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added support for alternate screen.

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This commit is contained in:
Aurélien Aptel 2010-08-30 16:48:18 +02:00
parent 326586ba43
commit 12c25bcea9
1 changed files with 56 additions and 14 deletions
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68
st.c
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@ -50,7 +50,7 @@ enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
CURSOR_SAVE, CURSOR_LOAD };
enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
enum { SCREEN_UPDATE, SCREEN_REDRAW };
@ -86,7 +86,8 @@ typedef struct {
typedef struct {
int row; /* nb row */
int col; /* nb col */
Line* line; /* screen */
Line* line; /* screen */
Line* alt; /* alternate screen */
TCursor c; /* cursor */
int top; /* top scroll limit */
int bot; /* bottom scroll limit */
@ -156,6 +157,7 @@ static void tscrolldown(int);
static void tsetattr(int*, int);
static void tsetchar(char);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void ttynew(void);
static void ttyread(void);
@ -337,12 +339,23 @@ tnew(int col, int row) {
/* set screen size */
term.row = row, term.col = col;
term.line = malloc(term.row * sizeof(Line));
for(row = 0 ; row < term.row; row++)
term.alt = malloc(term.row * sizeof(Line));
for(row = 0 ; row < term.row; row++) {
term.line[row] = malloc(term.col * sizeof(Glyph));
term.alt [row] = malloc(term.col * sizeof(Glyph));
}
/* setup screen */
treset();
}
void
tswapscreen(void) {
Line* tmp = term.line;
term.line = term.alt;
term.alt = tmp;
term.mode ^= MODE_ALTSCREEN;
}
void
tscrolldown (int n) {
int i;
@ -712,10 +725,21 @@ csihandle(void) {
case 25:
term.c.state |= CURSOR_HIDE;
break;
case 1048: /* XXX: no alt. screen to erase/save */
case 1047:
if(IS_SET(MODE_ALTSCREEN)) {
tclearregion(0, 0, term.col-1, term.row-1);
tswapscreen();
}
break;
case 1048:
tcursor(CURSOR_LOAD);
break;
case 1049:
tcursor(CURSOR_LOAD);
tclearregion(0, 0, term.col-1, term.row-1);
if(IS_SET(MODE_ALTSCREEN)) {
tclearregion(0, 0, term.col-1, term.row-1);
tswapscreen();
}
break;
default:
goto unknown;
@ -761,10 +785,21 @@ csihandle(void) {
case 25:
term.c.state &= ~CURSOR_HIDE;
break;
case 1047:
if(IS_SET(MODE_ALTSCREEN))
tclearregion(0, 0, term.col-1, term.row-1);
else
tswapscreen();
break;
case 1048:
case 1049: /* XXX: no alt. screen to erase/save */
tcursor(CURSOR_SAVE);
tclearregion(0, 0, term.col-1, term.row-1);
break;
case 1049:
tcursor(CURSOR_SAVE);
if(IS_SET(MODE_ALTSCREEN))
tclearregion(0, 0, term.col-1, term.row-1);
else
tswapscreen();
break;
default: goto unknown;
}
@ -889,19 +924,19 @@ tputc(char c) {
treset();
term.esc = 0;
break;
case '=': /* DECPAM */
case '=': /* DECPAM -- Application keypad */
term.mode |= MODE_APPKEYPAD;
term.esc = 0;
break;
case '>': /* DECPNM */
case '>': /* DECPNM -- Normal keypad */
term.mode &= ~MODE_APPKEYPAD;
term.esc = 0;
break;
case '7':
case '7': /* DECSC -- Save Cursor*/
tcursor(CURSOR_SAVE);
term.esc = 0;
break;
case '8':
case '8': /* DECRC -- Restore Cursor */
tcursor(CURSOR_LOAD);
term.esc = 0;
break;
@ -961,21 +996,28 @@ tresize(int col, int row) {
return;
/* free uneeded rows */
for(i = row; i < term.row; i++)
for(i = row; i < term.row; i++) {
free(term.line[i]);
free(term.alt[i]);
}
/* resize to new height */
term.line = realloc(term.line, row * sizeof(Line));
term.line = realloc(term.alt, row * sizeof(Line));
/* resize each row to new width, zero-pad if needed */
for(i = 0; i < minrow; i++) {
term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
}
/* allocate any new rows */
for(/* i == minrow */; i < row; i++)
for(/* i == minrow */; i < row; i++) {
term.line[i] = calloc(col, sizeof(Glyph));
term.alt [i] = calloc(col, sizeof(Glyph));
}
/* update terminal size */
term.col = col, term.row = row;