mirror of https://github.com/GnoConsortium/gno.git
130 lines
2.5 KiB
C
130 lines
2.5 KiB
C
/*
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* STEVIE - Simply Try this Editor for VI Enthusiasts
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*
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* Code Contributions By : Tim Thompson twitch!tjt
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* Tony Andrews onecom!wldrdg!tony
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* G. R. (Fred) Walter watmath!grwalter
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*/
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#include "stevie.h"
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#ifdef MEGAMAX
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overlay "mark"
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#endif
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/*
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* This file contains routines to maintain and manipulate marks.
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*/
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#define NMARKS 10 /* max. # of marks that can be saved */
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struct mark {
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char name;
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LPtr pos;
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};
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static struct mark mlist[NMARKS];
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static struct mark pcmark; /* previous context mark */
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static bool_t pcvalid = FALSE;/* true if pcmark is valid */
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/*
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* setmark(c) - set mark 'c' at current cursor position
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*
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* Returns TRUE on success, FALSE if no room for mark or bad name given.
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*/
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bool_t
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setmark(char c)
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{
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int i;
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if (!isalpha(c))
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return FALSE;
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/*
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* If there is already a mark of this name, then just use the existing
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* mark entry.
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*/
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for (i = 0; i < NMARKS; i++) {
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if (mlist[i].name == c) {
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mlist[i].pos = *Curschar;
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return TRUE;
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}
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}
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/*
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* There wasn't a mark of the given name, so find a free slot
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*/
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for (i = 0; i < NMARKS; i++) {
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if (mlist[i].name == NUL) { /* got a free one */
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mlist[i].name = c;
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mlist[i].pos = *Curschar;
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return TRUE;
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}
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}
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return FALSE;
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}
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/*
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* setpcmark() - set the previous context mark to the current position
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*/
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void
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setpcmark(void)
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{
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pcmark.pos = *Curschar;
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pcvalid = TRUE;
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}
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/*
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* getmark(c) - find mark for char 'c'
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*
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* Return pointer to LPtr or NULL if no such mark.
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*/
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LPtr *
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getmark(char c)
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{
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int i;
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if (c == '\'' || c == '`') /* previous context mark */
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return pcvalid ? &(pcmark.pos) : (LPtr *) NULL;
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for (i = 0; i < NMARKS; i++) {
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if (mlist[i].name == c)
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return &(mlist[i].pos);
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}
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return (LPtr *) NULL;
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}
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/*
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* clrall() - clear all marks
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*
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* Used mainly when trashing the entire buffer during ":e" type commands
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*/
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void
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clrall(void)
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{
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int i;
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for (i = 0; i < NMARKS; i++)
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mlist[i].name = NUL;
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pcvalid = FALSE;
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}
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/*
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* clrmark(line) - clear any marks for 'line'
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*
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* Used any time a line is deleted so we don't have marks pointing to
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* non-existent lines.
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*/
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void
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clrmark(LINE *line)
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{
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int i;
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for (i = 0; i < NMARKS; i++) {
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if (mlist[i].pos.linep == line)
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mlist[i].name = NUL;
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}
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if (pcvalid && (pcmark.pos.linep == line))
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pcvalid = FALSE;
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}
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