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Diffstat (limited to 'termact.c')
| -rw-r--r-- | termact.c | 678 |
1 files changed, 678 insertions, 0 deletions
diff --git a/termact.c b/termact.c new file mode 100644 index 00000000..0c355cbd --- /dev/null +++ b/termact.c @@ -0,0 +1,678 @@ +/* $Id: termact.c,v 1.1 2009/02/21 19:05:28 kristaps Exp $ */ +/* + * Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se> + * + * 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 <assert.h> +#include <stdlib.h> +#include <string.h> + +#include "term.h" + +#define TTYPE_PROG 0 +#define TTYPE_CMD_FLAG 1 +#define TTYPE_CMD_ARG 2 +#define TTYPE_SECTION 3 +#define TTYPE_NMAX 4 + +/* + * These define "styles" for element types, like command arguments or + * executable names. This is useful when multiple macros must decorate + * the same thing (like .Ex -std cmd and .Nm cmd). + */ + +const int ttypes[TTYPE_NMAX] = { + TERMP_BOLD, /* TTYPE_PROG */ + TERMP_BOLD, /* TTYPE_CMD_FLAG */ + TERMP_UNDERLINE, /* TTYPE_CMD_ARG */ + TERMP_BOLD /* TTYPE_SECTION */ +}; + +static int arg_hasattr(int, size_t, + const struct mdoc_arg *); +static int arg_getattr(int, size_t, + const struct mdoc_arg *); + +/* + * What follows describes prefix and postfix operations for the abstract + * syntax tree descent. + */ + +#define DECL_ARGS \ + struct termp *p, \ + const struct mdoc_meta *meta, \ + const struct mdoc_node *node + +#define DECL_PREPOST(name, suffix) \ +static int name##_##suffix(DECL_ARGS) + +#define DECL_PRE(name) DECL_PREPOST(name, pre) +#define DECL_POST(name) DECL_PREPOST(name, post) + +DECL_PRE(termp_aq); +DECL_PRE(termp_ar); +DECL_PRE(termp_d1); +DECL_PRE(termp_dq); +DECL_PRE(termp_ex); +DECL_PRE(termp_fl); +DECL_PRE(termp_it); +DECL_PRE(termp_nd); +DECL_PRE(termp_nm); +DECL_PRE(termp_ns); +DECL_PRE(termp_op); +DECL_PRE(termp_pp); +DECL_PRE(termp_sh); +DECL_PRE(termp_ud); +DECL_PRE(termp_xr); + +DECL_POST(termp_aq); +DECL_POST(termp_ar); +DECL_POST(termp_bl); +DECL_POST(termp_d1); +DECL_POST(termp_dq); +DECL_POST(termp_fl); +DECL_POST(termp_it); +DECL_POST(termp_nm); +DECL_POST(termp_op); +DECL_POST(termp_sh); + +const struct termact __termacts[MDOC_MAX] = { + { NULL, NULL }, /* \" */ + { NULL, NULL }, /* Dd */ + { NULL, NULL }, /* Dt */ + { NULL, NULL }, /* Os */ + { termp_sh_pre, termp_sh_post }, /* Sh */ + { NULL, NULL }, /* Ss */ + { termp_pp_pre, NULL }, /* Pp */ + { termp_d1_pre, termp_d1_post }, /* D1 */ + { NULL, NULL }, /* Dl */ + { NULL, NULL }, /* Bd */ + { NULL, NULL }, /* Ed */ + { NULL, termp_bl_post }, /* Bl */ + { NULL, NULL }, /* El */ + { termp_it_pre, termp_it_post }, /* It */ + { NULL, NULL }, /* Ad */ + { NULL, NULL }, /* An */ + { termp_ar_pre, termp_ar_post }, /* Ar */ + { NULL, NULL }, /* Cd */ + { NULL, NULL }, /* Cm */ + { NULL, NULL }, /* Dv */ + { NULL, NULL }, /* Er */ + { NULL, NULL }, /* Ev */ + { termp_ex_pre, NULL }, /* Ex */ + { NULL, NULL }, /* Fa */ + { NULL, NULL }, /* Fd */ + { termp_fl_pre, termp_fl_post }, /* Fl */ + { NULL, NULL }, /* Fn */ + { NULL, NULL }, /* Ft */ + { NULL, NULL }, /* Ic */ + { NULL, NULL }, /* In */ + { NULL, NULL }, /* Li */ + { termp_nd_pre, NULL }, /* Nd */ + { termp_nm_pre, termp_nm_post }, /* Nm */ + { termp_op_pre, termp_op_post }, /* Op */ + { NULL, NULL }, /* Ot */ + { NULL, NULL }, /* Pa */ + { NULL, NULL }, /* Rv */ + { NULL, NULL }, /* St */ + { NULL, NULL }, /* Va */ + { NULL, NULL }, /* Vt */ + { termp_xr_pre, NULL }, /* Xr */ + { NULL, NULL }, /* %A */ + { NULL, NULL }, /* %B */ + { NULL, NULL }, /* %D */ + { NULL, NULL }, /* %I */ + { NULL, NULL }, /* %J */ + { NULL, NULL }, /* %N */ + { NULL, NULL }, /* %O */ + { NULL, NULL }, /* %P */ + { NULL, NULL }, /* %R */ + { NULL, NULL }, /* %T */ + { NULL, NULL }, /* %V */ + { NULL, NULL }, /* Ac */ + { NULL, NULL }, /* Ao */ + { termp_aq_pre, termp_aq_post }, /* Aq */ + { NULL, NULL }, /* At */ + { NULL, NULL }, /* Bc */ + { NULL, NULL }, /* Bf */ + { NULL, NULL }, /* Bo */ + { NULL, NULL }, /* Bq */ + { NULL, NULL }, /* Bsx */ + { NULL, NULL }, /* Bx */ + { NULL, NULL }, /* Db */ + { NULL, NULL }, /* Dc */ + { NULL, NULL }, /* Do */ + { termp_dq_pre, termp_dq_post }, /* Dq */ + { NULL, NULL }, /* Ec */ + { NULL, NULL }, /* Ef */ + { NULL, NULL }, /* Em */ + { NULL, NULL }, /* Eo */ + { NULL, NULL }, /* Fx */ + { NULL, NULL }, /* Ms */ + { NULL, NULL }, /* No */ + { termp_ns_pre, NULL }, /* Ns */ + { NULL, NULL }, /* Nx */ + { NULL, NULL }, /* Ox */ + { NULL, NULL }, /* Pc */ + { NULL, NULL }, /* Pf */ + { NULL, NULL }, /* Po */ + { NULL, NULL }, /* Pq */ + { NULL, NULL }, /* Qc */ + { NULL, NULL }, /* Ql */ + { NULL, NULL }, /* Qo */ + { NULL, NULL }, /* Qq */ + { NULL, NULL }, /* Re */ + { NULL, NULL }, /* Rs */ + { NULL, NULL }, /* Sc */ + { NULL, NULL }, /* So */ + { NULL, NULL }, /* Sq */ + { NULL, NULL }, /* Sm */ + { NULL, NULL }, /* Sx */ + { NULL, NULL }, /* Sy */ + { NULL, NULL }, /* Tn */ + { NULL, NULL }, /* Ux */ + { NULL, NULL }, /* Xc */ + { NULL, NULL }, /* Xo */ + { NULL, NULL }, /* Fo */ + { NULL, NULL }, /* Fc */ + { NULL, NULL }, /* Oo */ + { NULL, NULL }, /* Oc */ + { NULL, NULL }, /* Bk */ + { NULL, NULL }, /* Ek */ + { NULL, NULL }, /* Bt */ + { NULL, NULL }, /* Hf */ + { NULL, NULL }, /* Fr */ + { termp_ud_pre, NULL }, /* Ud */ +}; + +const struct termact *termacts = __termacts; + + +/* ARGSUSED */ +static int +termp_dq_pre(DECL_ARGS) +{ + + if (MDOC_BODY != node->type) + return(1); + + word(p, "``"); + p->flags |= TERMP_NOSPACE; + return(1); +} + + +/* ARGSUSED */ +static int +termp_dq_post(DECL_ARGS) +{ + + if (MDOC_BODY != node->type) + return(1); + + p->flags |= TERMP_NOSPACE; + word(p, "''"); + return(1); +} + + +/* ARGSUSED */ +static int +termp_it_post(DECL_ARGS) +{ + const struct mdoc_node *n, *it; + const struct mdoc_block *bl; + int i; + size_t width; + + /* + * This (and termp_it_pre()) are the most complicated functions + * here. They must account for a considerable number of + * switches that completely change the output behaviour, like + * -tag versus -column. Yech. + */ + + switch (node->type) { + case (MDOC_BODY): + /* FALLTHROUGH */ + case (MDOC_HEAD): + break; + default: + return(1); + } + + it = node->parent; + assert(MDOC_BLOCK == it->type); + assert(MDOC_It == it->tok); + + n = it->parent; + assert(MDOC_BODY == n->type); + assert(MDOC_Bl == n->tok); + n = n->parent; + bl = &n->data.block; + + /* If `-tag', adjust our margins accordingly. */ + + if (arg_hasattr(MDOC_Tag, bl->argc, bl->argv)) { + i = arg_getattr(MDOC_Width, bl->argc, bl->argv); + assert(i >= 0); + assert(1 == bl->argv[i].sz); + width = strlen(*bl->argv[i].value); /* XXX */ + + if (MDOC_HEAD == node->type) { + flushln(p); + /* FIXME: nested lists. */ + p->rmargin = p->maxrmargin; + p->flags &= ~TERMP_NOBREAK; + } else { + flushln(p); + p->offset -= width + 1; + p->flags &= ~TERMP_NOLPAD; + } + } + + return(1); +} + + +/* ARGSUSED */ +static int +termp_it_pre(DECL_ARGS) +{ + const struct mdoc_node *n, *it; + const struct mdoc_block *bl; + int i; + size_t width; + + /* + * Also see termp_it_post() for general comments. + */ + + switch (node->type) { + case (MDOC_BODY): + /* FALLTHROUGH */ + case (MDOC_HEAD): + it = node->parent; + break; + case (MDOC_BLOCK): + it = node; + break; + default: + return(1); + } + + assert(MDOC_BLOCK == it->type); + assert(MDOC_It == it->tok); + + n = it->parent; + assert(MDOC_BODY == n->type); + assert(MDOC_Bl == n->tok); + n = n->parent; + bl = &n->data.block; + + /* If `-compact', don't assert vertical space. */ + + if (MDOC_BLOCK == node->type) { + if (arg_hasattr(MDOC_Compact, bl->argc, bl->argv)) + newln(p); + else + vspace(p); + return(1); + } + + assert(MDOC_HEAD == node->type + || MDOC_BODY == node->type); + + /* If `-tag', adjust our margins accordingly. */ + + if (arg_hasattr(MDOC_Tag, bl->argc, bl->argv)) { + i = arg_getattr(MDOC_Width, bl->argc, bl->argv); + assert(i >= 0); /* XXX */ + assert(1 == bl->argv[i].sz); + width = strlen(*bl->argv[i].value); /* XXX */ + + /* FIXME: nested lists. */ + + if (MDOC_HEAD == node->type) { + p->flags |= TERMP_NOBREAK; + p->flags |= TERMP_NOSPACE; + p->rmargin = p->offset + width; + } else { + p->flags |= TERMP_NOSPACE; + p->flags |= TERMP_NOLPAD; + p->offset += width + 1; + } + } + + return(1); +} + + +/* ARGSUSED */ +static int +termp_nm_post(DECL_ARGS) +{ + + p->flags &= ~ttypes[TTYPE_PROG]; + return(1); +} + + +/* ARGSUSED */ +static int +termp_fl_post(DECL_ARGS) +{ + + p->flags &= ~ttypes[TTYPE_CMD_FLAG]; + return(1); +} + + +/* ARGSUSED */ +static int +termp_ar_pre(DECL_ARGS) +{ + + p->flags |= ttypes[TTYPE_CMD_ARG]; + if (NULL == node->child) + word(p, "..."); + return(1); +} + + +/* ARGSUSED */ +static int +termp_nm_pre(DECL_ARGS) +{ + + p->flags |= ttypes[TTYPE_PROG]; + if (NULL == node->child) + word(p, meta->name); + return(1); +} + + +/* ARGSUSED */ +static int +termp_ns_pre(DECL_ARGS) +{ + + p->flags |= TERMP_NOSPACE; + return(1); +} + + +/* ARGSUSED */ +static int +termp_pp_pre(DECL_ARGS) +{ + + vspace(p); + return(1); +} + + +/* ARGSUSED */ +static int +termp_ar_post(DECL_ARGS) +{ + + p->flags &= ~ttypes[TTYPE_CMD_ARG]; + return(1); +} + + +/* ARGSUSED */ +static int +termp_ex_pre(DECL_ARGS) +{ + int i; + + i = arg_getattr(MDOC_Std, node->data.elem.argc, + node->data.elem.argv); + assert(i >= 0); + + word(p, "The"); + p->flags |= ttypes[TTYPE_PROG]; + word(p, *node->data.elem.argv[i].value); + p->flags &= ~ttypes[TTYPE_PROG]; + word(p, "utility exits 0 on success, and >0 if an error occurs."); + + return(1); +} + + +/* ARGSUSED */ +static int +termp_nd_pre(DECL_ARGS) +{ + + word(p, "\\-"); + return(1); +} + + +/* ARGSUSED */ +static int +termp_bl_post(DECL_ARGS) +{ + + switch (node->type) { + case (MDOC_BLOCK): + newln(p); + break; + default: + break; + } + return(1); +} + + +/* ARGSUSED */ +static int +termp_op_post(DECL_ARGS) +{ + + switch (node->type) { + case (MDOC_BODY): + p->flags |= TERMP_NOSPACE; + word(p, "\\]"); + break; + default: + break; + } + return(1); +} + + +/* ARGSUSED */ +static int +termp_sh_post(DECL_ARGS) +{ + + switch (node->type) { + case (MDOC_HEAD): + p->flags &= ~ttypes[TTYPE_SECTION]; + newln(p); + break; + case (MDOC_BODY): + newln(p); + p->offset -= 4; + break; + default: + break; + } + return(1); +} + + +/* ARGSUSED */ +static int +termp_xr_pre(DECL_ARGS) +{ + const struct mdoc_node *n; + + n = node->child; + assert(n); + + assert(MDOC_TEXT == n->type); + word(p, n->data.text.string); + + if (NULL == (n = n->next)) + return(0); + + assert(MDOC_TEXT == n->type); + p->flags |= TERMP_NOSPACE; + word(p, "\\("); + p->flags |= TERMP_NOSPACE; + word(p, n->data.text.string); + p->flags |= TERMP_NOSPACE; + word(p, "\\)"); + + return(0); +} + + +/* ARGSUSED */ +static int +termp_sh_pre(DECL_ARGS) +{ + + switch (node->type) { + case (MDOC_HEAD): + vspace(p); + p->flags |= ttypes[TTYPE_SECTION]; + break; + case (MDOC_BODY): + p->offset += 4; + break; + default: + break; + } + return(1); +} + + +/* ARGSUSED */ +static int +termp_op_pre(DECL_ARGS) +{ + + switch (node->type) { + case (MDOC_BODY): + word(p, "\\["); + p->flags |= TERMP_NOSPACE; + break; + default: + break; + } + return(1); +} + + +/* ARGSUSED */ +static int +termp_ud_pre(DECL_ARGS) +{ + + word(p, "currently under development."); + return(1); +} + + +/* ARGSUSED */ +static int +termp_fl_pre(DECL_ARGS) +{ + + p->flags |= ttypes[TTYPE_CMD_FLAG]; + word(p, "\\-"); + p->flags |= TERMP_NOSPACE; + return(1); +} + + +/* ARGSUSED */ +static int +termp_d1_pre(DECL_ARGS) +{ + + if (MDOC_BODY != node->type) + return(1); + newln(p); + p->offset += 4; + return(1); +} + + +/* ARGSUSED */ +static int +termp_d1_post(DECL_ARGS) +{ + + if (MDOC_BODY != node->type) + return(1); + newln(p); + p->offset -= 4; + return(1); +} + + +/* ARGSUSED */ +static int +termp_aq_pre(DECL_ARGS) +{ + + if (MDOC_BODY != node->type) + return(1); + word(p, "\\<"); + p->flags |= TERMP_NOSPACE; + return(1); +} + + +/* ARGSUSED */ +static int +termp_aq_post(DECL_ARGS) +{ + + if (MDOC_BODY != node->type) + return(1); + p->flags |= TERMP_NOSPACE; + word(p, "\\>"); + return(1); +} + + +static int +arg_hasattr(int arg, size_t argc, const struct mdoc_arg *argv) +{ + + return(-1 != arg_getattr(arg, argc, argv)); +} + + +static int +arg_getattr(int arg, size_t argc, const struct mdoc_arg *argv) +{ + int i; + + for (i = 0; i < (int)argc; i++) + if (argv[i].arg == arg) + return(i); + return(-1); +} + |