[sgt/halibut] / bk_text.c

/*
 * text backend for Halibut
 */

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "halibut.h"

typedef enum { LEFT, LEFTPLUS, CENTRE } alignment;
typedef struct {
    alignment align;
    int just_numbers;
    wchar_t underline;
    wchar_t *number_suffix;
} alignstruct;

typedef struct {
    int indent, indent_code;
    int listindentbefore, listindentafter;
    int width;
    alignstruct atitle, achapter, *asect;
    int nasect;
    int include_version_id;
    int indent_preambles;
    word bullet;
    char *filename;
} textconfig;

static int text_convert(wchar_t *, char **);

static void text_heading(FILE *, word *, word *, word *, alignstruct, int,int);
static void text_rule(FILE *, int, int);
static void text_para(FILE *, word *, char *, word *, int, int, int);
static void text_codepara(FILE *, word *, int, int);
static void text_versionid(FILE *, word *);

static alignment utoalign(wchar_t *p) {
    if (!ustricmp(p, L"centre") || !ustricmp(p, L"center"))
	return CENTRE;
    if (!ustricmp(p, L"leftplus"))
	return LEFTPLUS;
    return LEFT;
}

static textconfig text_configure(paragraph *source) {
    textconfig ret;

    /*
     * Non-negotiables.
     */
    ret.bullet.next = NULL;
    ret.bullet.alt = NULL;
    ret.bullet.type = word_Normal;
    ret.atitle.just_numbers = FALSE;   /* ignored */

    /*
     * Defaults.
     */
    ret.indent = 7;
    ret.indent_code = 2;
    ret.listindentbefore = 1;
    ret.listindentafter = 3;
    ret.width = 68;
    ret.atitle.align = CENTRE;
    ret.atitle.underline = L'=';
    ret.achapter.align = LEFT;
    ret.achapter.just_numbers = FALSE;
    ret.achapter.number_suffix = L": ";
    ret.achapter.underline = L'-';
    ret.nasect = 1;
    ret.asect = mknewa(alignstruct, ret.nasect);
    ret.asect[0].align = LEFTPLUS;
    ret.asect[0].just_numbers = TRUE;
    ret.asect[0].number_suffix = L" ";
    ret.asect[0].underline = L'\0';
    ret.include_version_id = TRUE;
    ret.indent_preambles = FALSE;
    ret.bullet.text = L"-";
    ret.filename = dupstr("output.txt");

    for (; source; source = source->next) {
	if (source->type == para_Config) {
	    if (!ustricmp(source->keyword, L"text-indent")) {
		ret.indent = utoi(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-filename")) {
		sfree(ret.filename);
		ret.filename = dupstr(adv(source->origkeyword));
	    } else if (!ustricmp(source->keyword, L"text-indent-code")) {
		ret.indent_code = utoi(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-width")) {
		ret.width = utoi(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-list-indent")) {
		ret.listindentbefore = utoi(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-listitem-indent")) {
		ret.listindentafter = utoi(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-chapter-align")) {
		ret.achapter.align = utoalign(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-chapter-underline")) {
		ret.achapter.underline = *uadv(source->keyword);
	    } else if (!ustricmp(source->keyword, L"text-chapter-numeric")) {
		ret.achapter.just_numbers = utob(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-chapter-suffix")) {
		ret.achapter.number_suffix = uadv(source->keyword);
	    } else if (!ustricmp(source->keyword, L"text-section-align")) {
		wchar_t *p = uadv(source->keyword);
		int n = 0;
		if (uisdigit(*p)) {
		    n = utoi(p);
		    p = uadv(p);
		}
		if (n >= ret.nasect) {
		    int i;
		    ret.asect = resize(ret.asect, n+1);
		    for (i = ret.nasect; i <= n; i++)
			ret.asect[i] = ret.asect[ret.nasect-1];
		    ret.nasect = n+1;
		}
		ret.asect[n].align = utoalign(p);
	    } else if (!ustricmp(source->keyword, L"text-section-underline")) {
		wchar_t *p = uadv(source->keyword);
		int n = 0;
		if (uisdigit(*p)) {
		    n = utoi(p);
		    p = uadv(p);
		}
		if (n >= ret.nasect) {
		    int i;
		    ret.asect = resize(ret.asect, n+1);
		    for (i = ret.nasect; i <= n; i++)
			ret.asect[i] = ret.asect[ret.nasect-1];
		    ret.nasect = n+1;
		}
		ret.asect[n].underline = *p;
	    } else if (!ustricmp(source->keyword, L"text-section-numeric")) {
		wchar_t *p = uadv(source->keyword);
		int n = 0;
		if (uisdigit(*p)) {
		    n = utoi(p);
		    p = uadv(p);
		}
		if (n >= ret.nasect) {
		    int i;
		    ret.asect = resize(ret.asect, n+1);
		    for (i = ret.nasect; i <= n; i++)
			ret.asect[i] = ret.asect[ret.nasect-1];
		    ret.nasect = n+1;
		}
		ret.asect[n].just_numbers = utob(p);
	    } else if (!ustricmp(source->keyword, L"text-section-suffix")) {
		wchar_t *p = uadv(source->keyword);
		int n = 0;
		if (uisdigit(*p)) {
		    n = utoi(p);
		    p = uadv(p);
		}
		if (n >= ret.nasect) {
		    int i;
		    ret.asect = resize(ret.asect, n+1);
		    for (i = ret.nasect; i <= n; i++) {
			ret.asect[i] = ret.asect[ret.nasect-1];
		    }
		    ret.nasect = n+1;
		}
		ret.asect[n].number_suffix = p;
	    } else if (!ustricmp(source->keyword, L"text-title-align")) {
		ret.atitle.align = utoalign(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-title-underline")) {
		ret.atitle.underline = *uadv(source->keyword);
	    } else if (!ustricmp(source->keyword, L"text-versionid")) {
		ret.include_version_id = utob(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-indent-preamble")) {
		ret.indent_preambles = utob(uadv(source->keyword));
	    } else if (!ustricmp(source->keyword, L"text-bullet")) {
		ret.bullet.text = uadv(source->keyword);
	    }
	}
    }

    return ret;
}

paragraph *text_config_filename(char *filename)
{
    return cmdline_cfg_simple("text-filename", filename, NULL);
}

void text_backend(paragraph *sourceform, keywordlist *keywords,
		  indexdata *idx, void *unused) {
    paragraph *p;
    textconfig conf;
    word *prefix, *body, *wp;
    word spaceword;
    FILE *fp;
    char *prefixextra;
    int nesting, nestindent;
    int indentb, indenta;

    IGNORE(unused);
    IGNORE(keywords);		       /* we don't happen to need this */
    IGNORE(idx);		       /* or this */

    conf = text_configure(sourceform);

    /*
     * Open the output file.
     */
    fp = fopen(conf.filename, "w");
    if (!fp) {
	error(err_cantopenw, conf.filename);
	return;
    }

    /* Do the title */
    for (p = sourceform; p; p = p->next)
	if (p->type == para_Title)
	    text_heading(fp, NULL, NULL, p->words,
			 conf.atitle, conf.indent, conf.width);

    nestindent = conf.listindentbefore + conf.listindentafter;
    nesting = (conf.indent_preambles ? 0 : -conf.indent);

    /* Do the main document */
    for (p = sourceform; p; p = p->next) switch (p->type) {

      case para_QuotePush:
	nesting += 2;
	break;
      case para_QuotePop:
	nesting -= 2;
	assert(nesting >= 0);
	break;

      case para_LcontPush:
	nesting += nestindent;
	break;
      case para_LcontPop:
	nesting -= nestindent;
	assert(nesting >= 0);
	break;

	/*
	 * Things we ignore because we've already processed them or
	 * aren't going to touch them in this pass.
	 */
      case para_IM:
      case para_BR:
      case para_Biblio:		       /* only touch BiblioCited */
      case para_VersionID:
      case para_NoCite:
      case para_Title:
	break;

	/*
	 * Chapter titles.
	 */
      case para_Chapter:
      case para_Appendix:
      case para_UnnumberedChapter:
	text_heading(fp, p->kwtext, p->kwtext2, p->words,
		     conf.achapter, conf.indent, conf.width);
	nesting = 0;
	break;

      case para_Heading:
      case para_Subsect:
	text_heading(fp, p->kwtext, p->kwtext2, p->words,
		     conf.asect[p->aux>=conf.nasect ? conf.nasect-1 : p->aux],
		     conf.indent, conf.width);
	break;

      case para_Rule:
	text_rule(fp, conf.indent + nesting, conf.width - nesting);
	break;

      case para_Normal:
      case para_Copyright:
      case para_DescribedThing:
      case para_Description:
      case para_BiblioCited:
      case para_Bullet:
      case para_NumberedList:
	if (p->type == para_Bullet) {
	    prefix = &conf.bullet;
	    prefixextra = NULL;
	    indentb = conf.listindentbefore;
	    indenta = conf.listindentafter;
	} else if (p->type == para_NumberedList) {
	    prefix = p->kwtext;
	    prefixextra = ".";	       /* FIXME: configurability */
	    indentb = conf.listindentbefore;
	    indenta = conf.listindentafter;
	} else if (p->type == para_Description) {
	    prefix = NULL;
	    prefixextra = NULL;
	    indentb = conf.listindentbefore;
	    indenta = conf.listindentafter;
	} else {
	    prefix = NULL;
	    prefixextra = NULL;
	    indentb = indenta = 0;
	}
	if (p->type == para_BiblioCited) {
	    body = dup_word_list(p->kwtext);
	    for (wp = body; wp->next; wp = wp->next);
	    wp->next = &spaceword;
	    spaceword.next = p->words;
	    spaceword.alt = NULL;
	    spaceword.type = word_WhiteSpace;
	    spaceword.text = NULL;
	} else {
	    wp = NULL;
	    body = p->words;
	}
	text_para(fp, prefix, prefixextra, body,
		  conf.indent + nesting + indentb, indenta,
		  conf.width - nesting - indentb - indenta);
	if (wp) {
	    wp->next = NULL;
	    free_word_list(body);
	}
	break;

      case para_Code:
	text_codepara(fp, p->words,
		      conf.indent + nesting + conf.indent_code,
		      conf.width - nesting - 2 * conf.indent_code);
	break;
    }

    /* Do the version ID */
    if (conf.include_version_id) {
	for (p = sourceform; p; p = p->next)
	    if (p->type == para_VersionID)
 		text_versionid(fp, p->words);
    }

    /*
     * Tidy up
     */
    fclose(fp);
    sfree(conf.asect);
    sfree(conf.filename);
}

/*
 * Convert a wide string into a string of chars. If `result' is
 * non-NULL, mallocs the resulting string and stores a pointer to
 * it in `*result'. If `result' is NULL, merely checks whether all
 * characters in the string are feasible for the output character
 * set.
 *
 * Return is nonzero if all characters are OK. If not all
 * characters are OK but `result' is non-NULL, a result _will_
 * still be generated!
 */
static int text_convert(wchar_t *s, char **result) {
    /*
     * FIXME. Currently this is ISO8859-1 only.
     */
    int doing = (result != 0);
    int ok = TRUE;
    char *p = NULL;
    int plen = 0, psize = 0;

    for (; *s; s++) {
	wchar_t c = *s;
	char outc;

	if ((c >= 32 && c <= 126) ||
	    (c >= 160 && c <= 255)) {
	    /* Char is OK. */
	    outc = (char)c;
	} else {
	    /* Char is not OK. */
	    ok = FALSE;
	    outc = 0xBF;	       /* approximate the good old DEC `uh?' */
	}
	if (doing) {
	    if (plen >= psize) {
		psize = plen + 256;
		p = resize(p, psize);
	    }
	    p[plen++] = outc;
	}
    }
    if (doing) {
	p = resize(p, plen+1);
	p[plen] = '\0';
	*result = p;
    }
    return ok;
}

static void text_rdaddwc(rdstringc *rs, word *text, word *end) {
    char *c;

    for (; text && text != end; 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))
	    rdaddc(rs, '_');	       /* FIXME: configurability */
	else if (towordstyle(text->type) == word_Code &&
		 (attraux(text->aux) == attr_First ||
		  attraux(text->aux) == attr_Only))
	    rdaddc(rs, '`');	       /* FIXME: configurability */
	if (removeattr(text->type) == word_Normal) {
	    if (text_convert(text->text, &c) || !text->alt)
		rdaddsc(rs, c);
	    else
		text_rdaddwc(rs, text->alt, NULL);
	    sfree(c);
	} else if (removeattr(text->type) == word_WhiteSpace) {
	    rdaddc(rs, ' ');
	} else if (removeattr(text->type) == word_Quote) {
	    rdaddc(rs, quoteaux(text->aux) == quote_Open ? '`' : '\'');
				       /* FIXME: configurability */
	}
	if (towordstyle(text->type) == word_Emph &&
	    (attraux(text->aux) == attr_Last ||
	     attraux(text->aux) == attr_Only))
	    rdaddc(rs, '_');	       /* FIXME: configurability */
	else if (towordstyle(text->type) == word_Code &&
		 (attraux(text->aux) == attr_Last ||
		  attraux(text->aux) == attr_Only))
	    rdaddc(rs, '\'');	       /* FIXME: configurability */
	break;
    }
}

static int text_width(void *, word *);

static int text_width_list(void *ctx, word *text) {
    int w = 0;
    while (text) {
	w += text_width(ctx, text);
	text = text->next;
    }
    return w;
}

static int text_width(void *ctx, word *text) {
    IGNORE(ctx);

    switch (text->type) {
      case word_HyperLink:
      case word_HyperEnd:
      case word_UpperXref:
      case word_LowerXref:
      case word_XrefEnd:
      case word_IndexRef:
	return 0;

      case word_Normal:
      case word_Emph:
      case word_Code:
      case word_WeakCode:
	return (((text->type == word_Emph ||
		  text->type == word_Code)
		 ? (attraux(text->aux) == attr_Only ? 2 :
		    attraux(text->aux) == attr_Always ? 0 : 1)
		 : 0) +
		(text_convert(text->text, NULL) || !text->alt ?
		 ustrlen(text->text) :
		 text_width_list(ctx, text->alt)));

      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);
	return (((towordstyle(text->type) == word_Emph ||
		  towordstyle(text->type) == word_Code)
		 ? (attraux(text->aux) == attr_Only ? 2 :
		    attraux(text->aux) == attr_Always ? 0 : 1)
		 : 0) + 1);
    }
    return 0;			       /* should never happen */
}

static void text_heading(FILE *fp, word *tprefix, word *nprefix, word *text,
			 alignstruct align, int indent, int width) {
    rdstringc t = { 0, 0, NULL };
    int margin, length;
    int firstlinewidth, wrapwidth;
    wrappedline *wrapping, *p;

    if (align.just_numbers && nprefix) {
	char *c;
	text_rdaddwc(&t, nprefix, NULL);
	if (text_convert(align.number_suffix, &c)) {
	    rdaddsc(&t, c);
	    sfree(c);
	}
    } else if (!align.just_numbers && tprefix) {
	char *c;
	text_rdaddwc(&t, tprefix, NULL);
	if (text_convert(align.number_suffix, &c)) {
	    rdaddsc(&t, c);
	    sfree(c);
	}
    }
    margin = length = (t.text ? strlen(t.text) : 0);

    if (align.align == LEFTPLUS) {
	margin = indent - margin;
	if (margin < 0) margin = 0;
	firstlinewidth = indent + width - margin - length;
	wrapwidth = width;
    } else if (align.align == LEFT || align.align == CENTRE) {
	margin = 0;
	firstlinewidth = indent + width - length;
	wrapwidth = indent + width;
    }

    wrapping = wrap_para(text, firstlinewidth, wrapwidth, text_width, NULL, 0);
    for (p = wrapping; p; p = p->next) {
	text_rdaddwc(&t, p->begin, p->end);
	length = (t.text ? strlen(t.text) : 0);
	if (align.align == CENTRE) {
	    margin = (indent + width - length)/2;
	    if (margin < 0) margin = 0;
	}
	fprintf(fp, "%*s%s\n", margin, "", t.text);
	if (align.underline != L'\0') {
	    char *u, uc;
	    wchar_t uw[2];
	    uw[0] = align.underline; uw[1] = L'\0';
	    text_convert(uw, &u);
	    uc = u[0];
	    sfree(u);
	    fprintf(fp, "%*s", margin, "");
	    while (length--)
		putc(uc, fp);
	    putc('\n', fp);
	}
	if (align.align == LEFTPLUS)
	    margin = indent;
	else
	    margin = 0;
	sfree(t.text);
	t = empty_rdstringc;
    }
    wrap_free(wrapping);
    putc('\n', fp);

    sfree(t.text);
}

static void text_rule(FILE *fp, int indent, int width) {
    while (indent--) putc(' ', fp);
    while (width--) putc('-', fp);     /* FIXME: configurability! */
    putc('\n', fp);
    putc('\n', fp);
}

static void text_para(FILE *fp, word *prefix, char *prefixextra, word *text,
		      int indent, int extraindent, int width) {
    wrappedline *wrapping, *p;
    rdstringc pfx = { 0, 0, NULL };
    int e;
    int firstlinewidth = width;

    if (prefix) {
	text_rdaddwc(&pfx, prefix, NULL);
	if (prefixextra)
	    rdaddsc(&pfx, prefixextra);
	fprintf(fp, "%*s%s", indent, "", pfx.text);
	/* If the prefix is too long, shorten the first line to fit. */
	e = extraindent - strlen(pfx.text);
	if (e < 0) {
	    firstlinewidth += e;       /* this decreases it, since e < 0 */
	    if (firstlinewidth < 0) {
		e = indent + extraindent;
		firstlinewidth = width;
		fprintf(fp, "\n");
	    } else
		e = 0;
	}
	sfree(pfx.text);
    } else
	e = indent + extraindent;

    wrapping = wrap_para(text, firstlinewidth, width, text_width, NULL, 0);
    for (p = wrapping; p; p = p->next) {
	rdstringc t = { 0, 0, NULL };
	text_rdaddwc(&t, p->begin, p->end);
	fprintf(fp, "%*s%s\n", e, "", t.text);
	e = indent + extraindent;
	sfree(t.text);
    }
    wrap_free(wrapping);
    putc('\n', fp);
}

static void text_codepara(FILE *fp, word *text, int indent, int width) {
    for (; text; text = text->next) if (text->type == word_WeakCode) {
	char *c;
	text_convert(text->text, &c);
	if (strlen(c) > (size_t)width) {
	    /* FIXME: warn */
	}
	fprintf(fp, "%*s%s\n", indent, "", c);
	sfree(c);
    }

    putc('\n', fp);
}

static void text_versionid(FILE *fp, word *text) {
    rdstringc t = { 0, 0, NULL };

    rdaddc(&t, '[');		       /* FIXME: configurability */
    text_rdaddwc(&t, text, NULL);
    rdaddc(&t, ']');		       /* FIXME: configurability */

    fprintf(fp, "%s\n", t.text);
    sfree(t.text);
}
Commit	Line	Data
d7482997	1	/*
	2	* text backend for Halibut
	3	*/
	4
	5	#include <stdio.h>
	6	#include <stdlib.h>
	7	#include <assert.h>
	8	#include "halibut.h"
	9
	10	typedef enum { LEFT, LEFTPLUS, CENTRE } alignment;
	11	typedef struct {
	12	alignment align;
	13	int just_numbers;
	14	wchar_t underline;
63223c78	15	wchar_t *number_suffix;
d7482997	16	} alignstruct;
	17
	18	typedef struct {
	19	int indent, indent_code;
	20	int listindentbefore, listindentafter;
	21	int width;
	22	alignstruct atitle, achapter, *asect;
	23	int nasect;
	24	int include_version_id;
	25	int indent_preambles;
	26	word bullet;
50d6b4bd	27	char *filename;
d7482997	28	} textconfig;
	29
	30	static int text_convert(wchar_t , char *);
	31
	32	static void text_heading(FILE , word , word , word , alignstruct, int,int);
	33	static void text_rule(FILE *, int, int);
	34	static void text_para(FILE , word , char , word , int, int, int);
	35	static void text_codepara(FILE , word , int, int);
	36	static void text_versionid(FILE , word );
	37
	38	static alignment utoalign(wchar_t *p) {
	39	if (!ustricmp(p, L"centre") \|\| !ustricmp(p, L"center"))
	40	return CENTRE;
	41	if (!ustricmp(p, L"leftplus"))
	42	return LEFTPLUS;
	43	return LEFT;
	44	}
	45
	46	static textconfig text_configure(paragraph *source) {
	47	textconfig ret;
	48
	49	/*
	50	* Non-negotiables.
	51	*/
	52	ret.bullet.next = NULL;
	53	ret.bullet.alt = NULL;
	54	ret.bullet.type = word_Normal;
	55	ret.atitle.just_numbers = FALSE; /* ignored */
	56
	57	/*
	58	* Defaults.
	59	*/
	60	ret.indent = 7;
	61	ret.indent_code = 2;
	62	ret.listindentbefore = 1;
	63	ret.listindentafter = 3;
	64	ret.width = 68;
	65	ret.atitle.align = CENTRE;
	66	ret.atitle.underline = L'=';
	67	ret.achapter.align = LEFT;
	68	ret.achapter.just_numbers = FALSE;
e5e6bf9d	69	ret.achapter.number_suffix = L": ";
d7482997	70	ret.achapter.underline = L'-';
	71	ret.nasect = 1;
	72	ret.asect = mknewa(alignstruct, ret.nasect);
	73	ret.asect[0].align = LEFTPLUS;
	74	ret.asect[0].just_numbers = TRUE;
e5e6bf9d	75	ret.asect[0].number_suffix = L" ";
d7482997	76	ret.asect[0].underline = L'\0';
	77	ret.include_version_id = TRUE;
	78	ret.indent_preambles = FALSE;
e5e6bf9d	79	ret.bullet.text = L"-";
50d6b4bd	80	ret.filename = dupstr("output.txt");
d7482997	81
	82	for (; source; source = source->next) {
	83	if (source->type == para_Config) {
	84	if (!ustricmp(source->keyword, L"text-indent")) {
	85	ret.indent = utoi(uadv(source->keyword));
50d6b4bd	86	} else if (!ustricmp(source->keyword, L"text-filename")) {
50d6b4bd	87	sfree(ret.filename);
e4ea58f8	88	ret.filename = dupstr(adv(source->origkeyword));
d7482997	89	} else if (!ustricmp(source->keyword, L"text-indent-code")) {
	90	ret.indent_code = utoi(uadv(source->keyword));
	91	} else if (!ustricmp(source->keyword, L"text-width")) {
	92	ret.width = utoi(uadv(source->keyword));
	93	} else if (!ustricmp(source->keyword, L"text-list-indent")) {
	94	ret.listindentbefore = utoi(uadv(source->keyword));
	95	} else if (!ustricmp(source->keyword, L"text-listitem-indent")) {
	96	ret.listindentafter = utoi(uadv(source->keyword));
	97	} else if (!ustricmp(source->keyword, L"text-chapter-align")) {
	98	ret.achapter.align = utoalign(uadv(source->keyword));
	99	} else if (!ustricmp(source->keyword, L"text-chapter-underline")) {
	100	ret.achapter.underline = *uadv(source->keyword);
	101	} else if (!ustricmp(source->keyword, L"text-chapter-numeric")) {
c83c6495	102	ret.achapter.just_numbers = utob(uadv(source->keyword));
63223c78	103	} else if (!ustricmp(source->keyword, L"text-chapter-suffix")) {
e5e6bf9d	104	ret.achapter.number_suffix = uadv(source->keyword);
d7482997	105	} else if (!ustricmp(source->keyword, L"text-section-align")) {
	106	wchar_t *p = uadv(source->keyword);
	107	int n = 0;
	108	if (uisdigit(*p)) {
	109	n = utoi(p);
	110	p = uadv(p);
	111	}
	112	if (n >= ret.nasect) {
	113	int i;
	114	ret.asect = resize(ret.asect, n+1);
	115	for (i = ret.nasect; i <= n; i++)
	116	ret.asect[i] = ret.asect[ret.nasect-1];
	117	ret.nasect = n+1;
	118	}
	119	ret.asect[n].align = utoalign(p);
	120	} else if (!ustricmp(source->keyword, L"text-section-underline")) {
	121	wchar_t *p = uadv(source->keyword);
	122	int n = 0;
	123	if (uisdigit(*p)) {
	124	n = utoi(p);
	125	p = uadv(p);
	126	}
	127	if (n >= ret.nasect) {
	128	int i;
	129	ret.asect = resize(ret.asect, n+1);
	130	for (i = ret.nasect; i <= n; i++)
	131	ret.asect[i] = ret.asect[ret.nasect-1];
	132	ret.nasect = n+1;
	133	}
	134	ret.asect[n].underline = *p;
	135	} else if (!ustricmp(source->keyword, L"text-section-numeric")) {
	136	wchar_t *p = uadv(source->keyword);
	137	int n = 0;
	138	if (uisdigit(*p)) {
	139	n = utoi(p);
	140	p = uadv(p);
	141	}
	142	if (n >= ret.nasect) {
	143	int i;
	144	ret.asect = resize(ret.asect, n+1);
	145	for (i = ret.nasect; i <= n; i++)
	146	ret.asect[i] = ret.asect[ret.nasect-1];
	147	ret.nasect = n+1;
	148	}
	149	ret.asect[n].just_numbers = utob(p);
63223c78	150	} else if (!ustricmp(source->keyword, L"text-section-suffix")) {
	151	wchar_t *p = uadv(source->keyword);
	152	int n = 0;
	153	if (uisdigit(*p)) {
	154	n = utoi(p);
	155	p = uadv(p);
	156	}
	157	if (n >= ret.nasect) {
	158	int i;
	159	ret.asect = resize(ret.asect, n+1);
e5e6bf9d	160	for (i = ret.nasect; i <= n; i++) {
63223c78	161	ret.asect[i] = ret.asect[ret.nasect-1];
e5e6bf9d	162	}
63223c78	163	ret.nasect = n+1;
63223c78	164	}
e5e6bf9d	165	ret.asect[n].number_suffix = p;
d7482997	166	} else if (!ustricmp(source->keyword, L"text-title-align")) {
	167	ret.atitle.align = utoalign(uadv(source->keyword));
	168	} else if (!ustricmp(source->keyword, L"text-title-underline")) {
	169	ret.atitle.underline = *uadv(source->keyword);
	170	} else if (!ustricmp(source->keyword, L"text-versionid")) {
	171	ret.include_version_id = utob(uadv(source->keyword));
	172	} else if (!ustricmp(source->keyword, L"text-indent-preamble")) {
	173	ret.indent_preambles = utob(uadv(source->keyword));
	174	} else if (!ustricmp(source->keyword, L"text-bullet")) {
	175	ret.bullet.text = uadv(source->keyword);
	176	}
	177	}
	178	}
	179
	180	return ret;
	181	}
	182
ba9c1487	183	paragraph text_config_filename(char filename)
ba9c1487	184	{
e4ea58f8	185	return cmdline_cfg_simple("text-filename", filename, NULL);
ba9c1487	186	}
ba9c1487	187
d7482997	188	void text_backend(paragraph sourceform, keywordlist keywords,
43341922	189	indexdata idx, void unused) {
d7482997	190	paragraph *p;
	191	textconfig conf;
	192	word prefix, body, *wp;
	193	word spaceword;
	194	FILE *fp;
	195	char *prefixextra;
7136a6c7	196	int nesting, nestindent;
d7482997	197	int indentb, indenta;
d7482997	198
43341922	199	IGNORE(unused);
d7482997	200	IGNORE(keywords); /* we don't happen to need this */
	201	IGNORE(idx); /* or this */
	202
	203	conf = text_configure(sourceform);
	204
	205	/*
50d6b4bd	206	* Open the output file.
d7482997	207	*/
50d6b4bd	208	fp = fopen(conf.filename, "w");
d7482997	209	if (!fp) {
50d6b4bd	210	error(err_cantopenw, conf.filename);
d7482997	211	return;
	212	}
	213
	214	/* Do the title */
	215	for (p = sourceform; p; p = p->next)
	216	if (p->type == para_Title)
	217	text_heading(fp, NULL, NULL, p->words,
	218	conf.atitle, conf.indent, conf.width);
	219
7136a6c7	220	nestindent = conf.listindentbefore + conf.listindentafter;
8902e0ed	221	nesting = (conf.indent_preambles ? 0 : -conf.indent);
7136a6c7	222
d7482997	223	/* Do the main document */
	224	for (p = sourceform; p; p = p->next) switch (p->type) {
	225
2614b01d	226	case para_QuotePush:
	227	nesting += 2;
	228	break;
	229	case para_QuotePop:
	230	nesting -= 2;
	231	assert(nesting >= 0);
	232	break;
	233
7136a6c7	234	case para_LcontPush:
2614b01d	235	nesting += nestindent;
7136a6c7	236	break;
7136a6c7	237	case para_LcontPop:
2614b01d	238	nesting -= nestindent;
2614b01d	239	assert(nesting >= 0);
7136a6c7	240	break;
7136a6c7	241
d7482997	242	/*
	243	* Things we ignore because we've already processed them or
	244	* aren't going to touch them in this pass.
	245	*/
	246	case para_IM:
	247	case para_BR:
	248	case para_Biblio: /* only touch BiblioCited */
	249	case para_VersionID:
d7482997	250	case para_NoCite:
	251	case para_Title:
	252	break;
	253
	254	/*
	255	* Chapter titles.
	256	*/
	257	case para_Chapter:
	258	case para_Appendix:
	259	case para_UnnumberedChapter:
	260	text_heading(fp, p->kwtext, p->kwtext2, p->words,
	261	conf.achapter, conf.indent, conf.width);
8902e0ed	262	nesting = 0;
d7482997	263	break;
	264
	265	case para_Heading:
	266	case para_Subsect:
	267	text_heading(fp, p->kwtext, p->kwtext2, p->words,
	268	conf.asect[p->aux>=conf.nasect ? conf.nasect-1 : p->aux],
	269	conf.indent, conf.width);
	270	break;
	271
	272	case para_Rule:
2614b01d	273	text_rule(fp, conf.indent + nesting, conf.width - nesting);
d7482997	274	break;
	275
	276	case para_Normal:
9057a0a8	277	case para_Copyright:
7136a6c7	278	case para_DescribedThing:
7136a6c7	279	case para_Description:
d7482997	280	case para_BiblioCited:
	281	case para_Bullet:
	282	case para_NumberedList:
	283	if (p->type == para_Bullet) {
	284	prefix = &conf.bullet;
	285	prefixextra = NULL;
	286	indentb = conf.listindentbefore;
	287	indenta = conf.listindentafter;
	288	} else if (p->type == para_NumberedList) {
	289	prefix = p->kwtext;
	290	prefixextra = "."; /* FIXME: configurability */
	291	indentb = conf.listindentbefore;
	292	indenta = conf.listindentafter;
7136a6c7	293	} else if (p->type == para_Description) {
	294	prefix = NULL;
	295	prefixextra = NULL;
	296	indentb = conf.listindentbefore;
	297	indenta = conf.listindentafter;
d7482997	298	} else {
	299	prefix = NULL;
	300	prefixextra = NULL;
	301	indentb = indenta = 0;
	302	}
	303	if (p->type == para_BiblioCited) {
	304	body = dup_word_list(p->kwtext);
	305	for (wp = body; wp->next; wp = wp->next);
	306	wp->next = &spaceword;
	307	spaceword.next = p->words;
	308	spaceword.alt = NULL;
	309	spaceword.type = word_WhiteSpace;
	310	spaceword.text = NULL;
	311	} else {
	312	wp = NULL;
	313	body = p->words;
	314	}
	315	text_para(fp, prefix, prefixextra, body,
2614b01d	316	conf.indent + nesting + indentb, indenta,
2614b01d	317	conf.width - nesting - indentb - indenta);
d7482997	318	if (wp) {
	319	wp->next = NULL;
	320	free_word_list(body);
	321	}
	322	break;
	323
	324	case para_Code:
7136a6c7	325	text_codepara(fp, p->words,
2614b01d	326	conf.indent + nesting + conf.indent_code,
2614b01d	327	conf.width - nesting - 2 * conf.indent_code);
d7482997	328	break;
	329	}
	330
	331	/* Do the version ID */
	332	if (conf.include_version_id) {
	333	for (p = sourceform; p; p = p->next)
	334	if (p->type == para_VersionID)
	335	text_versionid(fp, p->words);
	336	}
	337
	338	/*
	339	* Tidy up
	340	*/
	341	fclose(fp);
e5e6bf9d	342	sfree(conf.asect);
50d6b4bd	343	sfree(conf.filename);
d7482997	344	}
	345
	346	/*
	347	* Convert a wide string into a string of chars. If `result' is
	348	* non-NULL, mallocs the resulting string and stores a pointer to
	349	* it in `*result'. If `result' is NULL, merely checks whether all
	350	* characters in the string are feasible for the output character
	351	* set.
	352	*
	353	* Return is nonzero if all characters are OK. If not all
	354	* characters are OK but `result' is non-NULL, a result _will_
	355	* still be generated!
	356	*/
	357	static int text_convert(wchar_t s, char *result) {
	358	/*
	359	* FIXME. Currently this is ISO8859-1 only.
	360	*/
	361	int doing = (result != 0);
	362	int ok = TRUE;
	363	char *p = NULL;
	364	int plen = 0, psize = 0;
	365
	366	for (; *s; s++) {
	367	wchar_t c = *s;
	368	char outc;
	369
	370	if ((c >= 32 && c <= 126) \|\|
	371	(c >= 160 && c <= 255)) {
	372	/* Char is OK. */
	373	outc = (char)c;
	374	} else {
	375	/* Char is not OK. */
	376	ok = FALSE;
	377	outc = 0xBF; /* approximate the good old DEC `uh?' */
	378	}
	379	if (doing) {
	380	if (plen >= psize) {
	381	psize = plen + 256;
	382	p = resize(p, psize);
	383	}
	384	p[plen++] = outc;
	385	}
	386	}
	387	if (doing) {
	388	p = resize(p, plen+1);
	389	p[plen] = '\0';
	390	*result = p;
	391	}
	392	return ok;
	393	}
	394
	395	static void text_rdaddwc(rdstringc rs, word text, word *end) {
	396	char *c;
	397
	398	for (; text && text != end; text = text->next) switch (text->type) {
	399	case word_HyperLink:
	400	case word_HyperEnd:
	401	case word_UpperXref:
	402	case word_LowerXref:
	403	case word_XrefEnd:
	404	case word_IndexRef:
	405	break;
	406
	407	case word_Normal:
408	case word_Emph:
409	case word_Code:
410	case word_WeakCode:
411	case word_WhiteSpace:
412	case word_EmphSpace:
413	case word_CodeSpace:
414	case word_WkCodeSpace:
415	case word_Quote:
416	case word_EmphQuote:
417	case word_CodeQuote:
418	case word_WkCodeQuote:
419	assert(text->type != word_CodeQuote &&
420	text->type != word_WkCodeQuote);
421	if (towordstyle(text->type) == word_Emph &&
422	(attraux(text->aux) == attr_First \|\|
423	attraux(text->aux) == attr_Only))
424	rdaddc(rs, '_'); /* FIXME: configurability */
425	else if (towordstyle(text->type) == word_Code &&
426	(attraux(text->aux) == attr_First \|\|
427	attraux(text->aux) == attr_Only))
428	rdaddc(rs, '`'); /* FIXME: configurability */
429	if (removeattr(text->type) == word_Normal) {
12efc259	430	if (text_convert(text->text, &c) \|\| !text->alt)
d7482997	431	rdaddsc(rs, c);
	432	else
	433	text_rdaddwc(rs, text->alt, NULL);
	434	sfree(c);
	435	} else if (removeattr(text->type) == word_WhiteSpace) {
	436	rdaddc(rs, ' ');
	437	} else if (removeattr(text->type) == word_Quote) {
	438	rdaddc(rs, quoteaux(text->aux) == quote_Open ? '`' : '\'');
	439	/* FIXME: configurability */
	440	}
	441	if (towordstyle(text->type) == word_Emph &&
	442	(attraux(text->aux) == attr_Last \|\|
	443	attraux(text->aux) == attr_Only))
	444	rdaddc(rs, '_'); /* FIXME: configurability */
	445	else if (towordstyle(text->type) == word_Code &&
	446	(attraux(text->aux) == attr_Last \|\|
	447	attraux(text->aux) == attr_Only))
	448	rdaddc(rs, '\''); /* FIXME: configurability */
	449	break;
	450	}
	451	}
	452
43341922	453	static int text_width(void , word );
d7482997	454
43341922	455	static int text_width_list(void ctx, word text) {
d7482997	456	int w = 0;
d7482997	457	while (text) {
43341922	458	w += text_width(ctx, text);
d7482997	459	text = text->next;
	460	}
	461	return w;
	462	}
	463
43341922	464	static int text_width(void ctx, word text) {
	465	IGNORE(ctx);
	466
d7482997	467	switch (text->type) {
	468	case word_HyperLink:
	469	case word_HyperEnd:
	470	case word_UpperXref:
	471	case word_LowerXref:
	472	case word_XrefEnd:
	473	case word_IndexRef:
	474	return 0;
	475
	476	case word_Normal:
	477	case word_Emph:
	478	case word_Code:
	479	case word_WeakCode:
	480	return (((text->type == word_Emph \|\|
	481	text->type == word_Code)
	482	? (attraux(text->aux) == attr_Only ? 2 :
	483	attraux(text->aux) == attr_Always ? 0 : 1)
	484	: 0) +
12efc259	485	(text_convert(text->text, NULL) \|\| !text->alt ?
d7482997	486	ustrlen(text->text) :
43341922	487	text_width_list(ctx, text->alt)));
d7482997	488
	489	case word_WhiteSpace:
	490	case word_EmphSpace:
	491	case word_CodeSpace:
	492	case word_WkCodeSpace:
	493	case word_Quote:
	494	case word_EmphQuote:
	495	case word_CodeQuote:
	496	case word_WkCodeQuote:
	497	assert(text->type != word_CodeQuote &&
	498	text->type != word_WkCodeQuote);
	499	return (((towordstyle(text->type) == word_Emph \|\|
	500	towordstyle(text->type) == word_Code)
	501	? (attraux(text->aux) == attr_Only ? 2 :
	502	attraux(text->aux) == attr_Always ? 0 : 1)
	503	: 0) + 1);
	504	}
	505	return 0; /* should never happen */
	506	}
	507
	508	static void text_heading(FILE fp, word tprefix, word nprefix, word text,
	509	alignstruct align, int indent, int width) {
	510	rdstringc t = { 0, 0, NULL };
	511	int margin, length;
	512	int firstlinewidth, wrapwidth;
	513	wrappedline wrapping, p;
	514
	515	if (align.just_numbers && nprefix) {
63223c78	516	char *c;
d7482997	517	text_rdaddwc(&t, nprefix, NULL);
63223c78	518	if (text_convert(align.number_suffix, &c)) {
	519	rdaddsc(&t, c);
	520	sfree(c);
	521	}
d7482997	522	} else if (!align.just_numbers && tprefix) {
63223c78	523	char *c;
d7482997	524	text_rdaddwc(&t, tprefix, NULL);
63223c78	525	if (text_convert(align.number_suffix, &c)) {
	526	rdaddsc(&t, c);
	527	sfree(c);
	528	}
d7482997	529	}
	530	margin = length = (t.text ? strlen(t.text) : 0);
	531
	532	if (align.align == LEFTPLUS) {
	533	margin = indent - margin;
	534	if (margin < 0) margin = 0;
	535	firstlinewidth = indent + width - margin - length;
	536	wrapwidth = width;
	537	} else if (align.align == LEFT \|\| align.align == CENTRE) {
	538	margin = 0;
	539	firstlinewidth = indent + width - length;
	540	wrapwidth = indent + width;
	541	}
	542
43341922	543	wrapping = wrap_para(text, firstlinewidth, wrapwidth, text_width, NULL, 0);
d7482997	544	for (p = wrapping; p; p = p->next) {
	545	text_rdaddwc(&t, p->begin, p->end);
	546	length = (t.text ? strlen(t.text) : 0);
	547	if (align.align == CENTRE) {
	548	margin = (indent + width - length)/2;
	549	if (margin < 0) margin = 0;
	550	}
	551	fprintf(fp, "%*s%s\n", margin, "", t.text);
	552	if (align.underline != L'\0') {
	553	char *u, uc;
	554	wchar_t uw[2];
	555	uw[0] = align.underline; uw[1] = L'\0';
	556	text_convert(uw, &u);
	557	uc = u[0];
	558	sfree(u);
	559	fprintf(fp, "%*s", margin, "");
	560	while (length--)
	561	putc(uc, fp);
	562	putc('\n', fp);
	563	}
	564	if (align.align == LEFTPLUS)
	565	margin = indent;
	566	else
	567	margin = 0;
	568	sfree(t.text);
	569	t = empty_rdstringc;
	570	}
	571	wrap_free(wrapping);
	572	putc('\n', fp);
	573
	574	sfree(t.text);
	575	}
	576
	577	static void text_rule(FILE *fp, int indent, int width) {
	578	while (indent--) putc(' ', fp);
	579	while (width--) putc('-', fp); /* FIXME: configurability! */
	580	putc('\n', fp);
	581	putc('\n', fp);
	582	}
	583
	584	static void text_para(FILE fp, word prefix, char prefixextra, word text,
	585	int indent, int extraindent, int width) {
	586	wrappedline wrapping, p;
	587	rdstringc pfx = { 0, 0, NULL };
	588	int e;
	589	int firstlinewidth = width;
	590
	591	if (prefix) {
	592	text_rdaddwc(&pfx, prefix, NULL);
	593	if (prefixextra)
	594	rdaddsc(&pfx, prefixextra);
	595	fprintf(fp, "%*s%s", indent, "", pfx.text);
c83c6495	596	/* If the prefix is too long, shorten the first line to fit. */
d7482997	597	e = extraindent - strlen(pfx.text);
d7482997	598	if (e < 0) {
c83c6495	599	firstlinewidth += e; /* this decreases it, since e < 0 */
d7482997	600	if (firstlinewidth < 0) {
	601	e = indent + extraindent;
	602	firstlinewidth = width;
	603	fprintf(fp, "\n");
c83c6495	604	} else
c83c6495	605	e = 0;
d7482997	606	}
	607	sfree(pfx.text);
	608	} else
	609	e = indent + extraindent;
	610
43341922	611	wrapping = wrap_para(text, firstlinewidth, width, text_width, NULL, 0);
d7482997	612	for (p = wrapping; p; p = p->next) {
	613	rdstringc t = { 0, 0, NULL };
	614	text_rdaddwc(&t, p->begin, p->end);
	615	fprintf(fp, "%*s%s\n", e, "", t.text);
	616	e = indent + extraindent;
	617	sfree(t.text);
	618	}
	619	wrap_free(wrapping);
	620	putc('\n', fp);
	621	}
	622
	623	static void text_codepara(FILE fp, word text, int indent, int width) {
	624	for (; text; text = text->next) if (text->type == word_WeakCode) {
	625	char *c;
	626	text_convert(text->text, &c);
	627	if (strlen(c) > (size_t)width) {
	628	/* FIXME: warn */
	629	}
	630	fprintf(fp, "%*s%s\n", indent, "", c);
	631	sfree(c);
	632	}
	633
	634	putc('\n', fp);
	635	}
	636
	637	static void text_versionid(FILE fp, word text) {
	638	rdstringc t = { 0, 0, NULL };
	639
	640	rdaddc(&t, '['); /* FIXME: configurability */
	641	text_rdaddwc(&t, text, NULL);
	642	rdaddc(&t, ']'); /* FIXME: configurability */
	643
	644	fprintf(fp, "%s\n", t.text);
	645	sfree(t.text);
	646	}