st-meta-vim-full: change currentBg, introduce currentFg, update shortcuts

This patch is an update to the 20210604, which fixes zoomreset.

Because the cyclefonts function doesn't change the defaultfontsize
variable, zoomreset function resets all fonts to the size of the first
one loaded.

With this patch, zoomreset will reset the font to the specified fontsize

Makefile

@@ -15,7 +15,7 @@ config.h:
 .c.o:
 	$(CC) $(STCFLAGS) -c $<
 
-st.o: config.h st.h win.h
+st.o: config.h st.h win.h normalMode.h normalMode.c utils.h
 x.o: arg.h config.h st.h win.h
 
 $(OBJ): config.h config.mk

config.def.h

@@ -5,7 +5,15 @@
  *
  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
  */
-static char *font = "FiraCode Nerd Font:size=10";
+static char *fonts[] = {
+	"FiraCode Nerd Font:size=10",
+	"Monaspace Neon:size=10",
+	"Monaspace Argon:size=10",
+	"Monaspace Xenon:size=10",
+	"Monaspace Radon:size=10",
+	"Monaspace Krypton:size=10",
+};
+static size_t currentfont = 0;
 static int borderpx = 2;
 
 
@@ -167,6 +175,20 @@ unsigned int defaultfg = 258;
 unsigned int defaultbg = 259;
 unsigned int defaultcs = 256;
 static unsigned int defaultrcs = 257;
+unsigned int const currentBg = 179, currentFg = 0, buffSize = 2048;
+/// Enable double / triple click yanking / selection of word / line.
+int const mouseYank = 1, mouseSelect = 0;
+/// [Vim Browse] Colors for search results currently on screen.
+unsigned int const highlightBg = 160, highlightFg = 15;
+char const wDelS[] = "!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", wDelL[] = " \t";
+char *nmKeys [] = {              ///< Shortcusts executed in normal mode
+	"P/lupan@\nN", "F/: error:\nN", "f/: error:\n", "DQf"
+};
+unsigned int const amountNmKeys = sizeof(nmKeys) / sizeof(*nmKeys);
+/// Style of the {command, search} string shown in the right corner (y,v,V,/)
+Glyph styleSearch = {' ', ATTR_ITALIC | ATTR_BOLD_FAINT, 7, 16};
+Glyph style[] = {{' ',ATTR_ITALIC|ATTR_FAINT,15,16}, {' ',ATTR_ITALIC,232,11},
+                 {' ', ATTR_ITALIC, 232, 4}, {' ', ATTR_ITALIC, 232, 12}};
 
 /*
  * Default shape of cursor
@@ -238,8 +260,8 @@ static Shortcut shortcuts[] = {
 	{ TERMMOD,              XK_I,           externalpipepaste, { 0 } },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
-	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
-	{ ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
+	{ MODKEY,               XK_c,           normalMode,     {.i =  0} },
+	{ TERMMOD,              XK_S,           cyclefonts,     {}        },
 };
 
 /*

normalMode.c

@@ -0,0 +1,284 @@
+#include <X11/keysym.h>
+#include <X11/XKBlib.h>
+
+#include "normalMode.h"
+#include "utils.h"
+
+extern Glyph const styleSearch, style[];
+extern char const wDelS[], wDelL[], *nmKeys[];
+extern unsigned int bg[], fg, currentBg, currentFg, highlightBg, highlightFg, amountNmKeys;
+
+typedef struct { int p[3]; } Pos;
+
+typedef enum {visual='v', visualLine='V', yank = 'y'} Op;
+typedef enum {infix_none=0, infix_i='i', infix_a='a'} Infix;
+typedef enum {fw='/', bw='?'} Search;
+struct NormalModeState {
+	struct OperationState { Op op; Infix infix; } cmd;
+	struct MotionState { uint32_t c; int active; Pos searchPos; Search search; } m;
+} defaultNormalMode, state;
+
+DynamicArray searchStr=UTF8_ARRAY, cCmd=UTF8_ARRAY, lCmd=UTF8_ARRAY;
+Glyph styleCmd;
+char posBuffer[10], braces[6][3] = { {"()"}, {"<>"}, {"{}"}, {"[]"}, {"\"\""}, {"''"}};
+int exited=1, overlay=1;
+static inline Rune cChar() { return term.line[term.c.y][term.c.x].u; }
+static inline int pos(int p, int h) {return IS_SET(MODE_ALTSCREEN)?p:rangeY(p+h*histOff-insertOff);}
+static inline int contains(Rune l, char const * values, size_t const memSize) {
+	for (uint32_t i = 0; i < memSize; ++i) if (l == values[i]) return 1;
+	return 0;
+}
+static inline void decodeTo(char const *cs, size_t len, DynamicArray *arr) {
+	char *var = expand(arr);
+	if (!var) empty(arr); else utf8decode(cs, (Rune*)(var), len);
+}
+static inline void applyPos(Pos p) {
+	term.c.x = p.p[0], term.c.y = p.p[1];
+	if (!IS_SET(MODE_ALTSCREEN) && histOp) term.line = &buf[histOff = p.p[2]];
+}
+/// Find string in history buffer, and provide string-match-lookup for highlighting matches
+static int highlighted(int x, int y) {
+	int const s=term.row*term.col, i=y*term.col+x, sz=size(&searchStr);
+	return sz && i<s && mark[i]!=sz && i+mark[i]<s && !mark[i+mark[i]];
+}
+static void markSearchMatches(int all) {
+	int sz = size(&searchStr), ox = 0, oy = 0, oi=0;
+	for (int y=0; sz && all && y<term.row; ++y)
+		for (int x=0; x<term.col; ++x) term.dirty[y] |= highlighted(x, y);
+	for (int y = 0, wi=0, owi=0, i=0; sz && y < term.row; ++y)
+		for (int x=0; x<term.col; ++x, wi%=sz, ++i, owi=wi)
+			if (all || term.dirty[y]) {
+				mark[i]=sz-(wi=(getU32(&searchStr,wi,1)==term.line[y][x].u?wi+1:0));
+				if (wi==1) ox=x, oy=y, oi=i; else if (!wi && owi) x=ox, y=oy, i=oi;
+			}
+	for (int y=0; sz &&all &&y<term.row; ++y)
+		for (int x=0; x<term.col; ++x) term.dirty[y] |= highlighted(x, y);
+}
+static int findString(int s, int all) {
+	Pos p = (Pos) {.p={term.c.x, term.c.y, IS_SET(MODE_ALTSCREEN) ? 0 : histOff}};
+	historyMove(s, 0, 0);
+	uint32_t strSz=size(&searchStr), maxIter=rows()*term.col+strSz, wIdx=0;
+	for (uint32_t i=0, wi = 0; wIdx<strSz && ++i<=maxIter; historyMove(s, 0, 0), wi=wIdx) {
+		wIdx = (getU32(&searchStr, wIdx, s>0)==cChar())?wIdx+1:0;
+		if (wi && !wIdx) historyMove(-(int)(s*wi), 0, 0);
+	}
+	if (wIdx == strSz && wIdx) historyMove(-(int)(s*strSz), 0, 0);
+	else applyPos(p);
+	markSearchMatches(all);
+	return wIdx == strSz;
+}
+/// Execute series of normal-mode commands from char array / decoded from dynamic array
+ExitState pressKeys(char const* s, size_t e) {
+	ExitState x=success;
+	for (size_t i=0; i<e && (x=(!s[i] ? x : kPressHist(&s[i], 1, 0, NULL))); ++i);
+	return x;
+}
+static ExitState executeCommand(uint32_t *cs, size_t z) {
+	ExitState x=success;
+	char dc [32];
+	for (size_t i=0; i<z && (x=kPressHist(dc, utf8encode(cs[i],dc),0,NULL));++i);
+	return x;
+}
+/// Get character for overlay, if the overlay (st) has something to show, else normal char.
+static void getChar(DynamicArray *st, Glyph *glyphChange, int y, int xEnd, int width, int x) {
+	if (x < xEnd - min(min(width,xEnd), size(st))) *glyphChange = term.line[y][x];
+	else if (x<xEnd) glyphChange->u = *((Rune*)(st->content + (size(st)+x-xEnd)*st->elSize));
+}
+/// Expand "infix" expression: for instance (w =>)       l     b     |   | v     e    |   | y
+static ExitState expandExpression(char l) { //    ({ =>)       l  ?  {  \n | l | v  /  } \n | h | y
+	int a=state.cmd.infix==infix_a, yank=state.cmd.op=='y', lc=tolower(l), found=1;
+	state.cmd.infix = infix_none;
+	if(!yank && state.cmd.op!=visual && state.cmd.op!=visualLine) return failed;
+	char mot[11] = {'l', 0, 'b', 0, 0, 'v', 0, 'e', 0, 0, (char)(yank ? 'y' : 0)};
+	if (lc == 'w') mot[2] = (char) ('b' - lc + l), mot[7] = (char) ((a ? 'w' : 'e') - lc + l), mot[9]=(char)(a?'h':0);
+	else {
+		mot[1]='?', mot[3]=mot[8]='\n', mot[6]='/', mot[4]=(char)(a?0:'l'), mot[9]=(char)(a?0:'h');
+		for (int i=found=0; !found && i < 6; ++i)
+			if ((found=contains(l,braces[i],2))) mot[2]=braces[i][0], mot[7]=braces[i][1];
+	}
+	if (!found) return failed;
+	assign(&lCmd, &cCmd);
+	empty(&cCmd);
+	state.cmd = defaultNormalMode.cmd;
+	return pressKeys(mot, 11);
+}
+
+ExitState executeMotion(char const cs, KeySym const *const ks) {
+	state.m.c = state.m.c < 1u ? 1u : state.m.c;
+	if      (ks && *ks == XK_d) historyMove(0, 0, term.row / 2);
+	else if (ks && *ks == XK_u) historyMove(0, 0, -term.row / 2);
+	else if (ks && *ks == XK_f) historyMove(0, 0, term.row-1+(term.c.y=0));
+	else if (ks && *ks == XK_b) historyMove(0, 0, -(term.c.y=term.row-1));
+	else if (ks && *ks == XK_h) overlay = !overlay;
+	else if (cs == 'K') historyMove(0, 0, -(int)state.m.c);
+	else if (cs == 'J') historyMove(0, 0,  (int)state.m.c);
+	else if (cs == 'k') historyMove(0, -(int)state.m.c, 0);
+	else if (cs == 'j') historyMove(0,  (int)state.m.c, 0);
+	else if (cs == 'h') historyMove(-(int)state.m.c, 0, 0);
+	else if (cs == 'l') historyMove( (int)state.m.c, 0, 0);
+	else if (cs == 'H') term.c.y = 0;
+	else if (cs == 'M') term.c.y = term.bot / 2;
+	else if (cs == 'L') term.c.y = term.bot;
+	else if (cs == 's' || cs == 'S') altToggle = cs == 's' ? !altToggle : 1;
+	else if (cs == 'G' || cs == 'g') {
+		if (cs == 'G') term.c = c[0] = c[IS_SET(MODE_ALTSCREEN)+1];
+		if (!IS_SET(MODE_ALTSCREEN)) term.line = &buf[histOff=insertOff];
+	} else if (cs == '0') term.c.x = 0;
+	else if (cs == '$') term.c.x = term.col-1;
+	else if (cs == 't') sel.type = sel.type==SEL_REGULAR ? SEL_RECTANGULAR : SEL_REGULAR;
+	else if (cs == 'n' || cs == 'N') {
+		int const d = ((cs=='N')!=(state.m.search==bw))?-1:1;
+		for (uint32_t i = state.m.c; i && findString(d, 0); --i);
+	} else if (contains(cs, "wWeEbB", 6)) {
+		int const low=cs<=90, off=tolower(cs)!='w', sgn=(tolower(cs)=='b')?-1:1;
+		size_t const l=strlen(wDelL), s=strlen(wDelS), maxIt=rows()*term.col;
+		for (int it=0, on=0; state.m.c > 0 && it < maxIt; ++it) {
+		    // If an offset is to be performed in beginning or not in beginning, move in history.
+			if ((off || it) && historyMove(sgn, 0, 0)) break;
+			// Determine if the category of the current letter changed since last iteration.
+			int n = 1<<(contains(cChar(),wDelS,s) ?(2-low) :!contains(cChar(),wDelL,l)),
+			    found = (on|=n)^n && ((off ?on^n :n)!=1);
+			// If a reverse offset is to be performed and this is the last letter:
+			if (found && off) historyMove(-sgn, 0, 0);
+			// Terminate iteration: reset #it and old n value #on and decrease operation count:
+			if (found) it=-1, on=0, --state.m.c;
+		}
+	} else return failed;
+	state.m.c = 0;
+	return state.cmd.op == yank ? exitMotion : success;
+}
+
+ExitState kPressHist(char const *cs, size_t len, int ctrl, KeySym const *kSym) {
+	historyOpToggle(1, 1);
+	int const prevYOff=IS_SET(MODE_ALTSCREEN)?0:histOff, search=state.m.search&&state.m.active,
+	          prevAltToggle=altToggle, prevOverlay=overlay;
+	int const noOp=!state.cmd.op&&!state.cmd.infix, num=len==1&&BETWEEN(cs[0],48,57),
+	          esc=kSym&&*kSym==XK_Escape, ret=(kSym&&*kSym==XK_Return)||(len==1&&cs[0]=='\n'),
+	          quantifier=num&&(cs[0]!='0'||state.m.c), ins=!search &&noOp &&len &&cs[0]=='i';
+	exited = 0;
+	ExitState result = success;
+	if (esc || ret || ins) { result = exitMotion, len = 0;
+	} else if (kSym && *kSym == XK_BackSpace) {
+		if ((search || state.m.c) && size(&cCmd)) pop(&cCmd);
+		if (search) {
+			if (size(&searchStr)) pop(&searchStr);
+			else result = exitMotion;
+			if (!size(&searchStr)) tfulldirt();
+			applyPos(state.m.searchPos);
+			findString(state.m.search==fw ? 1 : -1, 1);
+		} else if (state.m.c) state.m.c /= 10;
+		len = 0;
+	} else if (search) {
+		if (len >= 1) decodeTo(cs, len, &searchStr);
+		applyPos(state.m.searchPos);
+		findString(state.m.search==fw ? 1 : -1, 1);
+	} else if (len == 0) { result = failed;
+	} else if (quantifier) { state.m.c = min(SHRT_MAX, (int)state.m.c*10+cs[0]-48);
+	} else if (state.cmd.infix && state.cmd.op && (result = expandExpression(cs[0]), len=0)) {
+    } else if (cs[0] == 'd') { state = defaultNormalMode; result = exitMotion; state.m.active = 1;
+	} else if (cs[0] == '.') {
+		if (size(&cCmd)) assign(&lCmd, &cCmd);
+		empty(&cCmd);
+		executeCommand((uint32_t*) lCmd.content, size(&lCmd));
+		empty(&cCmd);
+		len = 0;
+	} else if (cs[0] == 'r') { tfulldirt();
+	} else if (cs[0] == 'c') {
+		empty(&lCmd);
+		empty(&cCmd);
+		empty(&searchStr);
+		tfulldirt();
+		len = 0;
+	} else if (cs[0] == fw || cs[0] == bw) {
+		empty(&searchStr);
+		state.m.search = (Search) cs[0];
+		state.m.searchPos = (Pos){.p={term.c.x, term.c.y, prevYOff}};
+		state.m.active = 1;
+	} else if (cs[0]==infix_i || cs[0]==infix_a) { state.cmd.infix=(Infix) cs[0];
+	} else if (cs[0] == 'y') {
+		if (state.cmd.op) {
+			result = (state.cmd.op == yank || state.cmd.op == visualLine) ? exitOp : exitMotion;
+			if (state.cmd.op == yank) selstart(0, term.c.y, 0);
+		} else selstart(term.c.x, term.c.y, 0);
+		state.cmd.op = yank;
+	} else if (cs[0] == visual || cs[0] == visualLine) {
+		if (state.cmd.op != (Op) cs[0]) {
+			state.cmd = defaultNormalMode.cmd;
+			state.cmd.op = (Op) cs[0];
+			selstart(cs[0] == visualLine ?0 :term.c.x, term.c.y, 0);
+		} else result = exitOp;
+	} else if (!(result =executeMotion((char) (len?cs[0]:0), ctrl?kSym:NULL))) {
+		result=failed;
+		for (size_t i = 0; !ctrl && i < amountNmKeys; ++i)
+			if (cs[0]==nmKeys[i][0] &&
+			   failed!=(result=pressKeys(&nmKeys[i][1], strlen(nmKeys[i])-1))) goto end;
+	} // Operation/Motion finished if valid: update cmd string, extend selection, update search
+	if (result != failed) {
+		if (len == 1 && !ctrl) decodeTo(cs, len, &cCmd);
+		if ((state.cmd.op == visualLine) || ((state.cmd.op == yank) && (result == exitOp))) {
+			int const off = term.c.y + (IS_SET(MODE_ALTSCREEN) ? 0 : histOff) < sel.ob.y; //< Selection start below end.
+			sel.ob.x = off ? term.col - 1 : 0;
+			selextend(off ? 0 : term.col-1, term.c.y, sel.type, 0);
+		} else if (sel.oe.x != -1) {
+			selextend(term.c.x, term.c.y, sel.type, 0);
+		}
+	} // Set repaint for motion or status bar
+	if (!IS_SET(MODE_ALTSCREEN) && prevYOff != histOff) tfulldirt();
+	// Terminate Motion / operation if thus indicated
+	if (result == exitMotion) {
+		if (!state.m.active) result = (exited=noOp) ? finish : exitOp;
+		 state.m.active = (int) (state.m.c = 0u);
+	}
+	if (result == exitOp || result == finish) {
+		if (state.cmd.op == yank) {
+			xsetsel(getsel());
+			xclipcopy();
+		}
+		state = defaultNormalMode;
+		selclear();
+		if (!esc) assign(&lCmd, &cCmd);
+		empty(&cCmd);
+	} // Update the content displayed in the history overlay
+	styleCmd = style[state.cmd.op==yank ? 1 : (state.cmd.op==visual ? 2 :
+	                (state.cmd.op==visualLine ? 3 :0))];
+	int const posLin = !IS_SET(MODE_ALTSCREEN) ? rangeY(insertOff-histOff):0, h=rows()-term.row;
+	if (!posLin || posLin==h || !h) strcpy(posBuffer, posLin ? " [BOT] " : " [TOP] ");
+	else sprintf(posBuffer, " % 3d%c  ", min(100, max(0, (int)(.5 + posLin * 100. / h))),'%');
+	if ((overlay || overlay!=prevOverlay) && term.col>9 && term.row>4) {
+		if (!term.dirty[term.row-1]) xdrawline(term.line[term.row-1], term.col*2/3, term.row-1, term.col-1);
+		if (!term.dirty[term.row-2]) xdrawline(term.line[term.row-2], term.col*2/3, term.row-2, term.col-1);
+	}
+	if (result==finish) altToggle = 0;
+	if (altToggle != prevAltToggle) tswapscreen();
+end:
+	historyOpToggle(-1, 1);
+	return result;
+}
+
+void historyOverlay(int x, int y, Glyph* g) {
+	if (!histMode) return;
+	TCursor const *cHist = histOp ? &term.c : &c[0];
+	if(overlay && term.col > 9 && term.row > 4 && (x > (2*term.col/3)) && (y >= (term.row-2))) {
+		*g = (y == term.row - 2) ? styleSearch : styleCmd;
+		if (y == term.row-2) getChar(&searchStr, g, term.row-2, term.col-2, term.col/3, x);
+		else if (x > term.col - 7) g->u = (Rune)(posBuffer[x - term.col + 7]);
+		else getChar(size(&cCmd) ?&cCmd :&lCmd, g, term.row-1, term.col-7, term.col/3-6, x);
+	} else if (highlighted(x, y)) g->bg = highlightBg, g->fg = highlightFg;
+	else if ((x==cHist->x) ^ (y==cHist->y)) { g->bg = currentBg; g->fg = currentFg; }
+	else if (x==cHist->x) g->mode^=ATTR_REVERSE;
+}
+void historyPreDraw() {
+	static Pos op = {.p={0, 0, 0}};
+	historyOpToggle(1, 0);
+	// Draw the cursor cross if changed
+	if (term.c.y >= term.row || op.p[1] >= term.row) tfulldirt();
+	else if (exited || (op.p[1] != term.c.y)) term.dirty[term.c.y] = term.dirty[op.p[1]] = 1;
+	for (int i=0; (exited || term.c.x != op.p[0]) && i<term.row; ++i) if (!term.dirty[i]) {
+		xdrawline(term.line[i], term.c.x, i, term.c.x + 1);
+		xdrawline(term.line[i], op.p[0], i, op.p[0] + 1);
+	}
+	// Update search results either only for lines with new content or all results if exiting
+	markSearchMatches(exited);
+	op = (Pos){.p = {term.c.x, term.c.y, 0}};
+	historyOpToggle(-1, 0);
+}

normalMode.h

@@ -0,0 +1,8 @@
+void normalMode();
+void historyPreDraw();
+void historyOverlay(int x, int y, Glyph* g);
+void historyModeToggle(int start);
+void historyOpToggle(int, int);
+typedef enum {failed=0, success=1, exitMotion=2, exitOp=3, finish=4} ExitState;
+ExitState kPressHist(char const *txt, size_t len, int ctrl, KeySym const *kSym);
+ExitState pressKeys(char const* s, size_t e);

st.h

@@ -4,45 +4,55 @@
 #include <sys/types.h>
 
 /* macros */
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) < (b) ? (b) : (a))
-#define LEN(a) (sizeof(a) / sizeof(a)[0])
-#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
-#define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d))
-#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
-#define LIMIT(x, a, b) (x) = (x)<(a) ? (a) : (x)>(b) ? (b) : (x)
-#define ATTRCMP(a, b)                                                          \
-  ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
-#define TIMEDIFF(t1, t2)                                                       \
-  ((t1.tv_sec - t2.tv_sec) * 1000 + (t1.tv_nsec - t2.tv_nsec) / 1E6)
-#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
+#define MIN(a, b)		((a) < (b) ? (a) : (b))
+#define MAX(a, b)		((a) < (b) ? (b) : (a))
+#define LEN(a)			(sizeof(a) / sizeof(a)[0])
+#define BETWEEN(x, a, b)	((a) <= (x) && (x) <= (b))
+#define OUT(x, a, b)		((a) <= (x) || (x) <= (b))
+#define DIVCEIL(n, d)		(((n) + ((d) - 1)) / (d))
+#define DEFAULT(a, b)		(a) = (a) ? (a) : (b)
+#define LIMIT(x, a, b)		(x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
+#define ATTRCMP(a, b)		((a).mode != (b).mode || (a).fg != (b).fg || \
+				(a).bg != (b).bg)
+#define TIMEDIFF(t1, t2)	((t1.tv_sec-t2.tv_sec)*1000 + \
+				(t1.tv_nsec-t2.tv_nsec)/1E6)
+#define MODBIT(x, set, bit)	((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
 
-#define TRUECOLOR(r, g, b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
-#define IS_TRUECOL(x) (1 << 24 & (x))
-#define HISTSIZE 2000
+#define TRUECOLOR(r,g,b)	(1 << 24 | (r) << 16 | (g) << 8 | (b))
+#define IS_TRUECOL(x)		(1 << 24 & (x))
 
 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_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
-  ATTR_URL = 1 << 14,
+	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_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+	ATTR_URL	= 1 << 14,
 };
 
-enum selection_mode { SEL_IDLE = 0, SEL_EMPTY = 1, SEL_READY = 2 };
+enum selection_mode {
+	SEL_IDLE = 0,
+	SEL_EMPTY = 1,
+	SEL_READY = 2
+};
 
-enum selection_type { SEL_REGULAR = 1, SEL_RECTANGULAR = 2 };
+enum selection_type {
+	SEL_REGULAR = 1,
+	SEL_RECTANGULAR = 2
+};
 
-enum selection_snap { SNAP_WORD = 1, SNAP_LINE = 2 };
+enum selection_snap {
+	SNAP_WORD = 1,
+	SNAP_LINE = 2
+};
 
 typedef unsigned char uchar;
 typedef unsigned int uint;
@@ -53,20 +63,20 @@ typedef uint_least32_t Rune;
 
 #define Glyph Glyph_
 typedef struct {
-  Rune u;      /* character code */
-  ushort mode; /* attribute flags */
-  uint32_t fg; /* foreground  */
-  uint32_t bg; /* background  */
+	Rune u;           /* character code */
+	ushort mode;      /* attribute flags */
+	uint32_t fg;      /* foreground  */
+	uint32_t bg;      /* background  */
 } Glyph;
 
 typedef Glyph *Line;
 
 typedef union {
-  int i;
-  uint ui;
-  float f;
-  const void *v;
-  const char *s;
+	int i;
+	uint ui;
+	float f;
+	const void *v;
+	const char *s;
 } Arg;
 
 void die(const char *, ...);
@@ -84,6 +94,7 @@ void toggleprinter(const Arg *);
 int tattrset(int);
 void tnew(int, int);
 void tresize(int, int);
+void tmoveto(int x, int y);
 void tsetdirtattr(int);
 void ttyhangup(void);
 int ttynew(const char *, char *, const char *, char **);

st.info

@@ -161,7 +161,7 @@ st-mono| simpleterm monocolor,
 	rin=\E[%p1%dT,
 	ritm=\E[23m,
 	rmacs=\E(B,
-	rmcup=\E[?1049l,
+	rmcup=\E[?1049l\E[23;0;0t,
 	rmir=\E[4l,
 	rmkx=\E[?1l\E>,
 	rmso=\E[27m,
@@ -172,7 +172,7 @@ st-mono| simpleterm monocolor,
 	sitm=\E[3m,
 	sgr0=\E[0m,
 	smacs=\E(0,
-	smcup=\E[?1049h,
+	smcup=\E[?1049h\E[22;0;0t,
 	smir=\E[4h,
 	smkx=\E[?1h\E=,
 	smso=\E[7m,

utils.h

@@ -0,0 +1,23 @@
+/// Dynamic memory-chunk, with (1) datatype size, (2/3) initialized / allocated chunk, (4) content
+typedef struct { uint8_t const elSize; uint32_t init, alloc; char* content; } DynamicArray;
+#define UTF8_ARRAY {4, 0, 0, NULL}
+
+static inline int p_alloc(DynamicArray *s, uint32_t amount) {
+	uint32_t const diff=s->init+s->elSize*amount-s->alloc, nas=s->alloc+max(diff,15)*s->elSize;
+	if (s->alloc < s->init + s->elSize * amount) {
+		char* tmp = realloc(s->content, nas);
+		if (!tmp) return 0;
+		s->alloc = nas, s->content = tmp;
+	}
+	return 1;
+}
+static inline char *view(DynamicArray * s, uint32_t i) { return s->content + i*s->elSize; }
+static inline char *end(DynamicArray *s, uint32_t i) { return s->content +s->init-(i+1)*s->elSize; }
+static inline uint32_t getU32(DynamicArray* s, uint32_t i, int b) { return *((uint32_t*) (b ?view(s,i) :end(s,i))); }
+static char *expand(DynamicArray *s) { if (!p_alloc(s, 1)) return NULL; s->init += s->elSize; return end(s, 0); }
+static inline void pop(DynamicArray* s) { s->init -= s->elSize; }
+static inline void empty(DynamicArray* s) { s->init = 0; }
+static inline int size(DynamicArray const * s) { return s->init / s->elSize; }
+static inline void assign(DynamicArray* s, DynamicArray const *o) { 
+	if (p_alloc(s, size(o))) memcpy(s->content, o->content, (s->init=o->init));
+}

win.h

@@ -19,6 +19,7 @@ enum win_mode {
 	MODE_MOUSEMANY   = 1 << 15,
 	MODE_BRCKTPASTE  = 1 << 16,
 	MODE_NUMLOCK     = 1 << 17,
+	MODE_NORMAL      = 1 << 18,
 	MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 	                  |MODE_MOUSEMANY,
 };
@@ -32,7 +33,9 @@ void xloadcols(void);
 int xsetcolorname(int, const char *);
 int xgetcolor(int, unsigned char *, unsigned char *, unsigned char *);
 void xseticontitle(char *);
-void xsettitle(char *);
+void xfreetitlestack(void);
+void xsettitle(char *, int);
+void xpushtitle(void);
 int xsetcursor(int);
 void xsetmode(int, unsigned int);
 void xsetpointermotion(int);

x.c

@@ -20,6 +20,7 @@ char *argv0;
 #include "arg.h"
 #include "st.h"
 #include "win.h"
+#include "normalMode.h"
 
 /* types used in config.h */
 typedef struct {
@@ -60,8 +61,7 @@ static void zoom(const Arg *);
 static void zoomabs(const Arg *);
 static void zoomreset(const Arg *);
 static void ttysend(const Arg *);
-void kscrollup(const Arg *);
-void kscrolldown(const Arg *);
+static void cyclefonts(const Arg *);
 
 /* config.h for applying patches and the configuration. */
 #include "config.h"
@@ -76,6 +76,9 @@ char **externalpastecmd()
 	return (lightmode) ? externalpastelightcmd : externalpastedarkcmd;
 }
 
+/* size of title stack */
+#define TITLESTACKSIZE 8
+
 /* XEMBED messages */
 #define XEMBED_FOCUS_IN  4
 #define XEMBED_FOCUS_OUT 5
@@ -234,6 +237,8 @@ static DC dc;
 static XWindow xw;
 static XSelection xsel;
 static TermWindow win;
+static int tstki; /* title stack index */
+static char *titlestack[TITLESTACKSIZE]; /* title stack */
 
 /* Font Ring Cache */
 enum {
@@ -275,6 +280,7 @@ clipcopy(const Arg *dummy)
 
 	free(xsel.clipboard);
 	xsel.clipboard = NULL;
+	xsetsel(getsel());
 
 	if (xsel.primary != NULL) {
 		xsel.clipboard = xstrdup(xsel.primary);
@@ -329,11 +335,7 @@ void
 zoomreset(const Arg *arg)
 {
 	Arg larg;
-
-	if (defaultfontsize > 0) {
-		larg.f = defaultfontsize;
-		zoomabs(&larg);
-	}
+	zoomabs(&larg);
 }
 
 void
@@ -358,6 +360,15 @@ evrow(XEvent *e)
 	return y / win.ch;
 }
 
+void cyclefonts(const Arg *arg) {
+	currentfont++;
+	currentfont %= (sizeof fonts / sizeof fonts[0]);
+	usedfont = fonts[currentfont];
+	Arg larg;
+	larg.f = usedfontsize;
+	zoomabs(&larg);
+}
+
 void
 mousesel(XEvent *e, int done)
 {
@@ -493,7 +504,6 @@ bpress(XEvent *e)
 {
 	int btn = e->xbutton.button;
 	struct timespec now;
-	int snap;
 
 	if (1 <= btn && btn <= 11)
 		buttons |= 1 << (btn-1);
@@ -512,17 +522,34 @@ bpress(XEvent *e)
 		 * snapping behaviour is exposed.
 		 */
 		clock_gettime(CLOCK_MONOTONIC, &now);
-		if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) {
-			snap = SNAP_LINE;
-		} else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) {
-			snap = SNAP_WORD;
+		int const tripleClick = TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout,
+		doubleClick = TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout;
+		if ((mouseYank || mouseSelect) && (tripleClick || doubleClick)) {
+			if (!IS_SET(MODE_NORMAL)) normalMode();
+			historyOpToggle(1, 1);
+			tmoveto(evcol(e), evrow(e));
+			if (tripleClick) {
+				if (mouseYank) pressKeys("dVy", 3);
+				if (mouseSelect) pressKeys("dV", 2);
+			} else if (doubleClick) {
+				if (mouseYank) pressKeys("dyiW", 4);
+				if (mouseSelect) {
+					tmoveto(evcol(e), evrow(e));
+					pressKeys("viW", 3);
+				}
+			}
+			historyOpToggle(-1, 1);
 		} else {
-			snap = 0;
+			if (!IS_SET(MODE_NORMAL)) selstart(evcol(e), evrow(e), 0);
+			else {
+				historyOpToggle(1, 1);
+				tmoveto(evcol(e), evrow(e));
+				pressKeys("v", 1);
+				historyOpToggle(-1, 1);
+			}
 		}
 		xsel.tclick2 = xsel.tclick1;
 		xsel.tclick1 = now;
-
-		selstart(evcol(e), evrow(e), snap);
 	}
 }
 
@@ -732,8 +759,7 @@ brelease(XEvent *e)
 
 	if (mouseaction(e, 1))
 		return;
-	if (btn == Button1)
-		mousesel(e, 1);
+	if (btn == Button1 && !IS_SET(MODE_NORMAL)) mousesel(e, 1);
 }
 
 void
@@ -813,6 +839,8 @@ xloadcolor(int i, const char *name, Color *ncolor)
 	return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
 }
 
+void normalMode() { historyModeToggle((win.mode ^=MODE_NORMAL) & MODE_NORMAL); }
+
 void
 xloadcols(void)
 {
@@ -1167,7 +1195,7 @@ xinit(int cols, int rows)
 	if (!FcInit())
 		die("could not init fontconfig.\n");
 
-	usedfont = (opt_font == NULL)? font : opt_font;
+	usedfont = (opt_font == NULL) ? fonts[currentfont] : opt_font;
 	xloadfonts(usedfont, 0);
 
 	/* colors */
@@ -1283,8 +1311,10 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
 
 	for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
 		/* Fetch rune and mode for current glyph. */
-		rune = glyphs[i].u;
-		mode = glyphs[i].mode;
+		Glyph g = glyphs[i];
+		historyOverlay(x+i, y, &g);
+		rune = g.u;
+		mode = g.mode;
 
 		/* Skip dummy wide-character spacing. */
 		if (mode == ATTR_WDUMMY)
@@ -1655,10 +1685,30 @@ xseticontitle(char *p)
 }
 
 void
-xsettitle(char *p)
+xfreetitlestack(void)
+{
+	for (int i = 0; i < LEN(titlestack); i++) {
+		free(titlestack[i]);
+		titlestack[i] = NULL;
+	}
+}
+
+void
+xsettitle(char *p, int pop)
 {
 	XTextProperty prop;
-	DEFAULT(p, opt_title);
+
+	free(titlestack[tstki]);
+	if (pop) {
+		titlestack[tstki] = NULL;
+		tstki = (tstki - 1 + TITLESTACKSIZE) % TITLESTACKSIZE;
+		p = titlestack[tstki] ? titlestack[tstki] : opt_title;
+	} else if (p) {
+		titlestack[tstki] = xstrdup(p);
+	} else {
+		titlestack[tstki] = NULL;
+		p = opt_title;
+	}
 
 	if (p[0] == '\0')
 		p = opt_title;
@@ -1671,6 +1721,16 @@ xsettitle(char *p)
 	XFree(prop.value);
 }
 
+void
+xpushtitle(void)
+{
+	int tstkin = (tstki + 1) % TITLESTACKSIZE;
+
+	free(titlestack[tstkin]);
+	titlestack[tstkin] = titlestack[tstki] ? xstrdup(titlestack[tstki]) : NULL;
+	tstki = tstkin;
+}
+
 int
 xstartdraw(void)
 {
@@ -1688,6 +1748,7 @@ xdrawline(Line line, int x1, int y1, int x2)
 	i = ox = 0;
 	for (x = x1; x < x2 && i < numspecs; x++) {
 		new = line[x];
+		historyOverlay(x, y1, &new);
 		if (new.mode == ATTR_WDUMMY)
 			continue;
 		if (selected(x, y1))
@@ -1882,6 +1943,11 @@ kpress(XEvent *ev)
 	} else {
 		len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 	}
+	if (IS_SET(MODE_NORMAL)) {
+		if (kPressHist(buf, len, match(ControlMask, e->state), &ksym)
+		                                      == finish) normalMode();
+		return;
+	}
 
         /* 0. highlight URLs when control held */
 	if (ksym == XK_Control_L) {
@@ -2134,7 +2200,7 @@ xrdb_load(void)
 		  defaultrcs = defaultbg;
 		}
 
-		XRESOURCE_LOAD_STRING("font", font);
+		XRESOURCE_LOAD_STRING("font", fonts[0]);
 		XRESOURCE_LOAD_STRING("termname", termname);
 
 		XRESOURCE_LOAD_INTEGER("blinktimeout", blinktimeout);
@@ -2157,7 +2223,7 @@ reload(int sig)
 	/* colors, fonts */
 	xloadcols();
 	xunloadfonts();
-	xloadfonts(font, 0);
+	xloadfonts(fonts[currentfont], 0);
 
 	/* pretend the window just got resized */
 	cresize(win.w, win.h);