aboutsummaryrefslogtreecommitdiff
path: root/patches/st-scrollback-reflow-0.8.5.diff
diff options
context:
space:
mode:
Diffstat (limited to 'patches/st-scrollback-reflow-0.8.5.diff')
-rw-r--r--patches/st-scrollback-reflow-0.8.5.diff1478
1 files changed, 0 insertions, 1478 deletions
diff --git a/patches/st-scrollback-reflow-0.8.5.diff b/patches/st-scrollback-reflow-0.8.5.diff
deleted file mode 100644
index 085c828..0000000
--- a/patches/st-scrollback-reflow-0.8.5.diff
+++ /dev/null
@@ -1,1478 +0,0 @@
-diff --git a/st.c b/st.c
-index 91e7077..a76d983 100644
---- a/st.c
-+++ b/st.c
-@@ -36,6 +36,7 @@
- #define STR_BUF_SIZ ESC_BUF_SIZ
- #define STR_ARG_SIZ ESC_ARG_SIZ
- #define HISTSIZE 2000
-+#define RESIZEBUFFER 1000
-
- /* macros */
- #define IS_SET(flag) ((term.mode & (flag)) != 0)
-@@ -43,9 +44,22 @@
- #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
- #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
- #define ISDELIM(u) (u && wcschr(worddelimiters, u))
--#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - \
-- term.scr + HISTSIZE + 1) % HISTSIZE] : \
-- term.line[(y) - term.scr])
-+
-+#define TLINE(y) ( \
-+ (y) < term.scr ? term.hist[(term.histi + (y) - term.scr + 1 + HISTSIZE) % HISTSIZE] \
-+ : term.line[(y) - term.scr] \
-+)
-+
-+#define TLINEABS(y) ( \
-+ (y) < 0 ? term.hist[(term.histi + (y) + 1 + HISTSIZE) % HISTSIZE] : term.line[(y)] \
-+)
-+
-+#define UPDATEWRAPNEXT(alt, col) do { \
-+ if ((term.c.state & CURSOR_WRAPNEXT) && term.c.x + term.wrapcwidth[alt] < col) { \
-+ term.c.x += term.wrapcwidth[alt]; \
-+ term.c.state &= ~CURSOR_WRAPNEXT; \
-+ } \
-+} while (0);
-
- enum term_mode {
- MODE_WRAP = 1 << 0,
-@@ -57,6 +71,12 @@ enum term_mode {
- MODE_UTF8 = 1 << 6,
- };
-
-+enum scroll_mode {
-+ SCROLL_RESIZE = -1,
-+ SCROLL_NOSAVEHIST = 0,
-+ SCROLL_SAVEHIST = 1
-+};
-+
- enum cursor_movement {
- CURSOR_SAVE,
- CURSOR_LOAD
-@@ -118,10 +138,11 @@ typedef struct {
- int row; /* nb row */
- int col; /* nb col */
- Line *line; /* screen */
-- Line *alt; /* alternate screen */
- Line hist[HISTSIZE]; /* history buffer */
-- int histi; /* history index */
-- int scr; /* scroll back */
-+ int histi; /* history index */
-+ int histf; /* nb history available */
-+ int scr; /* scroll back */
-+ int wrapcwidth[2]; /* used in updating WRAPNEXT when resizing */
- int *dirty; /* dirtyness of lines */
- TCursor c; /* cursor */
- int ocx; /* old cursor col */
-@@ -179,26 +200,37 @@ static void tprinter(char *, size_t);
- static void tdumpsel(void);
- static void tdumpline(int);
- static void tdump(void);
--static void tclearregion(int, int, int, int);
-+static void tclearregion(int, int, int, int, int);
- static void tcursor(int);
-+static void tclearglyph(Glyph *, int);
-+static void tresetcursor(void);
- static void tdeletechar(int);
- static void tdeleteline(int);
- static void tinsertblank(int);
- static void tinsertblankline(int);
--static int tlinelen(int);
-+static int tlinelen(Line len);
-+static int tiswrapped(Line line);
-+static char *tgetglyphs(char *, const Glyph *, const Glyph *);
-+static size_t tgetline(char *, const Glyph *);
- static void tmoveto(int, int);
- static void tmoveato(int, int);
- static void tnewline(int);
- static void tputtab(int);
- static void tputc(Rune);
- static void treset(void);
--static void tscrollup(int, int, int);
--static void tscrolldown(int, int, int);
-+static void tscrollup(int, int, int, int);
-+static void tscrolldown(int, int);
-+static void treflow(int, int);
-+static void rscrolldown(int);
-+static void tresizedef(int, int);
-+static void tresizealt(int, int);
- static void tsetattr(const int *, int);
- static void tsetchar(Rune, const Glyph *, int, int);
- static void tsetdirt(int, int);
- static void tsetscroll(int, int);
- static void tswapscreen(void);
-+static void tloaddefscreen(int, int);
-+static void tloadaltscreen(int, int);
- static void tsetmode(int, int, const int *, int);
- static int twrite(const char *, int, int);
- static void tfulldirt(void);
-@@ -212,7 +244,10 @@ static void tstrsequence(uchar);
- static void drawregion(int, int, int, int);
-
- static void selnormalize(void);
--static void selscroll(int, int);
-+static void selscroll(int, int, int);
-+static void selmove(int);
-+static void selremove(void);
-+static int regionselected(int, int, int, int);
- static void selsnap(int *, int *, int);
-
- static size_t utf8decode(const char *, Rune *, size_t);
-@@ -412,17 +447,46 @@ selinit(void)
- }
-
- int
--tlinelen(int y)
-+tlinelen(Line line)
- {
-- int i = term.col;
-+ int i = term.col - 1;
-+
-+ for (; i >= 0 && !(line[i].mode & (ATTR_SET | ATTR_WRAP)); i--);
-+ return i + 1;
-+}
-
-- if (TLINE(y)[i - 1].mode & ATTR_WRAP)
-- return i;
-+int
-+tiswrapped(Line line)
-+{
-+ int len = tlinelen(line);
-
-- while (i > 0 && TLINE(y)[i - 1].u == ' ')
-- --i;
-+ return len > 0 && (line[len - 1].mode & ATTR_WRAP);
-+}
-
-- return i;
-+char *
-+tgetglyphs(char *buf, const Glyph *gp, const Glyph *lgp)
-+{
-+ while (gp <= lgp)
-+ if (gp->mode & ATTR_WDUMMY) {
-+ gp++;
-+ } else {
-+ buf += utf8encode((gp++)->u, buf);
-+ }
-+ return buf;
-+}
-+
-+size_t
-+tgetline(char *buf, const Glyph *fgp)
-+{
-+ char *ptr;
-+ const Glyph *lgp = &fgp[term.col - 1];
-+
-+ while (lgp > fgp && !(lgp->mode & (ATTR_SET | ATTR_WRAP)))
-+ lgp--;
-+ ptr = tgetglyphs(buf, fgp, lgp);
-+ if (!(lgp->mode & ATTR_WRAP))
-+ *(ptr++) = '\n';
-+ return ptr - buf;
- }
-
- void
-@@ -462,10 +526,11 @@ selextend(int col, int row, int type, int done)
-
- sel.oe.x = col;
- sel.oe.y = row;
-- selnormalize();
- sel.type = type;
-+ selnormalize();
-
-- if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY)
-+ if (oldey != sel.oe.y || oldex != sel.oe.x ||
-+ oldtype != sel.type || sel.mode == SEL_EMPTY)
- tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
-
- sel.mode = done ? SEL_IDLE : SEL_READY;
-@@ -492,36 +557,43 @@ selnormalize(void)
- /* expand selection over line breaks */
- if (sel.type == SEL_RECTANGULAR)
- return;
-- i = tlinelen(sel.nb.y);
-- if (i < sel.nb.x)
-+
-+ i = tlinelen(TLINE(sel.nb.y));
-+ if (sel.nb.x > i)
- sel.nb.x = i;
-- if (tlinelen(sel.ne.y) <= sel.ne.x)
-- sel.ne.x = term.col - 1;
-+ if (sel.ne.x >= tlinelen(TLINE(sel.ne.y)))
-+ sel.ne.x = term.col - 1;
- }
-
- int
--selected(int x, int y)
-+regionselected(int x1, int y1, int x2, int y2)
- {
-- if (sel.mode == SEL_EMPTY || sel.ob.x == -1 ||
-- sel.alt != IS_SET(MODE_ALTSCREEN))
-+ if (sel.ob.x == -1 || sel.mode == SEL_EMPTY ||
-+ sel.alt != IS_SET(MODE_ALTSCREEN) || sel.nb.y > y2 || sel.ne.y < y1)
- return 0;
-
-- if (sel.type == SEL_RECTANGULAR)
-- return BETWEEN(y, sel.nb.y, sel.ne.y)
-- && BETWEEN(x, sel.nb.x, sel.ne.x);
-+ return (sel.type == SEL_RECTANGULAR) ? sel.nb.x <= x2 && sel.ne.x >= x1
-+ : (sel.nb.y != y2 || sel.nb.x <= x2) &&
-+ (sel.ne.y != y1 || sel.ne.x >= x1);
-+}
-
-- return BETWEEN(y, sel.nb.y, sel.ne.y)
-- && (y != sel.nb.y || x >= sel.nb.x)
-- && (y != sel.ne.y || x <= sel.ne.x);
-+int
-+selected(int x, int y)
-+{
-+ return regionselected(x, y, x, y);
- }
-
- void
- selsnap(int *x, int *y, int direction)
- {
- int newx, newy, xt, yt;
-+ int rtop = 0, rbot = term.row - 1;
- int delim, prevdelim;
- const Glyph *gp, *prevgp;
-
-+ if (!IS_SET(MODE_ALTSCREEN))
-+ rtop += -term.histf + term.scr, rbot += term.scr;
-+
- switch (sel.snap) {
- case SNAP_WORD:
- /*
-@@ -536,7 +608,7 @@ selsnap(int *x, int *y, int direction)
- if (!BETWEEN(newx, 0, term.col - 1)) {
- newy += direction;
- newx = (newx + term.col) % term.col;
-- if (!BETWEEN(newy, 0, term.row - 1))
-+ if (!BETWEEN(newy, rtop, rbot))
- break;
-
- if (direction > 0)
-@@ -547,13 +619,13 @@ selsnap(int *x, int *y, int direction)
- break;
- }
-
-- if (newx >= tlinelen(newy))
-+ if (newx >= tlinelen(TLINE(newy)))
- break;
-
- gp = &TLINE(newy)[newx];
- delim = ISDELIM(gp->u);
-- if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
-- || (delim && gp->u != prevgp->u)))
-+ if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim ||
-+ (delim && !(gp->u == ' ' && prevgp->u == ' '))))
- break;
-
- *x = newx;
-@@ -570,18 +642,14 @@ selsnap(int *x, int *y, int direction)
- */
- *x = (direction < 0) ? 0 : term.col - 1;
- if (direction < 0) {
-- for (; *y > 0; *y += direction) {
-- if (!(TLINE(*y-1)[term.col-1].mode
-- & ATTR_WRAP)) {
-+ for (; *y > rtop; *y -= 1) {
-+ if (!tiswrapped(TLINE(*y-1)))
- break;
-- }
- }
- } else if (direction > 0) {
-- for (; *y < term.row-1; *y += direction) {
-- if (!(TLINE(*y)[term.col-1].mode
-- & ATTR_WRAP)) {
-+ for (; *y < rbot; *y += 1) {
-+ if (!tiswrapped(TLINE(*y)))
- break;
-- }
- }
- }
- break;
-@@ -592,40 +660,34 @@ char *
- getsel(void)
- {
- char *str, *ptr;
-- int y, bufsize, lastx, linelen;
-- const Glyph *gp, *last;
-+ int y, lastx, linelen;
-+ const Glyph *gp, *lgp;
-
-- if (sel.ob.x == -1)
-+ if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN))
- return NULL;
-
-- bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
-- ptr = str = xmalloc(bufsize);
-+ str = xmalloc((term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ);
-+ ptr = str;
-
- /* append every set & selected glyph to the selection */
- for (y = sel.nb.y; y <= sel.ne.y; y++) {
-- if ((linelen = tlinelen(y)) == 0) {
-+ Line line = TLINE(y);
-+
-+ if ((linelen = tlinelen(line)) == 0) {
- *ptr++ = '\n';
- continue;
- }
-
- if (sel.type == SEL_RECTANGULAR) {
-- gp = &TLINE(y)[sel.nb.x];
-+ gp = &line[sel.nb.x];
- lastx = sel.ne.x;
- } else {
-- gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0];
-+ gp = &line[sel.nb.y == y ? sel.nb.x : 0];
- lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
- }
-- last = &TLINE(y)[MIN(lastx, linelen-1)];
-- while (last >= gp && last->u == ' ')
-- --last;
--
-- for ( ; gp <= last; ++gp) {
-- if (gp->mode & ATTR_WDUMMY)
-- continue;
--
-- ptr += utf8encode(gp->u, ptr);
-- }
-+ lgp = &line[MIN(lastx, linelen-1)];
-
-+ ptr = tgetglyphs(ptr, gp, lgp);
- /*
- * Copy and pasting of line endings is inconsistent
- * in the inconsistent terminal and GUI world.
-@@ -636,10 +698,10 @@ getsel(void)
- * FIXME: Fix the computer world.
- */
- if ((y < sel.ne.y || lastx >= linelen) &&
-- (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
-+ (!(lgp->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
- *ptr++ = '\n';
- }
-- *ptr = 0;
-+ *ptr = '\0';
- return str;
- }
-
-@@ -648,9 +710,15 @@ selclear(void)
- {
- if (sel.ob.x == -1)
- return;
-+ selremove();
-+ tsetdirt(sel.nb.y, sel.ne.y);
-+}
-+
-+void
-+selremove(void)
-+{
- sel.mode = SEL_IDLE;
- sel.ob.x = -1;
-- tsetdirt(sel.nb.y, sel.ne.y);
- }
-
- void
-@@ -851,10 +919,8 @@ void
- ttywrite(const char *s, size_t n, int may_echo)
- {
- const char *next;
-- Arg arg = (Arg) { .i = term.scr };
--
-- kscrolldown(&arg);
-
-+ kscrolldown(&((Arg){ .i = term.scr }));
- if (may_echo && IS_SET(MODE_ECHO))
- twrite(s, n, 1);
-
-@@ -990,7 +1056,7 @@ tsetdirtattr(int attr)
- for (i = 0; i < term.row-1; i++) {
- for (j = 0; j < term.col-1; j++) {
- if (term.line[i][j].mode & attr) {
-- tsetdirt(i, i);
-+ term.dirty[i] = 1;
- break;
- }
- }
-@@ -1000,7 +1066,8 @@ tsetdirtattr(int attr)
- void
- tfulldirt(void)
- {
-- tsetdirt(0, term.row-1);
-+ for (int i = 0; i < term.row; i++)
-+ term.dirty[i] = 1;
- }
-
- void
-@@ -1017,51 +1084,116 @@ tcursor(int mode)
- }
- }
-
-+void
-+tresetcursor(void)
-+{
-+ term.c = (TCursor){ { .mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg },
-+ .x = 0, .y = 0, .state = CURSOR_DEFAULT };
-+}
-+
- void
- treset(void)
- {
- uint i;
-+ int x, y;
-
-- term.c = (TCursor){{
-- .mode = ATTR_NULL,
-- .fg = defaultfg,
-- .bg = defaultbg
-- }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
-+ tresetcursor();
-
- memset(term.tabs, 0, term.col * sizeof(*term.tabs));
- for (i = tabspaces; i < term.col; i += tabspaces)
- term.tabs[i] = 1;
- term.top = 0;
-+ term.histf = 0;
-+ term.scr = 0;
- term.bot = term.row - 1;
- term.mode = MODE_WRAP|MODE_UTF8;
- memset(term.trantbl, CS_USA, sizeof(term.trantbl));
- term.charset = 0;
-
-+ selremove();
- for (i = 0; i < 2; i++) {
-- tmoveto(0, 0);
-- tcursor(CURSOR_SAVE);
-- tclearregion(0, 0, term.col-1, term.row-1);
-+ tcursor(CURSOR_SAVE); /* reset saved cursor */
-+ for (y = 0; y < term.row; y++)
-+ for (x = 0; x < term.col; x++)
-+ tclearglyph(&term.line[y][x], 0);
- tswapscreen();
- }
-+ tfulldirt();
- }
-
- void
- tnew(int col, int row)
- {
-- term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
-- tresize(col, row);
-- treset();
-+ int i, j;
-+
-+ for (i = 0; i < 2; i++) {
-+ term.line = xmalloc(row * sizeof(Line));
-+ for (j = 0; j < row; j++)
-+ term.line[j] = xmalloc(col * sizeof(Glyph));
-+ term.col = col, term.row = row;
-+ tswapscreen();
-+ }
-+ term.dirty = xmalloc(row * sizeof(*term.dirty));
-+ term.tabs = xmalloc(col * sizeof(*term.tabs));
-+ for (i = 0; i < HISTSIZE; i++)
-+ term.hist[i] = xmalloc(col * sizeof(Glyph));
-+ treset();
- }
-
-+/* handle it with care */
- void
- tswapscreen(void)
- {
-- Line *tmp = term.line;
-+ static Line *altline;
-+ static int altcol, altrow;
-+ Line *tmpline = term.line;
-+ int tmpcol = term.col, tmprow = term.row;
-
-- term.line = term.alt;
-- term.alt = tmp;
-+ term.line = altline;
-+ term.col = altcol, term.row = altrow;
-+ altline = tmpline;
-+ altcol = tmpcol, altrow = tmprow;
- term.mode ^= MODE_ALTSCREEN;
-- tfulldirt();
-+}
-+
-+void
-+tloaddefscreen(int clear, int loadcursor)
-+{
-+ int col, row, alt = IS_SET(MODE_ALTSCREEN);
-+
-+ if (alt) {
-+ if (clear)
-+ tclearregion(0, 0, term.col-1, term.row-1, 1);
-+ col = term.col, row = term.row;
-+ tswapscreen();
-+ }
-+ if (loadcursor)
-+ tcursor(CURSOR_LOAD);
-+ if (alt)
-+ tresizedef(col, row);
-+}
-+
-+void
-+tloadaltscreen(int clear, int savecursor)
-+{
-+ int col, row, def = !IS_SET(MODE_ALTSCREEN);
-+
-+ if (savecursor)
-+ tcursor(CURSOR_SAVE);
-+ if (def) {
-+ col = term.col, row = term.row;
-+ tswapscreen();
-+ term.scr = 0;
-+ tresizealt(col, row);
-+ }
-+ if (clear)
-+ tclearregion(0, 0, term.col-1, term.row-1, 1);
-+}
-+
-+int
-+tisaltscreen(void)
-+{
-+ return IS_SET(MODE_ALTSCREEN);
- }
-
- void
-@@ -1069,17 +1201,22 @@ kscrolldown(const Arg* a)
- {
- int n = a->i;
-
-- if (n < 0)
-- n = term.row + n;
-+ if (!term.scr || IS_SET(MODE_ALTSCREEN))
-+ return;
-
-- if (n > term.scr)
-- n = term.scr;
-+ if (n < 0)
-+ n = MAX(term.row / -n, 1);
-
-- if (term.scr > 0) {
-+ if (n <= term.scr) {
- term.scr -= n;
-- selscroll(0, -n);
-- tfulldirt();
-+ } else {
-+ n = term.scr;
-+ term.scr = 0;
- }
-+
-+ if (sel.ob.x != -1 && !sel.alt)
-+ selmove(-n); /* negate change in term.scr */
-+ tfulldirt();
- }
-
- void
-@@ -1087,92 +1224,118 @@ kscrollup(const Arg* a)
- {
- int n = a->i;
-
-+ if (!term.histf || IS_SET(MODE_ALTSCREEN))
-+ return;
-+
- if (n < 0)
-- n = term.row + n;
-+ n = MAX(term.row / -n, 1);
-
-- if (term.scr <= HISTSIZE-n) {
-+ if (term.scr + n <= term.histf) {
- term.scr += n;
-- selscroll(0, n);
-- tfulldirt();
-+ } else {
-+ n = term.histf - term.scr;
-+ term.scr = term.histf;
- }
-+
-+ if (sel.ob.x != -1 && !sel.alt)
-+ selmove(n); /* negate change in term.scr */
-+ tfulldirt();
- }
-
- void
--tscrolldown(int orig, int n, int copyhist)
-+tscrolldown(int top, int n)
- {
-- int i;
-+ int i, bot = term.bot;
- Line temp;
-
-- LIMIT(n, 0, term.bot-orig+1);
-- if (copyhist) {
-- term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
-- temp = term.hist[term.histi];
-- term.hist[term.histi] = term.line[term.bot];
-- term.line[term.bot] = temp;
-- }
--
-+ if (n <= 0)
-+ return;
-+ n = MIN(n, bot-top+1);
-
-- tsetdirt(orig, term.bot-n);
-- tclearregion(0, term.bot-n+1, term.col-1, term.bot);
-+ tsetdirt(top, bot-n);
-+ tclearregion(0, bot-n+1, term.col-1, bot, 1);
-
-- for (i = term.bot; i >= orig+n; i--) {
-+ for (i = bot; i >= top+n; i--) {
- temp = term.line[i];
- term.line[i] = term.line[i-n];
- term.line[i-n] = temp;
- }
-
-- if (term.scr == 0)
-- selscroll(orig, n);
-+ if (sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN))
-+ selscroll(top, bot, n);
- }
-
- void
--tscrollup(int orig, int n, int copyhist)
-+tscrollup(int top, int bot, int n, int mode)
- {
-- int i;
-+ int i, j, s;
-+ int alt = IS_SET(MODE_ALTSCREEN);
-+ int savehist = !alt && top == 0 && mode != SCROLL_NOSAVEHIST;
- Line temp;
-
-- LIMIT(n, 0, term.bot-orig+1);
--
-- if (copyhist) {
-- term.histi = (term.histi + 1) % HISTSIZE;
-- temp = term.hist[term.histi];
-- term.hist[term.histi] = term.line[orig];
-- term.line[orig] = temp;
-+ if (n <= 0)
-+ return;
-+ n = MIN(n, bot-top+1);
-+
-+ if (savehist) {
-+ for (i = 0; i < n; i++) {
-+ term.histi = (term.histi + 1) % HISTSIZE;
-+ temp = term.hist[term.histi];
-+ for (j = 0; j < term.col; j++)
-+ tclearglyph(&temp[j], 1);
-+ term.hist[term.histi] = term.line[i];
-+ term.line[i] = temp;
-+ }
-+ term.histf = MIN(term.histf + n, HISTSIZE);
-+ s = n;
-+ if (term.scr) {
-+ j = term.scr;
-+ term.scr = MIN(j + n, HISTSIZE);
-+ s = j + n - term.scr;
-+ }
-+ if (mode != SCROLL_RESIZE)
-+ tfulldirt();
-+ } else {
-+ tclearregion(0, top, term.col-1, top+n-1, 1);
-+ tsetdirt(top+n, bot);
- }
-
-- if (term.scr > 0 && term.scr < HISTSIZE)
-- term.scr = MIN(term.scr + n, HISTSIZE-1);
--
-- tclearregion(0, orig, term.col-1, orig+n-1);
-- tsetdirt(orig+n, term.bot);
--
-- for (i = orig; i <= term.bot-n; i++) {
-+ for (i = top; i <= bot-n; i++) {
- temp = term.line[i];
- term.line[i] = term.line[i+n];
- term.line[i+n] = temp;
- }
-
-- if (term.scr == 0)
-- selscroll(orig, -n);
-+ if (sel.ob.x != -1 && sel.alt == alt) {
-+ if (!savehist) {
-+ selscroll(top, bot, -n);
-+ } else if (s > 0) {
-+ selmove(-s);
-+ if (-term.scr + sel.nb.y < -term.histf)
-+ selremove();
-+ }
-+ }
- }
-
- void
--selscroll(int orig, int n)
-+selmove(int n)
- {
-- if (sel.ob.x == -1)
-- return;
-+ sel.ob.y += n, sel.nb.y += n;
-+ sel.oe.y += n, sel.ne.y += n;
-+}
-+
-+void
-+selscroll(int top, int bot, int n)
-+{
-+ /* turn absolute coordinates into relative */
-+ top += term.scr, bot += term.scr;
-
-- if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) {
-+ if (BETWEEN(sel.nb.y, top, bot) != BETWEEN(sel.ne.y, top, bot)) {
- selclear();
-- } else if (BETWEEN(sel.nb.y, orig, term.bot)) {
-- sel.ob.y += n;
-- sel.oe.y += n;
-- if (sel.ob.y < term.top || sel.ob.y > term.bot ||
-- sel.oe.y < term.top || sel.oe.y > term.bot) {
-+ } else if (BETWEEN(sel.nb.y, top, bot)) {
-+ selmove(n);
-+ if (sel.nb.y < top || sel.ne.y > bot)
- selclear();
-- } else {
-- selnormalize();
-- }
- }
- }
-
-@@ -1182,7 +1345,7 @@ tnewline(int first_col)
- int y = term.c.y;
-
- if (y == term.bot) {
-- tscrollup(term.top, 1, 1);
-+ tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
- } else {
- y++;
- }
-@@ -1272,89 +1435,93 @@ tsetchar(Rune u, const Glyph *attr, int x, int y)
- } else if (term.line[y][x].mode & ATTR_WDUMMY) {
- term.line[y][x-1].u = ' ';
- term.line[y][x-1].mode &= ~ATTR_WIDE;
-- }
-+ }
-
- term.dirty[y] = 1;
- term.line[y][x] = *attr;
- term.line[y][x].u = u;
-+ term.line[y][x].mode |= ATTR_SET;
- }
-
- void
--tclearregion(int x1, int y1, int x2, int y2)
-+tclearglyph(Glyph *gp, int usecurattr)
- {
-- int x, y, temp;
-- Glyph *gp;
-+ if (usecurattr) {
-+ gp->fg = term.c.attr.fg;
-+ gp->bg = term.c.attr.bg;
-+ } else {
-+ gp->fg = defaultfg;
-+ gp->bg = defaultbg;
-+ }
-+ gp->mode = ATTR_NULL;
-+ gp->u = ' ';
-+}
-
-- if (x1 > x2)
-- temp = x1, x1 = x2, x2 = temp;
-- if (y1 > y2)
-- temp = y1, y1 = y2, y2 = temp;
-+void
-+tclearregion(int x1, int y1, int x2, int y2, int usecurattr)
-+{
-+ int x, y;
-
-- LIMIT(x1, 0, term.col-1);
-- LIMIT(x2, 0, term.col-1);
-- LIMIT(y1, 0, term.row-1);
-- LIMIT(y2, 0, term.row-1);
-+ /* regionselected() takes relative coordinates */
-+ if (regionselected(x1+term.scr, y1+term.scr, x2+term.scr, y2+term.scr))
-+ selremove();
-
- for (y = y1; y <= y2; y++) {
- term.dirty[y] = 1;
-- for (x = x1; x <= x2; x++) {
-- gp = &term.line[y][x];
-- if (selected(x, y))
-- selclear();
-- gp->fg = term.c.attr.fg;
-- gp->bg = term.c.attr.bg;
-- gp->mode = 0;
-- gp->u = ' ';
-- }
-+ for (x = x1; x <= x2; x++)
-+ tclearglyph(&term.line[y][x], usecurattr);
- }
- }
-
- void
- tdeletechar(int n)
- {
-- int dst, src, size;
-- Glyph *line;
--
-- LIMIT(n, 0, term.col - term.c.x);
-+ int src, dst, size;
-+ Line line;
-
-+ if (n <= 0)
-+ return;
- dst = term.c.x;
-- src = term.c.x + n;
-+ src = MIN(term.c.x + n, term.col);
- size = term.col - src;
-- line = term.line[term.c.y];
--
-- memmove(&line[dst], &line[src], size * sizeof(Glyph));
-- tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
-+ if (size > 0) { /* otherwise src would point beyond the array
-+ https://stackoverflow.com/questions/29844298 */
-+ line = term.line[term.c.y];
-+ memmove(&line[dst], &line[src], size * sizeof(Glyph));
-+ }
-+ tclearregion(dst + size, term.c.y, term.col - 1, term.c.y, 1);
- }
-
- void
- tinsertblank(int n)
- {
-- int dst, src, size;
-- Glyph *line;
-+ int src, dst, size;
-+ Line line;
-
-- LIMIT(n, 0, term.col - term.c.x);
--
-- dst = term.c.x + n;
-+ if (n <= 0)
-+ return;
-+ dst = MIN(term.c.x + n, term.col);
- src = term.c.x;
- size = term.col - dst;
-- line = term.line[term.c.y];
--
-- memmove(&line[dst], &line[src], size * sizeof(Glyph));
-- tclearregion(src, term.c.y, dst - 1, term.c.y);
-+ if (size > 0) { /* otherwise dst would point beyond the array */
-+ line = term.line[term.c.y];
-+ memmove(&line[dst], &line[src], size * sizeof(Glyph));
-+ }
-+ tclearregion(src, term.c.y, dst - 1, term.c.y, 1);
- }
-
- void
- tinsertblankline(int n)
- {
- if (BETWEEN(term.c.y, term.top, term.bot))
-- tscrolldown(term.c.y, n, 0);
-+ tscrolldown(term.c.y, n);
- }
-
- void
- tdeleteline(int n)
- {
- if (BETWEEN(term.c.y, term.top, term.bot))
-- tscrollup(term.c.y, n, 0);
-+ tscrollup(term.c.y, term.bot, n, SCROLL_NOSAVEHIST);
- }
-
- int32_t
-@@ -1528,7 +1695,7 @@ tsetscroll(int t, int b)
- void
- tsetmode(int priv, int set, const int *args, int narg)
- {
-- int alt; const int *lim;
-+ const int *lim;
-
- for (lim = args + narg; args < lim; ++args) {
- if (priv) {
-@@ -1589,25 +1756,18 @@ tsetmode(int priv, int set, const int *args, int narg)
- xsetmode(set, MODE_8BIT);
- break;
- case 1049: /* swap screen & set/restore cursor as xterm */
-- if (!allowaltscreen)
-- break;
-- tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
-- /* FALLTHROUGH */
- case 47: /* swap screen */
-- case 1047:
-+ case 1047: /* swap screen, clearing alternate screen */
- if (!allowaltscreen)
- break;
-- alt = IS_SET(MODE_ALTSCREEN);
-- if (alt) {
-- tclearregion(0, 0, term.col-1,
-- term.row-1);
-- }
-- if (set ^ alt) /* set is always 1 or 0 */
-- tswapscreen();
-- if (*args != 1049)
-- break;
-- /* FALLTHROUGH */
-+ if (set)
-+ tloadaltscreen(*args == 1049, *args == 1049);
-+ else
-+ tloaddefscreen(*args == 1047, *args == 1049);
-+ break;
- case 1048:
-+ if (!allowaltscreen)
-+ break;
- tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
- break;
- case 2004: /* 2004: bracketed paste mode */
-@@ -1659,7 +1819,7 @@ void
- csihandle(void)
- {
- char buf[40];
-- int len;
-+ int n, x;
-
- switch (csiescseq.mode[0]) {
- default:
-@@ -1757,20 +1917,30 @@ csihandle(void)
- case 'J': /* ED -- Clear screen */
- switch (csiescseq.arg[0]) {
- case 0: /* below */
-- tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-+ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
- if (term.c.y < term.row-1) {
-- tclearregion(0, term.c.y+1, term.col-1,
-- term.row-1);
-+ tclearregion(0, term.c.y+1, term.col-1, term.row-1, 1);
- }
- break;
- case 1: /* above */
-- if (term.c.y > 1)
-- tclearregion(0, 0, term.col-1, term.c.y-1);
-- tclearregion(0, term.c.y, term.c.x, term.c.y);
-+ if (term.c.y >= 1)
-+ tclearregion(0, 0, term.col-1, term.c.y-1, 1);
-+ tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
- break;
- case 2: /* all */
-- tclearregion(0, 0, term.col-1, term.row-1);
-- break;
-+ if (IS_SET(MODE_ALTSCREEN)) {
-+ tclearregion(0, 0, term.col-1, term.row-1, 1);
-+ break;
-+ }
-+ /* vte does this:
-+ tscrollup(0, term.row-1, term.row, SCROLL_SAVEHIST); */
-+
-+ /* alacritty does this: */
-+ for (n = term.row-1; n >= 0 && tlinelen(term.line[n]) == 0; n--);
-+ if (n >= 0)
-+ tscrollup(0, term.row-1, n+1, SCROLL_SAVEHIST);
-+ tscrollup(0, term.row-1, term.row-n-1, SCROLL_NOSAVEHIST);
-+ break;
- default:
- goto unknown;
- }
-@@ -1778,24 +1948,24 @@ csihandle(void)
- case 'K': /* EL -- Clear line */
- switch (csiescseq.arg[0]) {
- case 0: /* right */
-- tclearregion(term.c.x, term.c.y, term.col-1,
-- term.c.y);
-+ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
- break;
- case 1: /* left */
-- tclearregion(0, term.c.y, term.c.x, term.c.y);
-+ tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
- break;
- case 2: /* all */
-- tclearregion(0, term.c.y, term.col-1, term.c.y);
-+ tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
- break;
- }
- break;
- case 'S': /* SU -- Scroll <n> line up */
- DEFAULT(csiescseq.arg[0], 1);
-- tscrollup(term.top, csiescseq.arg[0], 0);
-+ /* xterm, urxvt, alacritty save this in history */
-+ tscrollup(term.top, term.bot, csiescseq.arg[0], SCROLL_SAVEHIST);
- break;
- case 'T': /* SD -- Scroll <n> line down */
- DEFAULT(csiescseq.arg[0], 1);
-- tscrolldown(term.top, csiescseq.arg[0], 0);
-+ tscrolldown(term.top, csiescseq.arg[0]);
- break;
- case 'L': /* IL -- Insert <n> blank lines */
- DEFAULT(csiescseq.arg[0], 1);
-@@ -1809,9 +1979,11 @@ csihandle(void)
- tdeleteline(csiescseq.arg[0]);
- break;
- case 'X': /* ECH -- Erase <n> char */
-+ if (csiescseq.arg[0] < 0)
-+ return;
- DEFAULT(csiescseq.arg[0], 1);
-- tclearregion(term.c.x, term.c.y,
-- term.c.x + csiescseq.arg[0] - 1, term.c.y);
-+ x = MIN(term.c.x + csiescseq.arg[0], term.col) - 1;
-+ tclearregion(term.c.x, term.c.y, x, term.c.y, 1);
- break;
- case 'P': /* DCH -- Delete <n> char */
- DEFAULT(csiescseq.arg[0], 1);
-@@ -1833,9 +2005,9 @@ csihandle(void)
- break;
- case 'n': /* DSR – Device Status Report (cursor position) */
- if (csiescseq.arg[0] == 6) {
-- len = snprintf(buf, sizeof(buf), "\033[%i;%iR",
-+ n = snprintf(buf, sizeof(buf), "\033[%i;%iR",
- term.c.y+1, term.c.x+1);
-- ttywrite(buf, len, 0);
-+ ttywrite(buf, n, 0);
- }
- break;
- case 'r': /* DECSTBM -- Set Scrolling Region */
-@@ -2128,16 +2300,8 @@ tdumpsel(void)
- void
- tdumpline(int n)
- {
-- char buf[UTF_SIZ];
-- const Glyph *bp, *end;
--
-- bp = &term.line[n][0];
-- end = &bp[MIN(tlinelen(n), term.col) - 1];
-- if (bp != end || bp->u != ' ') {
-- for ( ; bp <= end; ++bp)
-- tprinter(buf, utf8encode(bp->u, buf));
-- }
-- tprinter("\n", 1);
-+ char str[(term.col + 1) * UTF_SIZ];
-+ tprinter(str, tgetline(str, &term.line[n][0]));
- }
-
- void
-@@ -2358,7 +2522,7 @@ eschandle(uchar ascii)
- return 0;
- case 'D': /* IND -- Linefeed */
- if (term.c.y == term.bot) {
-- tscrollup(term.top, 1, 1);
-+ tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
- } else {
- tmoveto(term.c.x, term.c.y+1);
- }
-@@ -2371,7 +2535,7 @@ eschandle(uchar ascii)
- break;
- case 'M': /* RI -- Reverse index */
- if (term.c.y == term.top) {
-- tscrolldown(term.top, 1, 1);
-+ tscrolldown(term.top, 1);
- } else {
- tmoveto(term.c.x, term.c.y-1);
- }
-@@ -2511,7 +2675,8 @@ check_control_code:
- */
- return;
- }
-- if (selected(term.c.x, term.c.y))
-+ /* selected() takes relative coordinates */
-+ if (selected(term.c.x + term.scr, term.c.y + term.scr))
- selclear();
-
- gp = &term.line[term.c.y][term.c.x];
-@@ -2546,6 +2711,7 @@ check_control_code:
- if (term.c.x+width < term.col) {
- tmoveto(term.c.x+width, term.c.y);
- } else {
-+ term.wrapcwidth[IS_SET(MODE_ALTSCREEN)] = width;
- term.c.state |= CURSOR_WRAPNEXT;
- }
- }
-@@ -2583,93 +2749,275 @@ twrite(const char *buf, int buflen, int show_ctrl)
- }
-
- void
--tresize(int col, int row)
-+treflow(int col, int row)
- {
- int i, j;
-- int minrow = MIN(row, term.row);
-- int mincol = MIN(col, term.col);
-- int *bp;
-- TCursor c;
--
-- if (col < 1 || row < 1) {
-- fprintf(stderr,
-- "tresize: error resizing to %dx%d\n", col, row);
-- return;
-+ int oce, nce, bot, scr;
-+ int ox = 0, oy = -term.histf, nx = 0, ny = -1, len;
-+ int cy = -1; /* proxy for new y coordinate of cursor */
-+ int nlines;
-+ Line *buf, line;
-+
-+ /* y coordinate of cursor line end */
-+ for (oce = term.c.y; oce < term.row - 1 &&
-+ tiswrapped(term.line[oce]); oce++);
-+
-+ nlines = term.histf + oce + 1;
-+ if (col < term.col) {
-+ /* each line can take this many lines after reflow */
-+ j = (term.col + col - 1) / col;
-+ nlines = j * nlines;
-+ if (nlines > HISTSIZE + RESIZEBUFFER + row) {
-+ nlines = HISTSIZE + RESIZEBUFFER + row;
-+ oy = -(nlines / j - oce - 1);
-+ }
- }
-+ buf = xmalloc(nlines * sizeof(Line));
-+ do {
-+ if (!nx)
-+ buf[++ny] = xmalloc(col * sizeof(Glyph));
-+ if (!ox) {
-+ line = TLINEABS(oy);
-+ len = tlinelen(line);
-+ }
-+ if (oy == term.c.y) {
-+ if (!ox)
-+ len = MAX(len, term.c.x + 1);
-+ /* update cursor */
-+ if (cy < 0 && term.c.x - ox < col - nx) {
-+ term.c.x = nx + term.c.x - ox, cy = ny;
-+ UPDATEWRAPNEXT(0, col);
-+ }
-+ }
-+ /* get reflowed lines in buf */
-+ if (col - nx > len - ox) {
-+ memcpy(&buf[ny][nx], &line[ox], (len-ox) * sizeof(Glyph));
-+ nx += len - ox;
-+ if (len == 0 || !(line[len - 1].mode & ATTR_WRAP)) {
-+ for (j = nx; j < col; j++)
-+ tclearglyph(&buf[ny][j], 0);
-+ nx = 0;
-+ } else if (nx > 0) {
-+ buf[ny][nx - 1].mode &= ~ATTR_WRAP;
-+ }
-+ ox = 0, oy++;
-+ } else if (col - nx == len - ox) {
-+ memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph));
-+ ox = 0, oy++, nx = 0;
-+ } else/* if (col - nx < len - ox) */ {
-+ memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph));
-+ ox += col - nx;
-+ buf[ny][col - 1].mode |= ATTR_WRAP;
-+ nx = 0;
-+ }
-+ } while (oy <= oce);
-+ if (nx)
-+ for (j = nx; j < col; j++)
-+ tclearglyph(&buf[ny][j], 0);
-
-- /*
-- * slide screen to keep cursor where we expect it -
-- * tscrollup would work here, but we can optimize to
-- * memmove because we're freeing the earlier lines
-- */
-- for (i = 0; i <= term.c.y - row; i++) {
-+ /* free extra lines */
-+ for (i = row; i < term.row; i++)
- free(term.line[i]);
-- free(term.alt[i]);
-+ /* resize to new height */
-+ term.line = xrealloc(term.line, row * sizeof(Line));
-+
-+ bot = MIN(ny, row - 1);
-+ scr = MAX(row - term.row, 0);
-+ /* update y coordinate of cursor line end */
-+ nce = MIN(oce + scr, bot);
-+ /* update cursor y coordinate */
-+ term.c.y = nce - (ny - cy);
-+ if (term.c.y < 0) {
-+ j = nce, nce = MIN(nce + -term.c.y, bot);
-+ term.c.y += nce - j;
-+ while (term.c.y < 0) {
-+ free(buf[ny--]);
-+ term.c.y++;
-+ }
- }
-- /* ensure that both src and dst are not NULL */
-- if (i > 0) {
-- memmove(term.line, term.line + i, row * sizeof(Line));
-- memmove(term.alt, term.alt + i, row * sizeof(Line));
-+ /* allocate new rows */
-+ for (i = row - 1; i > nce; i--) {
-+ term.line[i] = xmalloc(col * sizeof(Glyph));
-+ for (j = 0; j < col; j++)
-+ tclearglyph(&term.line[i][j], 0);
- }
-- for (i += row; i < term.row; i++) {
-+ /* fill visible area */
-+ for (/*i = nce */; i >= term.row; i--, ny--)
-+ term.line[i] = buf[ny];
-+ for (/*i = term.row - 1 */; i >= 0; i--, ny--) {
- free(term.line[i]);
-- free(term.alt[i]);
-+ term.line[i] = buf[ny];
-+ }
-+ /* fill lines in history buffer and update term.histf */
-+ for (/*i = -1 */; ny >= 0 && i >= -HISTSIZE; i--, ny--) {
-+ j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE;
-+ free(term.hist[j]);
-+ term.hist[j] = buf[ny];
- }
-+ term.histf = -i - 1;
-+ term.scr = MIN(term.scr, term.histf);
-+ /* resize rest of the history lines */
-+ for (/*i = -term.histf - 1 */; i >= -HISTSIZE; i--) {
-+ j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE;
-+ term.hist[j] = xrealloc(term.hist[j], col * sizeof(Glyph));
-+ }
-+ free(buf);
-+}
-
-- /* resize to new height */
-- term.line = xrealloc(term.line, row * sizeof(Line));
-- term.alt = xrealloc(term.alt, row * sizeof(Line));
-- term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
-- term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
-+void
-+rscrolldown(int n)
-+{
-+ int i;
-+ Line temp;
-
-- for (i = 0; i < HISTSIZE; i++) {
-- term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph));
-- for (j = mincol; j < col; j++) {
-- term.hist[i][j] = term.c.attr;
-- term.hist[i][j].u = ' ';
-- }
-- }
-+ /* can never be true as of now
-+ if (IS_SET(MODE_ALTSCREEN))
-+ return; */
-
-- /* resize each row to new width, zero-pad if needed */
-- for (i = 0; i < minrow; i++) {
-- term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
-- term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
-- }
-+ if ((n = MIN(n, term.histf)) <= 0)
-+ return;
-
-- /* allocate any new rows */
-- for (/* i = minrow */; i < row; i++) {
-- term.line[i] = xmalloc(col * sizeof(Glyph));
-- term.alt[i] = xmalloc(col * sizeof(Glyph));
-+ for (i = term.c.y + n; i >= n; i--) {
-+ temp = term.line[i];
-+ term.line[i] = term.line[i-n];
-+ term.line[i-n] = temp;
- }
-+ for (/*i = n - 1 */; i >= 0; i--) {
-+ temp = term.line[i];
-+ term.line[i] = term.hist[term.histi];
-+ term.hist[term.histi] = temp;
-+ term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
-+ }
-+ term.c.y += n;
-+ term.histf -= n;
-+ if ((i = term.scr - n) >= 0) {
-+ term.scr = i;
-+ } else {
-+ term.scr = 0;
-+ if (sel.ob.x != -1 && !sel.alt)
-+ selmove(-i);
-+ }
-+}
-+
-+void
-+tresize(int col, int row)
-+{
-+ int *bp;
-+
-+ /* col and row are always MAX(_, 1)
-+ if (col < 1 || row < 1) {
-+ fprintf(stderr, "tresize: error resizing to %dx%d\n", col, row);
-+ return;
-+ } */
-+
-+ term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
-+ term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
- if (col > term.col) {
- bp = term.tabs + term.col;
--
- memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
- while (--bp > term.tabs && !*bp)
- /* nothing */ ;
- for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
- *bp = 1;
- }
-- /* update terminal size */
-- term.col = col;
-- term.row = row;
-- /* reset scrolling region */
-- tsetscroll(0, row-1);
-- /* make use of the LIMIT in tmoveto */
-- tmoveto(term.c.x, term.c.y);
-- /* Clearing both screens (it makes dirty all lines) */
-- c = term.c;
-- for (i = 0; i < 2; i++) {
-- if (mincol < col && 0 < minrow) {
-- tclearregion(mincol, 0, col - 1, minrow - 1);
-+
-+ if (IS_SET(MODE_ALTSCREEN))
-+ tresizealt(col, row);
-+ else
-+ tresizedef(col, row);
-+}
-+
-+void
-+tresizedef(int col, int row)
-+{
-+ int i, j;
-+
-+ /* return if dimensions haven't changed */
-+ if (term.col == col && term.row == row) {
-+ tfulldirt();
-+ return;
-+ }
-+ if (col != term.col) {
-+ if (!sel.alt)
-+ selremove();
-+ treflow(col, row);
-+ } else {
-+ /* slide screen up if otherwise cursor would get out of the screen */
-+ if (term.c.y >= row) {
-+ tscrollup(0, term.row - 1, term.c.y - row + 1, SCROLL_RESIZE);
-+ term.c.y = row - 1;
- }
-- if (0 < col && minrow < row) {
-- tclearregion(0, minrow, col - 1, row - 1);
-+ for (i = row; i < term.row; i++)
-+ free(term.line[i]);
-+
-+ /* resize to new height */
-+ term.line = xrealloc(term.line, row * sizeof(Line));
-+ /* allocate any new rows */
-+ for (i = term.row; i < row; i++) {
-+ term.line[i] = xmalloc(col * sizeof(Glyph));
-+ for (j = 0; j < col; j++)
-+ tclearglyph(&term.line[i][j], 0);
- }
-- tswapscreen();
-- tcursor(CURSOR_LOAD);
-+ /* scroll down as much as height has increased */
-+ rscrolldown(row - term.row);
-+ }
-+ /* update terminal size */
-+ term.col = col, term.row = row;
-+ /* reset scrolling region */
-+ term.top = 0, term.bot = row - 1;
-+ /* dirty all lines */
-+ tfulldirt();
-+}
-+
-+void
-+tresizealt(int col, int row)
-+{
-+ int i, j;
-+
-+ /* return if dimensions haven't changed */
-+ if (term.col == col && term.row == row) {
-+ tfulldirt();
-+ return;
- }
-- term.c = c;
-+ if (sel.alt)
-+ selremove();
-+ /* slide screen up if otherwise cursor would get out of the screen */
-+ for (i = 0; i <= term.c.y - row; i++)
-+ free(term.line[i]);
-+ if (i > 0) {
-+ /* ensure that both src and dst are not NULL */
-+ memmove(term.line, term.line + i, row * sizeof(Line));
-+ term.c.y = row - 1;
-+ }
-+ for (i += row; i < term.row; i++)
-+ free(term.line[i]);
-+ /* resize to new height */
-+ term.line = xrealloc(term.line, row * sizeof(Line));
-+ /* resize to new width */
-+ for (i = 0; i < MIN(row, term.row); i++) {
-+ term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
-+ for (j = term.col; j < col; j++)
-+ tclearglyph(&term.line[i][j], 0);
-+ }
-+ /* allocate any new rows */
-+ for (/*i = MIN(row, term.row) */; i < row; i++) {
-+ term.line[i] = xmalloc(col * sizeof(Glyph));
-+ for (j = 0; j < col; j++)
-+ tclearglyph(&term.line[i][j], 0);
-+ }
-+ /* update cursor */
-+ if (term.c.x >= col) {
-+ term.c.state &= ~CURSOR_WRAPNEXT;
-+ term.c.x = col - 1;
-+ } else {
-+ UPDATEWRAPNEXT(1, col);
-+ }
-+ /* update terminal size */
-+ term.col = col, term.row = row;
-+ /* reset scrolling region */
-+ term.top = 0, term.bot = row - 1;
-+ /* dirty all lines */
-+ tfulldirt();
- }
-
- void
-@@ -2709,9 +3057,8 @@ draw(void)
- cx--;
-
- drawregion(0, 0, term.col, term.row);
-- if (term.scr == 0)
-- xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
-- term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
-+ xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
-+ term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
- term.ocx = cx;
- term.ocy = term.c.y;
- xfinishdraw();
-diff --git a/st.h b/st.h
-index 818a6f8..514ec08 100644
---- a/st.h
-+++ b/st.h
-@@ -22,17 +22,19 @@
-
- enum glyph_attribute {
- ATTR_NULL = 0,
-- ATTR_BOLD = 1 << 0,
-- ATTR_FAINT = 1 << 1,
-- ATTR_ITALIC = 1 << 2,
-- ATTR_UNDERLINE = 1 << 3,
-- ATTR_BLINK = 1 << 4,
-- ATTR_REVERSE = 1 << 5,
-- ATTR_INVISIBLE = 1 << 6,
-- ATTR_STRUCK = 1 << 7,
-- ATTR_WRAP = 1 << 8,
-- ATTR_WIDE = 1 << 9,
-- ATTR_WDUMMY = 1 << 10,
-+ ATTR_SET = 1 << 0,
-+ ATTR_BOLD = 1 << 1,
-+ ATTR_FAINT = 1 << 2,
-+ ATTR_ITALIC = 1 << 3,
-+ ATTR_UNDERLINE = 1 << 4,
-+ ATTR_BLINK = 1 << 5,
-+ ATTR_REVERSE = 1 << 6,
-+ ATTR_INVISIBLE = 1 << 7,
-+ ATTR_STRUCK = 1 << 8,
-+ ATTR_WRAP = 1 << 9,
-+ ATTR_WIDE = 1 << 10,
-+ ATTR_WDUMMY = 1 << 11,
-+ ATTR_SELECTED = 1 << 12,
- ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
- };
-
-@@ -90,6 +92,7 @@ void toggleprinter(const Arg *);
-
- int tattrset(int);
- void tnew(int, int);
-+int tisaltscreen(void);
- void tresize(int, int);
- void tsetdirtattr(int);
- void ttyhangup(void);