conf);
+
+ return pdata;
+}
+
+static para_data *rule_paragraph(int indent, paper_conf *conf)
+{
+ para_data *pdata = snew(para_data);
+ line_data *ldata;
+
+ ldata = snew(line_data);
+
+ ldata->pdata = pdata;
+ ldata->first = NULL;
+ ldata->end = NULL;
+ ldata->line_height = conf->rule_thickness;
+
+ ldata->xpos = indent;
+
+ ldata->prev = NULL;
+ ldata->next = NULL;
+
+ ldata->hshortfall = 0;
+ ldata->nspaces = 0;
+ ldata->aux_text = NULL;
+ ldata->aux_text_2 = NULL;
+ ldata->aux_left_indent = 0;
+
+ /*
+ * Better to break after a rule than before it
+ */
+ ldata->penalty_after += 100000;
+ ldata->penalty_before += -100000;
+
+ pdata->first = pdata->last = ldata;
+ pdata->outline_level = -1;
+ pdata->rect_type = RECT_RULE;
+ pdata->contents_entry = NULL;
+ pdata->justification = LEFT;
+ pdata->extraflags = 0;
+
+ standard_line_spacing(pdata, conf);
+
+ return pdata;
+}
+
+/*
+ * Plain-text-like formatting for outline titles.
+ */
+static void paper_rdaddw(rdstring *rs, word *text) {
+ for (; text; text = text->next) switch (text->type) {
+ case word_HyperLink:
+ case word_HyperEnd:
+ case word_UpperXref:
+ case word_LowerXref:
+ case word_XrefEnd:
+ case word_IndexRef:
+ break;
+
+ case word_Normal:
+ case word_Emph:
+ case word_Code:
+ case word_WeakCode:
+ case word_WhiteSpace:
+ case word_EmphSpace:
+ case word_CodeSpace:
+ case word_WkCodeSpace:
+ case word_Quote:
+ case word_EmphQuote:
+ case word_CodeQuote:
+ case word_WkCodeQuote:
+ assert(text->type != word_CodeQuote &&
+ text->type != word_WkCodeQuote);
+ if (towordstyle(text->type) == word_Emph &&
+ (attraux(text->aux) == attr_First ||
+ attraux(text->aux) == attr_Only))
+ rdadd(rs, L'_'); /* FIXME: configurability */
+ else if (towordstyle(text->type) == word_Code &&
+ (attraux(text->aux) == attr_First ||
+ attraux(text->aux) == attr_Only))
+ rdadd(rs, L'\''); /* FIXME: configurability */
+ if (removeattr(text->type) == word_Normal) {
+ rdadds(rs, text->text);
+ } else if (removeattr(text->type) == word_WhiteSpace) {
+ rdadd(rs, L' ');
+ } else if (removeattr(text->type) == word_Quote) {
+ rdadd(rs, L'\''); /* fixme: configurability */
+ }
+ if (towordstyle(text->type) == word_Emph &&
+ (attraux(text->aux) == attr_Last ||
+ attraux(text->aux) == attr_Only))
+ rdadd(rs, L'_'); /* FIXME: configurability */
+ else if (towordstyle(text->type) == word_Code &&
+ (attraux(text->aux) == attr_Last ||
+ attraux(text->aux) == attr_Only))
+ rdadd(rs, L'\''); /* FIXME: configurability */
+ break;
+ }
+}
+
+static wchar_t *prepare_outline_title(word *first, wchar_t *separator,
+ word *second)
+{
+ rdstring rs = {0, 0, NULL};
+
+ if (first)
+ paper_rdaddw(&rs, first);
+ if (separator)
+ rdadds(&rs, separator);
+ if (second)
+ paper_rdaddw(&rs, second);
+
+ return rs.text;
+}
+
+static word *fake_word(wchar_t *text)
+{
+ word *ret = snew(word);
+ ret->next = NULL;
+ ret->alt = NULL;
+ ret->type = word_Normal;
+ ret->text = ustrdup(text);
+ ret->breaks = FALSE;
+ ret->aux = 0;
+ return ret;
+}
+
+static word *fake_space_word(void)
+{
+ word *ret = snew(word);
+ ret->next = NULL;
+ ret->alt = NULL;
+ ret->type = word_WhiteSpace;
+ ret->text = NULL;
+ ret->breaks = TRUE;
+ ret->aux = 0;
+ return ret;
+}
+
+static word *fake_page_ref(page_data *page)
+{
+ word *ret = snew(word);
+ ret->next = NULL;
+ ret->alt = NULL;
+ ret->type = word_PageXref;
+ ret->text = NULL;
+ ret->breaks = FALSE;
+ ret->aux = 0;
+ ret->private_data = page;
+ return ret;
+}
+
+static word *fake_end_ref(void)
+{
+ word *ret = snew(word);
+ ret->next = NULL;
+ ret->alt = NULL;
+ ret->type = word_XrefEnd;
+ ret->text = NULL;
+ ret->breaks = FALSE;
+ ret->aux = 0;
+ return ret;
+}
+
+static word *prepare_contents_title(word *first, wchar_t *separator,
+ word *second)
+{
+ word *ret;
+ word **wptr, *w;
+
+ wptr = &ret;
+
+ if (first) {
+ w = dup_word_list(first);
+ *wptr = w;
+ while (w->next)
+ w = w->next;
+ wptr = &w->next;
+ }
+
+ if (separator) {
+ w = fake_word(separator);
+ *wptr = w;
+ wptr = &w->next;
+ }
+
+ if (second) {
+ *wptr = dup_word_list(second);
+ }
+
+ return ret;
+}
+
+static void fold_into_page(page_data *dest, page_data *src, int right_shift)
+{
+ line_data *ldata;
+
+ if (!src->first_line)
+ return;
+
+ if (dest->last_line) {
+ dest->last_line->next = src->first_line;
+ src->first_line->prev = dest->last_line;
+ }
+ dest->last_line = src->last_line;
+
+ for (ldata = src->first_line; ldata; ldata = ldata->next) {
+ ldata->page = dest;
+ ldata->xpos += right_shift;
+
+ if (ldata == src->last_line)
+ break;
+ }
+}