added support for alternate screen.
This commit is contained in:
Aurélien Aptel
parent
326586ba43
commit
12c25bcea9
70
st.c
70
st.c
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@ -50,7 +50,7 @@ enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
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CURSOR_SAVE, CURSOR_LOAD };
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enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
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enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
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enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
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enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
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enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
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enum { SCREEN_UPDATE, SCREEN_REDRAW };
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@ -86,7 +86,8 @@ typedef struct {
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typedef struct {
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int row; /* nb row */
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int col; /* nb col */
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Line* line; /* screen */
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Line* line; /* screen */
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Line* alt; /* alternate screen */
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TCursor c; /* cursor */
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int top; /* top scroll limit */
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int bot; /* bottom scroll limit */
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@ -156,6 +157,7 @@ static void tscrolldown(int);
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static void tsetattr(int*, int);
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static void tsetchar(char);
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static void tsetscroll(int, int);
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static void tswapscreen(void);
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static void ttynew(void);
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static void ttyread(void);
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@ -337,12 +339,23 @@ tnew(int col, int row) {
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/* set screen size */
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term.row = row, term.col = col;
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term.line = malloc(term.row * sizeof(Line));
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for(row = 0 ; row < term.row; row++)
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term.alt = malloc(term.row * sizeof(Line));
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for(row = 0 ; row < term.row; row++) {
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term.line[row] = malloc(term.col * sizeof(Glyph));
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term.alt [row] = malloc(term.col * sizeof(Glyph));
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}
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/* setup screen */
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treset();
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}
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void
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tswapscreen(void) {
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Line* tmp = term.line;
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term.line = term.alt;
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term.alt = tmp;
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term.mode ^= MODE_ALTSCREEN;
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}
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void
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tscrolldown (int n) {
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int i;
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@ -712,10 +725,21 @@ csihandle(void) {
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case 25:
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term.c.state |= CURSOR_HIDE;
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break;
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case 1048: /* XXX: no alt. screen to erase/save */
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case 1047:
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if(IS_SET(MODE_ALTSCREEN)) {
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tclearregion(0, 0, term.col-1, term.row-1);
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tswapscreen();
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}
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break;
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case 1048:
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tcursor(CURSOR_LOAD);
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break;
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case 1049:
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tcursor(CURSOR_LOAD);
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tclearregion(0, 0, term.col-1, term.row-1);
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if(IS_SET(MODE_ALTSCREEN)) {
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tclearregion(0, 0, term.col-1, term.row-1);
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tswapscreen();
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}
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break;
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default:
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goto unknown;
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@ -761,10 +785,21 @@ csihandle(void) {
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case 25:
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term.c.state &= ~CURSOR_HIDE;
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break;
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case 1048:
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case 1049: /* XXX: no alt. screen to erase/save */
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case 1047:
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if(IS_SET(MODE_ALTSCREEN))
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tclearregion(0, 0, term.col-1, term.row-1);
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else
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tswapscreen();
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break;
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case 1048:
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tcursor(CURSOR_SAVE);
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tclearregion(0, 0, term.col-1, term.row-1);
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break;
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case 1049:
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tcursor(CURSOR_SAVE);
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if(IS_SET(MODE_ALTSCREEN))
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tclearregion(0, 0, term.col-1, term.row-1);
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else
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tswapscreen();
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break;
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default: goto unknown;
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}
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@ -889,19 +924,19 @@ tputc(char c) {
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treset();
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term.esc = 0;
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break;
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case '=': /* DECPAM */
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case '=': /* DECPAM -- Application keypad */
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term.mode |= MODE_APPKEYPAD;
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term.esc = 0;
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break;
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case '>': /* DECPNM */
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case '>': /* DECPNM -- Normal keypad */
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term.mode &= ~MODE_APPKEYPAD;
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term.esc = 0;
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break;
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case '7':
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case '7': /* DECSC -- Save Cursor*/
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tcursor(CURSOR_SAVE);
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term.esc = 0;
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break;
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case '8':
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case '8': /* DECRC -- Restore Cursor */
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tcursor(CURSOR_LOAD);
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term.esc = 0;
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break;
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@ -961,21 +996,28 @@ tresize(int col, int row) {
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return;
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/* free uneeded rows */
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for(i = row; i < term.row; i++)
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for(i = row; i < term.row; i++) {
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free(term.line[i]);
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free(term.alt[i]);
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}
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/* resize to new height */
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term.line = realloc(term.line, row * sizeof(Line));
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term.line = realloc(term.alt, row * sizeof(Line));
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/* resize each row to new width, zero-pad if needed */
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for(i = 0; i < minrow; i++) {
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term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
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term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
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memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
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memset(term.alt[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
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}
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/* allocate any new rows */
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for(/* i == minrow */; i < row; i++)
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for(/* i == minrow */; i < row; i++) {
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term.line[i] = calloc(col, sizeof(Glyph));
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term.alt [i] = calloc(col, sizeof(Glyph));
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}
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/* update terminal size */
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term.col = col, term.row = row;
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