/* $Id: out.c,v 1.64 2017/06/08 12:54:58 schwarze Exp $ */ /* * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons * Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "config.h" #include #include #include #include #include #include "mandoc_aux.h" #include "mandoc.h" #include "out.h" static void tblcalc_data(struct rofftbl *, struct roffcol *, const struct tbl_opts *, const struct tbl_dat *); static void tblcalc_literal(struct rofftbl *, struct roffcol *, const struct tbl_dat *); static void tblcalc_number(struct rofftbl *, struct roffcol *, const struct tbl_opts *, const struct tbl_dat *); /* * Parse the *src string and store a scaling unit into *dst. * If the string doesn't specify the unit, use the default. * If no default is specified, fail. * Return a pointer to the byte after the last byte used, * or NULL on total failure. */ const char * a2roffsu(const char *src, struct roffsu *dst, enum roffscale def) { char *endptr; dst->unit = def == SCALE_MAX ? SCALE_BU : def; dst->scale = strtod(src, &endptr); if (endptr == src) return NULL; switch (*endptr++) { case 'c': dst->unit = SCALE_CM; break; case 'i': dst->unit = SCALE_IN; break; case 'f': dst->unit = SCALE_FS; break; case 'M': dst->unit = SCALE_MM; break; case 'm': dst->unit = SCALE_EM; break; case 'n': dst->unit = SCALE_EN; break; case 'P': dst->unit = SCALE_PC; break; case 'p': dst->unit = SCALE_PT; break; case 'u': dst->unit = SCALE_BU; break; case 'v': dst->unit = SCALE_VS; break; case '\0': endptr--; /* FALLTHROUGH */ default: if (SCALE_MAX == def) return NULL; dst->unit = def; break; } return endptr; } /* * Calculate the abstract widths and decimal positions of columns in a * table. This routine allocates the columns structures then runs over * all rows and cells in the table. The function pointers in "tbl" are * used for the actual width calculations. */ void tblcalc(struct rofftbl *tbl, const struct tbl_span *sp, size_t totalwidth) { const struct tbl_opts *opts; const struct tbl_dat *dp; struct roffcol *col; size_t ewidth, xwidth; int spans; int icol, maxcol, necol, nxcol, quirkcol; /* * Allocate the master column specifiers. These will hold the * widths and decimal positions for all cells in the column. It * must be freed and nullified by the caller. */ assert(NULL == tbl->cols); tbl->cols = mandoc_calloc((size_t)sp->opts->cols, sizeof(struct roffcol)); opts = sp->opts; for (maxcol = -1; sp; sp = sp->next) { if (TBL_SPAN_DATA != sp->pos) continue; spans = 1; /* * Account for the data cells in the layout, matching it * to data cells in the data section. */ for (dp = sp->first; dp; dp = dp->next) { /* Do not used spanned cells in the calculation. */ if (0 < --spans) continue; spans = dp->spans; if (1 < spans) continue; icol = dp->layout->col; if (maxcol < icol) maxcol = icol; col = tbl->cols + icol; col->flags |= dp->layout->flags; if (dp->layout->flags & TBL_CELL_WIGN) continue; tblcalc_data(tbl, col, opts, dp); } } /* * Count columns to equalize and columns to maximize. * Find maximum width of the columns to equalize. * Find total width of the columns *not* to maximize. */ necol = nxcol = 0; ewidth = xwidth = 0; for (icol = 0; icol <= maxcol; icol++) { col = tbl->cols + icol; if (col->flags & TBL_CELL_EQUAL) { necol++; if (ewidth < col->width) ewidth = col->width; } if (col->flags & TBL_CELL_WMAX) nxcol++; else xwidth += col->width; } /* * Equalize columns, if requested for any of them. * Update total width of the columns not to maximize. */ if (necol) { for (icol = 0; icol <= maxcol; icol++) { col = tbl->cols + icol; if ( ! (col->flags & TBL_CELL_EQUAL)) continue; if (col->width == ewidth) continue; if (nxcol && totalwidth) xwidth += ewidth - col->width; col->width = ewidth; } } /* * If there are any columns to maximize, find the total * available width, deducting 3n margins between columns. * Distribute the available width evenly. */ if (nxcol && totalwidth) { xwidth += 3*maxcol + (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ? 2 : !!opts->lvert + !!opts->rvert); if (xwidth >= totalwidth) return; xwidth = totalwidth - xwidth; /* * Emulate a bug in GNU tbl width calculation that * manifests itself for large numbers of x-columns. * Emulating it for 5 x-columns gives identical * behaviour for up to 6 x-columns. */ if (nxcol == 5) { quirkcol = xwidth % nxcol + 2; if (quirkcol != 3 && quirkcol != 4) quirkcol = -1; } else quirkcol = -1; necol = 0; ewidth = 0; for (icol = 0; icol <= maxcol; icol++) { col = tbl->cols + icol; if ( ! (col->flags & TBL_CELL_WMAX)) continue; col->width = (double)xwidth * ++necol / nxcol - ewidth + 0.4995; if (necol == quirkcol) col->width--; ewidth += col->width; } } } static void tblcalc_data(struct rofftbl *tbl, struct roffcol *col, const struct tbl_opts *opts, const struct tbl_dat *dp) { size_t sz; /* Branch down into data sub-types. */ switch (dp->layout->pos) { case TBL_CELL_HORIZ: case TBL_CELL_DHORIZ: sz = (*tbl->len)(1, tbl->arg); if (col->width < sz) col->width = sz; break; case TBL_CELL_LONG: case TBL_CELL_CENTRE: case TBL_CELL_LEFT: case TBL_CELL_RIGHT: tblcalc_literal(tbl, col, dp); break; case TBL_CELL_NUMBER: tblcalc_number(tbl, col, opts, dp); break; case TBL_CELL_DOWN: break; default: abort(); } } static void tblcalc_literal(struct rofftbl *tbl, struct roffcol *col, const struct tbl_dat *dp) { size_t sz; const char *str; str = dp->string ? dp->string : ""; sz = (*tbl->slen)(str, tbl->arg); if (col->width < sz) col->width = sz; } static void tblcalc_number(struct rofftbl *tbl, struct roffcol *col, const struct tbl_opts *opts, const struct tbl_dat *dp) { int i; size_t sz, psz, ssz, d; const char *str; char *cp; char buf[2]; /* * First calculate number width and decimal place (last + 1 for * non-decimal numbers). If the stored decimal is subsequent to * ours, make our size longer by that difference * (right-"shifting"); similarly, if ours is subsequent the * stored, then extend the stored size by the difference. * Finally, re-assign the stored values. */ str = dp->string ? dp->string : ""; sz = (*tbl->slen)(str, tbl->arg); /* FIXME: TBL_DATA_HORIZ et al.? */ buf[0] = opts->decimal; buf[1] = '\0'; psz = (*tbl->slen)(buf, tbl->arg); if (NULL != (cp = strrchr(str, opts->decimal))) { buf[1] = '\0'; for (ssz = 0, i = 0; cp != &str[i]; i++) { buf[0] = str[i]; ssz += (*tbl->slen)(buf, tbl->arg); } d = ssz + psz; } else d = sz + psz; /* Adjust the settings for this column. */ if (col->decimal > d) { sz += col->decimal - d; d = col->decimal; } else col->width += d - col->decimal; if (sz > col->width) col->width = sz; if (d > col->decimal) col->decimal = d; }