commit 8c43b34929936e11949728dfc8328c5cc2d0c1ae
parent b01bc68e43b7e6e4e20700ddcdee55b41652f58d
Author: Julius Huelsmann <juliusHuelsmann@gmail.com>
Date: Mon, 26 Apr 2021 14:28:22 +0200
[st][patch][vim_browse] upload new version
The new version of the patch contain:
- fixes,
- mouse click selection features.
Diffstat:
3 files changed, 2248 insertions(+), 11 deletions(-)
diff --git a/st.suckless.org/patches/vim_browse/index.md b/st.suckless.org/patches/vim_browse/index.md
@@ -51,22 +51,18 @@ Download
--------
If you want to try out the current version of the patch before patching your own build, check out [this repository](https://github.com/juliusHuelsmann/st), which contains a merged version of this patch with a reasonable configuration.
-**Version 1**
-The previous version of this patch is based on the pre-applied [Scrollback patch](https://st.suckless.org/patches/scrollback/).
-- *Based on `295a43f`*: [st-vimBrowse-20200604-295a43f.diff](st-vimBrowse-20200604-295a43f.diff)
-
-**Version 2**
Based on a [custom history patch](https://github.com/juliusHuelsmann/st-history-vim), which is already applied in the patches below with full set of `history` features. A more minimal version of the vim patch can be generated from the [st-history repository](https://github.com/juliusHuelsmann/st-history-vim).
+- *Based on `st-0.8.4`*:
+- [Version 2.2 (latest)](https://github.com/juliusHuelsmann/st/releases/download/vim2_2/st-meta-vim-full-20210425-43a395a-8.4.patch)
+- [Version 2](st-vim-0.8.4.patch)
- *Based on `st-0.8.3`*:
-- [st-vimBrowse-20200607-0.8.3.diff](st-vimBrowse-20200607-0.8.3.diff)
-- [st-vimBrowse-latestRelease-0.8.3.diff](https://github.com/juliusHuelsmann/st/releases/download/vim2_1/st-meta-vim-full-20200607-43a395a.diff)
-- *Based on `9ba7ecf`*:
-- [st-vimBrowse-20200607-9ba7ecf.diff](st-vimBrowse-20200607-9ba7ecf.diff)
-- [st-vimBrowse-latestRelease-9ba7ecf.diff](https://github.com/juliusHuelsmann/st/releases/download/vim2_1/st-meta-vim-full-20200607-9ba7ecf.diff)
+- [Version 2.2 (latest)](https://github.com/juliusHuelsmann/st/releases/download/vim2_2/st-meta-vim-full-20210425-43a395a.diff)
+- [Version 2](st-vim-0.8.3.patch)
Authors of the Vim-Browse Patch
--------------------------------
-* Julius Hülsmann - <juliusHuelsmann [at] gmail [dot] com>
+* [Julius Hülsmann](https://github.com/juliusHuelsmann) - <juliusHuelsmann [at] gmail [dot] com>
* [Kevin Velghe](https://github.com/paretje): Fix: Underline highlight
* [dadaurs](mailto:david.wiedemann@outlook.com): Port Version 1 to `st-295a43f`
+* [smartding](https://github.com/smartding): detect and fix clipboard bug
diff --git a/st.suckless.org/patches/vim_browse/st-vim-0.8.3.patch b/st.suckless.org/patches/vim_browse/st-vim-0.8.3.patch
@@ -0,0 +1,1132 @@
+From 65989bfc0ee4566318ae0a123ee3c40a686c20ad Mon Sep 17 00:00:00 2001
+From: Julius Huelsmann <juliusHuelsmann@gmail.com>
+Date: Sun, 25 Apr 2021 23:06:37 +0200
+Subject: [PATCH] meta-patch: repaint
+
+---
+ Makefile | 2 +-
+ config.def.h | 16 +++
+ normalMode.c | 284 +++++++++++++++++++++++++++++++++++++++++
+ normalMode.h | 8 ++
+ st.c | 349 +++++++++++++++++++++++++++------------------------
+ st.h | 2 +
+ utils.h | 23 ++++
+ win.h | 1 +
+ x.c | 51 ++++++--
+ 9 files changed, 558 insertions(+), 178 deletions(-)
+ create mode 100644 normalMode.c
+ create mode 100644 normalMode.h
+ create mode 100644 utils.h
+
+diff --git a/Makefile b/Makefile
+index 470ac86..6688a58 100644
+--- a/Makefile
++++ b/Makefile
+@@ -21,7 +21,7 @@ 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
+
+ $(OBJ): config.h config.mk
+diff --git a/config.def.h b/config.def.h
+index 0895a1f..b33cef9 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -122,6 +122,21 @@ unsigned int defaultfg = 7;
+ unsigned int defaultbg = 0;
+ static unsigned int defaultcs = 256;
+ static unsigned int defaultrcs = 257;
++unsigned int const currentBg = 6, buffSize = 2048;
++/// Enable double / triple click yanking / selection of word / line.
++int const mouseYank = 1, mouseSelect = 0;
++/// [Vim Browse] Colors for search results currently on screen.
++unsigned int const highlightBg = 160, highlightFg = 15;
++char const wDelS[] = "!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", wDelL[] = " \t";
++char *nmKeys [] = { ///< Shortcusts executed in normal mode
++ "R/Building\nN", "r/Building\n", "X/juli@machine\nN", "x/juli@machine\n",
++ "Q?[Leaving vim, starting execution]\n","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
+@@ -188,6 +203,7 @@ static Shortcut shortcuts[] = {
+ { TERMMOD, XK_Y, selpaste, {.i = 0} },
+ { ShiftMask, XK_Insert, selpaste, {.i = 0} },
+ { TERMMOD, XK_Num_Lock, numlock, {.i = 0} },
++ { MODKEY, XK_c, normalMode, {.i = 0} },
+ };
+
+ /*
+diff --git a/normalMode.c b/normalMode.c
+new file mode 100644
+index 0000000..f0c7e30
+--- /dev/null
++++ b/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, 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;
++ 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);
++}
+diff --git a/normalMode.h b/normalMode.h
+new file mode 100644
+index 0000000..eb77484
+--- /dev/null
++++ b/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);
+diff --git a/st.c b/st.c
+index 0ce6ac2..4e9005f 100644
+--- a/st.c
++++ b/st.c
+@@ -1,4 +1,5 @@
+ /* See LICENSE for license details. */
++#include <assert.h>
+ #include <ctype.h>
+ #include <errno.h>
+ #include <fcntl.h>
+@@ -42,6 +43,8 @@
+ #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
+ #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
+ #define ISDELIM(u) (u && wcschr(worddelimiters, u))
++static inline int max(int a, int b) { return a > b ? a : b; }
++static inline int min(int a, int b) { return a < b ? a : b; }
+
+ enum term_mode {
+ MODE_WRAP = 1 << 0,
+@@ -97,6 +100,7 @@ typedef struct {
+ int mode;
+ int type;
+ int snap;
++ int swap;
+ /*
+ * Selection variables:
+ * nb – normalized coordinates of the beginning of the selection
+@@ -179,7 +183,6 @@ static void tdeleteline(int);
+ static void tinsertblank(int);
+ static void tinsertblankline(int);
+ static int tlinelen(int);
+-static void tmoveto(int, int);
+ static void tmoveato(int, int);
+ static void tnewline(int);
+ static void tputtab(int);
+@@ -206,7 +209,6 @@ static void drawregion(int, int, int, int);
+
+ static void selnormalize(void);
+ static void selscroll(int, int);
+-static void selsnap(int *, int *, int);
+
+ static size_t utf8decode(const char *, Rune *, size_t);
+ static Rune utf8decodebyte(char, size_t *);
+@@ -232,6 +234,14 @@ static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+ static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
+ static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
++int buffCols;
++extern int const buffSize;
++int histOp, histMode, histOff, insertOff, altToggle, *mark;
++Line *buf = NULL;
++static TCursor c[3];
++static inline int rows() { return IS_SET(MODE_ALTSCREEN) ? term.row : buffSize;}
++static inline int rangeY(int i) { while (i < 0) i += rows(); return i % rows();}
++
+ ssize_t
+ xwrite(int fd, const char *s, size_t len)
+ {
+@@ -424,6 +434,118 @@ tlinelen(int y)
+ return i;
+ }
+
++void historyOpToggle(int start, int paint) {
++ if ((!histOp == !(histOp + start)) && ((histOp += start) || 1)) return;
++ if (histMode && paint && (!IS_SET(MODE_ALTSCREEN) || altToggle)) draw();
++ tcursor(CURSOR_SAVE);
++ histOp += start;
++ if (histMode && altToggle) {
++ tswapscreen();
++ memset(term.dirty,0,sizeof(*term.dirty)*term.row);
++ }
++ tcursor(CURSOR_LOAD);
++ *(!IS_SET(MODE_ALTSCREEN)?&term.line:&term.alt)=&buf[histOp?histOff:insertOff];
++}
++
++void historyModeToggle(int start) {
++ if (!(histMode = (histOp = !!start))) {
++ selnormalize();
++ tfulldirt();
++ } else {
++ tcursor(CURSOR_SAVE);
++ histOp = 0;
++ histOff = insertOff;
++ }
++}
++
++int historyBufferScroll(int n) {
++ if (IS_SET(MODE_ALTSCREEN) || !n) return histOp;
++ int p=abs(n=(n<0) ? max(n,-term.row) : min(n,term.row)), r=term.row-p,
++ s=sizeof(*term.dirty), *ptr=histOp?&histOff:&insertOff;
++ if (!histMode || histOp) tfulldirt(); else {
++ memmove(&term.dirty[-min(n,0)], &term.dirty[max(n,0)], s*r);
++ memset(&term.dirty[n>0 ? r : 0], 0, s * p);
++ }
++ term.line = &buf[*ptr = (buffSize+*ptr+n) % buffSize];
++ // Cut part of selection removed from buffer, and update sel.ne/b.
++ int const prevOffBuf = sel.alt ? 0 : insertOff + term.row;
++ if (sel.ob.x != -1 && !histOp && n) {
++ int const offBuf = sel.alt ? 0 : insertOff + term.row,
++ pb = rangeY(sel.ob.y - prevOffBuf),
++ pe = rangeY(sel.oe.y - prevOffBuf);
++ int const b = rangeY(sel.ob.y - offBuf), nln = n < 0,
++ e = rangeY(sel.oe.y - offBuf), last = offBuf - nln;
++ if (pb != b && ((pb < b) != nln)) sel.ob.y = last;
++ if (pe != e && ((pe < e) != nln)) sel.oe.y = last;
++ if (sel.oe.y == last && sel.ob.y == last) selclear();
++ }
++ selnormalize();
++ // Clear the new region exposed by the shift.
++ if (!histOp) tclearregion(0, n>0?r+1:0, buffCols-1, n>0?term.row:p-1);
++ return 1;
++}
++
++int historyMove(int x, int y, int ly) {
++ historyOpToggle(1, 1);
++ y += ((term.c.x += x) < 0 ?term.c.x-term.col :term.c.x) / term.col;//< x
++ if ((term.c.x %= term.col) < 0) term.c.x += term.col;
++ if ((term.c.y += y) >= term.row) ly += term.c.y - term.row + 1; //< y
++ else if (term.c.y < 0) ly += term.c.y;
++ term.c.y = MIN(MAX(term.c.y, 0), term.row - 1);
++ // Check if scroll is necessary / arrived at top / bottom of terminal history
++ int t = 0, b = 0, finTop = ly < 0, finBot = ly > 0;
++ if (!IS_SET(MODE_ALTSCREEN)) {
++ b=rangeY(insertOff-histOff), t=-rangeY(-term.row-(insertOff-histOff));
++ finBot = ly > b, finTop=histMode&&((-ly>-t));
++ }
++ if ((finTop || finBot) && (x||y)) term.c.x = finBot ? term.col-1 : 0;
++ historyBufferScroll(finBot ? b : (finTop ? t : ly));
++ historyOpToggle(-1, 1);
++ return finTop || finBot;
++}
++
++#include "normalMode.c"
++
++void selnormalize(void) {
++ historyOpToggle(1, 1);
++
++ int const oldb = sel.nb.y, olde = sel.ne.y;
++ if (sel.ob.x == -1) {
++ sel.ne.y = sel.nb.y = -1;
++ } else {
++ int const offsetBuffer = sel.alt ? 0 : insertOff + term.row;
++ int const off = sel.alt ? 0 : (histMode ? histOff : insertOff);
++ int const nby = rangeY(sel.ob.y - off),
++ ney = rangeY(sel.oe.y - off);
++ sel.swap = rangeY(sel.ob.y - offsetBuffer)
++ > rangeY(sel.oe.y - offsetBuffer);
++ sel.nb.y = sel.swap ? ney : nby;
++ sel.ne.y = !sel.swap ? ney : nby;
++ int const cnb = sel.nb.y < term.row, cne = sel.ne.y < term.row;
++ if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
++ if (cnb) sel.nb.x = (!sel.swap) ? sel.ob.x : sel.oe.x;
++ if (cne) sel.ne.x = (!sel.swap) ? sel.oe.x : sel.ob.x;
++ } else {
++ if (cnb) sel.nb.x = MIN(sel.ob.x, sel.oe.x);
++ if (cne) sel.ne.x = MAX(sel.ob.x, sel.oe.x);
++ }
++ }
++ int const nBet=sel.nb.y<=sel.ne.y, oBet=oldb<=olde;
++ for (int i = 0; i < term.row; ++i) {
++ int const n = nBet ? BETWEEN(i, sel.nb.y, sel.ne.y)
++ : OUT(i, sel.nb.y, sel.ne.y);
++ term.dirty[i] |= (sel.type == SEL_RECTANGULAR && n) ||
++ (n != (oBet ? BETWEEN(i,oldb,olde) : OUT(i,oldb,olde)));
++
++ }
++ if (BETWEEN(oldb, 0, term.row - 1)) term.dirty[oldb] = 1;
++ if (BETWEEN(olde, 0, term.row - 1)) term.dirty[olde] = 1;
++ if (BETWEEN(sel.nb.y, 0, term.row - 1)) term.dirty[sel.nb.y] = 1;
++ if (BETWEEN(sel.ne.y, 0, term.row - 1)) term.dirty[sel.ne.y] = 1;
++
++ historyOpToggle(-1, 1);
++}
++
+ void
+ selstart(int col, int row, int snap)
+ {
+@@ -433,19 +555,14 @@ selstart(int col, int row, int snap)
+ sel.alt = IS_SET(MODE_ALTSCREEN);
+ sel.snap = snap;
+ sel.oe.x = sel.ob.x = col;
+- sel.oe.y = sel.ob.y = row;
++ sel.oe.y = sel.ob.y = row + !sel.alt * (histMode ? histOff : insertOff);
++ if (sel.snap != 0) sel.mode = SEL_READY;
+ selnormalize();
+-
+- if (sel.snap != 0)
+- sel.mode = SEL_READY;
+- tsetdirt(sel.nb.y, sel.ne.y);
+ }
+
+ void
+ selextend(int col, int row, int type, int done)
+ {
+- int oldey, oldex, oldsby, oldsey, oldtype;
+-
+ if (sel.mode == SEL_IDLE)
+ return;
+ if (done && sel.mode == SEL_EMPTY) {
+@@ -453,51 +570,13 @@ selextend(int col, int row, int type, int done)
+ return;
+ }
+
+- oldey = sel.oe.y;
+- oldex = sel.oe.x;
+- oldsby = sel.nb.y;
+- oldsey = sel.ne.y;
+- oldtype = sel.type;
+-
+ sel.oe.x = col;
+- sel.oe.y = row;
++ sel.oe.y = row + (sel.alt ? 0 : (histMode ? histOff : insertOff));
+ selnormalize();
+ sel.type = type;
+-
+- 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;
+ }
+
+-void
+-selnormalize(void)
+-{
+- int i;
+-
+- if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
+- sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
+- sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
+- } else {
+- sel.nb.x = MIN(sel.ob.x, sel.oe.x);
+- sel.ne.x = MAX(sel.ob.x, sel.oe.x);
+- }
+- sel.nb.y = MIN(sel.ob.y, sel.oe.y);
+- sel.ne.y = MAX(sel.ob.y, sel.oe.y);
+-
+- selsnap(&sel.nb.x, &sel.nb.y, -1);
+- selsnap(&sel.ne.x, &sel.ne.y, +1);
+-
+- /* expand selection over line breaks */
+- if (sel.type == SEL_RECTANGULAR)
+- return;
+- i = tlinelen(sel.nb.y);
+- if (i < sel.nb.x)
+- sel.nb.x = i;
+- if (tlinelen(sel.ne.y) <= sel.ne.x)
+- sel.ne.x = term.col - 1;
+-}
+-
+ int
+ selected(int x, int y)
+ {
+@@ -509,119 +588,47 @@ selected(int x, int y)
+ return BETWEEN(y, sel.nb.y, sel.ne.y)
+ && BETWEEN(x, sel.nb.x, sel.ne.x);
+
+- 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);
+-}
+-
+-void
+-selsnap(int *x, int *y, int direction)
+-{
+- int newx, newy, xt, yt;
+- int delim, prevdelim;
+- Glyph *gp, *prevgp;
+-
+- switch (sel.snap) {
+- case SNAP_WORD:
+- /*
+- * Snap around if the word wraps around at the end or
+- * beginning of a line.
+- */
+- prevgp = &term.line[*y][*x];
+- prevdelim = ISDELIM(prevgp->u);
+- for (;;) {
+- newx = *x + direction;
+- newy = *y;
+- if (!BETWEEN(newx, 0, term.col - 1)) {
+- newy += direction;
+- newx = (newx + term.col) % term.col;
+- if (!BETWEEN(newy, 0, term.row - 1))
+- break;
+-
+- if (direction > 0)
+- yt = *y, xt = *x;
+- else
+- yt = newy, xt = newx;
+- if (!(term.line[yt][xt].mode & ATTR_WRAP))
+- break;
+- }
+-
+- if (newx >= tlinelen(newy))
+- break;
+-
+- gp = &term.line[newy][newx];
+- delim = ISDELIM(gp->u);
+- if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+- || (delim && gp->u != prevgp->u)))
+- break;
+-
+- *x = newx;
+- *y = newy;
+- prevgp = gp;
+- prevdelim = delim;
+- }
+- break;
+- case SNAP_LINE:
+- /*
+- * Snap around if the the previous line or the current one
+- * has set ATTR_WRAP at its end. Then the whole next or
+- * previous line will be selected.
+- */
+- *x = (direction < 0) ? 0 : term.col - 1;
+- if (direction < 0) {
+- for (; *y > 0; *y += direction) {
+- if (!(term.line[*y-1][term.col-1].mode
+- & ATTR_WRAP)) {
+- break;
+- }
+- }
+- } else if (direction > 0) {
+- for (; *y < term.row-1; *y += direction) {
+- if (!(term.line[*y][term.col-1].mode
+- & ATTR_WRAP)) {
+- break;
+- }
+- }
+- }
+- break;
+- }
++ return ((sel.nb.y > sel.ne.y) ? OUT(y, sel.nb.y, sel.ne.y)
++ : BETWEEN(y, sel.nb.y, sel.ne.y)) &&
++ (y != sel.nb.y || x >= sel.nb.x) &&
++ (y != sel.ne.y || x <= sel.ne.x);
+ }
+
+ char *
+ getsel(void)
+ {
+ char *str, *ptr;
+- int y, bufsize, lastx, linelen;
++ int y, yy, bufsize, lastx;
+ Glyph *gp, *last;
+
+ if (sel.ob.x == -1)
+ return NULL;
+
+- bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
++ int const start = sel.swap ? sel.oe.y : sel.ob.y, h = rows();
++ int endy = (sel.swap ? sel.ob.y : sel.oe.y);
++ for (; endy < start; endy += h);
++ Line * const cbuf = IS_SET(MODE_ALTSCREEN) ? term.line : buf;
++ bufsize = (term.col+1) * (endy-start+1 ) * UTF_SIZ;
++ assert(bufsize > 0);
+ ptr = str = xmalloc(bufsize);
+
+ /* append every set & selected glyph to the selection */
+- for (y = sel.nb.y; y <= sel.ne.y; y++) {
+- if ((linelen = tlinelen(y)) == 0) {
+- *ptr++ = '\n';
+- continue;
+- }
++ for (y = start; y <= endy; y++) {
++ yy = y % h;
+
+ if (sel.type == SEL_RECTANGULAR) {
+- gp = &term.line[y][sel.nb.x];
++ gp = &cbuf[yy][sel.nb.x];
+ lastx = sel.ne.x;
+ } else {
+- gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+- lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
++ gp = &cbuf[yy][start == y ? sel.nb.x : 0];
++ lastx = (endy == y) ? sel.ne.x : term.col-1;
+ }
+- last = &term.line[y][MIN(lastx, linelen-1)];
+- while (last >= gp && last->u == ' ')
+- --last;
++ last = &cbuf[yy][lastx];
++ if (!(cbuf[yy][term.col - 1].mode & ATTR_WRAP))
++ while (last > gp && last->u == ' ') --last;
+
+ for ( ; gp <= last; ++gp) {
+- if (gp->mode & ATTR_WDUMMY)
+- continue;
+-
++ if (gp->mode & ATTR_WDUMMY) continue;
+ ptr += utf8encode(gp->u, ptr);
+ }
+
+@@ -634,7 +641,7 @@ getsel(void)
+ * st.
+ * FIXME: Fix the computer world.
+ */
+- if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
++ if ((y < endy || lastx == term.col - 1) && !(last->mode & ATTR_WRAP))
+ *ptr++ = '\n';
+ }
+ *ptr = 0;
+@@ -648,7 +655,7 @@ selclear(void)
+ return;
+ sel.mode = SEL_IDLE;
+ sel.ob.x = -1;
+- tsetdirt(sel.nb.y, sel.ne.y);
++ selnormalize();
+ }
+
+ void
+@@ -1001,8 +1008,7 @@ tfulldirt(void)
+ void
+ tcursor(int mode)
+ {
+- static TCursor c[2];
+- int alt = IS_SET(MODE_ALTSCREEN);
++ int alt = (histOp) ? 0 : (IS_SET(MODE_ALTSCREEN) + 1);
+
+ if (mode == CURSOR_SAVE) {
+ c[alt] = term.c;
+@@ -1062,6 +1068,7 @@ tswapscreen(void)
+ void
+ tscrolldown(int orig, int n)
+ {
++ if (!orig && historyBufferScroll(-n)) return;
+ int i;
+ Line temp;
+
+@@ -1082,6 +1089,7 @@ tscrolldown(int orig, int n)
+ void
+ tscrollup(int orig, int n)
+ {
++ if (!orig && historyBufferScroll(n)) return;
+ int i;
+ Line temp;
+
+@@ -1243,8 +1251,8 @@ tclearregion(int x1, int y1, int x2, int y2)
+ if (y1 > y2)
+ temp = y1, y1 = y2, y2 = temp;
+
+- LIMIT(x1, 0, term.col-1);
+- LIMIT(x2, 0, term.col-1);
++ LIMIT(x1, 0, buffCols-1);
++ LIMIT(x2, 0, buffCols-1);
+ LIMIT(y1, 0, term.row-1);
+ LIMIT(y2, 0, term.row-1);
+
+@@ -2413,8 +2421,6 @@ check_control_code:
+ */
+ return;
+ }
+- if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
+- selclear();
+
+ gp = &term.line[term.c.y][term.c.x];
+ if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
+@@ -2483,8 +2489,10 @@ void
+ tresize(int col, int row)
+ {
+ int i;
+- int minrow = MIN(row, term.row);
+- int mincol = MIN(col, term.col);
++ int const colSet = col, alt = IS_SET(MODE_ALTSCREEN), ini = buf == NULL;
++ col = MAX(col, buffCols);
++ row = MIN(row, buffSize);
++ int const minrow = MIN(row, term.row), mincol = MIN(col, buffCols);
+ int *bp;
+ TCursor c;
+
+@@ -2493,6 +2501,7 @@ tresize(int col, int row)
+ "tresize: error resizing to %dx%d\n", col, row);
+ return;
+ }
++ if (alt) tswapscreen();
+
+ /*
+ * slide screen to keep cursor where we expect it -
+@@ -2500,48 +2509,54 @@ tresize(int col, int row)
+ * memmove because we're freeing the earlier lines
+ */
+ for (i = 0; i <= term.c.y - row; i++) {
+- free(term.line[i]);
+ free(term.alt[i]);
+ }
+ /* 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));
+ }
+ 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));
++ buf = xrealloc(buf, (buffSize + row) * sizeof(Line));
+ term.alt = xrealloc(term.alt, row * sizeof(Line));
+ term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
++ mark = xrealloc(mark, col * row * sizeof(*mark));
+ term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+
+ /* 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));
+ }
+
+ /* allocate any new rows */
+ for (/* i = minrow */; i < row; i++) {
+- term.line[i] = xmalloc(col * sizeof(Glyph));
+ term.alt[i] = xmalloc(col * sizeof(Glyph));
+ }
+- if (col > term.col) {
+- bp = term.tabs + term.col;
++ if (col > buffCols) {
++ bp = term.tabs + buffCols;
+
+- memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
++ memset(bp, 0, sizeof(*term.tabs) * (col - buffCols));
+ while (--bp > term.tabs && !*bp)
+ /* nothing */ ;
+ for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+ *bp = 1;
+ }
++ Glyph g=(Glyph){.bg=term.c.attr.bg, .fg=term.c.attr.fg, .u=' ', .mode=0};
++ for (i = 0; i < buffSize; ++i) {
++ buf[i] = xrealloc(ini ? NULL : buf[i], col*sizeof(Glyph));
++ for (int j = ini ? 0 : buffCols; j < col; ++j) buf[i][j] = g;
++ }
++ for (i = 0; i < row; ++i) buf[buffSize + i] = buf[i];
++ term.line = &buf[*(histOp?&histOff:&insertOff) +=MAX(term.c.y-row+1,0)];
++ memset(mark, 0, col * row * sizeof(*mark));
+ /* update terminal size */
+- term.col = col;
++ term.col = colSet;
++ buffCols = col;
+ term.row = row;
++ if (alt) tswapscreen();
+ /* reset scrolling region */
+ tsetscroll(0, row-1);
+ /* make use of the LIMIT in tmoveto */
+@@ -2570,15 +2585,17 @@ resettitle(void)
+ void
+ drawregion(int x1, int y1, int x2, int y2)
+ {
++ if (altToggle && histMode && !histOp)
++ memset(term.dirty, 0, sizeof(*term.dirty) * term.row);
++ int const o = !IS_SET(MODE_ALTSCREEN) && histMode && !histOp, h =rows();
+ int y;
+
+ for (y = y1; y < y2; y++) {
+- if (!term.dirty[y])
+- continue;
+-
+- term.dirty[y] = 0;
+- xdrawline(term.line[y], x1, y, x2);
++ int const oy = o ? (y + insertOff - histOff + h) % h : y;
++ if (!BETWEEN(oy, 0, term.row-1) || !term.dirty[y]) continue;
++ xdrawline(term.line[y], x1, oy, x2);
+ }
++ memset(&term.dirty[y1], 0, sizeof(*term.dirty) * (y2 - y1));
+ }
+
+ void
+@@ -2597,7 +2614,9 @@ draw(void)
+ if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
+ cx--;
+
++ if (histMode) historyPreDraw();
+ drawregion(0, 0, term.col, term.row);
++ if (!histMode)
+ xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+ term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+ term.ocx = cx;
+diff --git a/st.h b/st.h
+index d978458..d7c2d07 100644
+--- a/st.h
++++ b/st.h
+@@ -8,6 +8,7 @@
+ #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)
+@@ -89,6 +90,7 @@ 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(char *, char *, char *, char **);
+diff --git a/utils.h b/utils.h
+new file mode 100644
+index 0000000..ca435e6
+--- /dev/null
++++ b/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));
++}
+diff --git a/win.h b/win.h
+index a6ef1b9..cea19f3 100644
+--- a/win.h
++++ b/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,
+ };
+diff --git a/x.c b/x.c
+index e5f1737..f0024ab 100644
+--- a/x.c
++++ b/x.c
+@@ -19,6 +19,7 @@ char *argv0;
+ #include "arg.h"
+ #include "st.h"
+ #include "win.h"
++#include "normalMode.h"
+
+ /* types used in config.h */
+ typedef struct {
+@@ -261,6 +262,7 @@ clipcopy(const Arg *dummy)
+
+ free(xsel.clipboard);
+ xsel.clipboard = NULL;
++ xsetsel(getsel());
+
+ if (xsel.primary != NULL) {
+ xsel.clipboard = xstrdup(xsel.primary);
+@@ -460,7 +462,6 @@ void
+ bpress(XEvent *e)
+ {
+ struct timespec now;
+- int snap;
+
+ if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
+ mousereport(e);
+@@ -476,17 +477,34 @@ 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);
+ }
+ }
+
+@@ -691,8 +709,7 @@ brelease(XEvent *e)
+
+ if (mouseaction(e, 1))
+ return;
+- if (e->xbutton.button == Button1)
+- mousesel(e, 1);
++ if (e->xbutton.button == Button1 && !IS_SET(MODE_NORMAL)) mousesel(e, 1);
+ }
+
+ void
+@@ -772,6 +789,8 @@ 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)
+ {
+@@ -1225,8 +1244,10 @@ 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)
+@@ -1608,6 +1629,7 @@ 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))
+@@ -1800,6 +1822,11 @@ kpress(XEvent *ev)
+ len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
+ 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;
++ }
+ /* 1. shortcuts */
+ for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
+ if (ksym == bp->keysym && match(bp->mod, e->state)) {
+--
+2.25.1
+
diff --git a/st.suckless.org/patches/vim_browse/st-vim-0.8.4.patch b/st.suckless.org/patches/vim_browse/st-vim-0.8.4.patch
@@ -0,0 +1,1109 @@
+diff --git a/Makefile b/Makefile
+index 470ac86..6688a58 100644
+--- a/Makefile
++++ b/Makefile
+@@ -21,7 +21,7 @@ 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
+
+ $(OBJ): config.h config.mk
+diff --git a/config.def.h b/config.def.h
+index 6f05dce..16cb5e1 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -131,6 +131,21 @@ unsigned int defaultfg = 7;
+ unsigned int defaultbg = 0;
+ static unsigned int defaultcs = 256;
+ static unsigned int defaultrcs = 257;
++unsigned int const currentBg = 6, buffSize = 2048;
++/// Enable double / triple click yanking / selection of word / line.
++int const mouseYank = 1, mouseSelect = 0;
++/// [Vim Browse] Colors for search results currently on screen.
++unsigned int const highlightBg = 160, highlightFg = 15;
++char const wDelS[] = "!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", wDelL[] = " \t";
++char *nmKeys [] = { ///< Shortcusts executed in normal mode
++ "R/Building\nN", "r/Building\n", "X/juli@machine\nN", "x/juli@machine\n",
++ "Q?[Leaving vim, starting execution]\n","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
+@@ -199,6 +214,7 @@ static Shortcut shortcuts[] = {
+ { TERMMOD, XK_Y, selpaste, {.i = 0} },
+ { ShiftMask, XK_Insert, selpaste, {.i = 0} },
+ { TERMMOD, XK_Num_Lock, numlock, {.i = 0} },
++ { MODKEY, XK_c, normalMode, {.i = 0} },
+ };
+
+ /*
+diff --git a/normalMode.c b/normalMode.c
+new file mode 100644
+index 0000000..f0c7e30
+--- /dev/null
++++ b/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, 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;
++ 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);
++}
+diff --git a/normalMode.h b/normalMode.h
+new file mode 100644
+index 0000000..eb77484
+--- /dev/null
++++ b/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);
+diff --git a/st.c b/st.c
+index 76b7e0d..363f09c 100644
+--- a/st.c
++++ b/st.c
+@@ -1,4 +1,5 @@
+ /* See LICENSE for license details. */
++#include <assert.h>
+ #include <ctype.h>
+ #include <errno.h>
+ #include <fcntl.h>
+@@ -42,6 +43,8 @@
+ #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
+ #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
+ #define ISDELIM(u) (u && wcschr(worddelimiters, u))
++static inline int max(int a, int b) { return a > b ? a : b; }
++static inline int min(int a, int b) { return a < b ? a : b; }
+
+ enum term_mode {
+ MODE_WRAP = 1 << 0,
+@@ -95,6 +98,7 @@ typedef struct {
+ int mode;
+ int type;
+ int snap;
++ int swap;
+ /*
+ * Selection variables:
+ * nb – normalized coordinates of the beginning of the selection
+@@ -178,7 +182,6 @@ static void tdeleteline(int);
+ static void tinsertblank(int);
+ static void tinsertblankline(int);
+ static int tlinelen(int);
+-static void tmoveto(int, int);
+ static void tmoveato(int, int);
+ static void tnewline(int);
+ static void tputtab(int);
+@@ -205,7 +208,6 @@ static void drawregion(int, int, int, int);
+
+ static void selnormalize(void);
+ static void selscroll(int, int);
+-static void selsnap(int *, int *, int);
+
+ static size_t utf8decode(const char *, Rune *, size_t);
+ static Rune utf8decodebyte(char, size_t *);
+@@ -231,6 +233,14 @@ static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+ static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
+ static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
++int buffCols;
++extern int const buffSize;
++int histOp, histMode, histOff, insertOff, altToggle, *mark;
++Line *buf = NULL;
++static TCursor c[3];
++static inline int rows() { return IS_SET(MODE_ALTSCREEN) ? term.row : buffSize;}
++static inline int rangeY(int i) { while (i < 0) i += rows(); return i % rows();}
++
+ ssize_t
+ xwrite(int fd, const char *s, size_t len)
+ {
+@@ -423,6 +433,118 @@ tlinelen(int y)
+ return i;
+ }
+
++void historyOpToggle(int start, int paint) {
++ if ((!histOp == !(histOp + start)) && ((histOp += start) || 1)) return;
++ if (histMode && paint && (!IS_SET(MODE_ALTSCREEN) || altToggle)) draw();
++ tcursor(CURSOR_SAVE);
++ histOp += start;
++ if (histMode && altToggle) {
++ tswapscreen();
++ memset(term.dirty,0,sizeof(*term.dirty)*term.row);
++ }
++ tcursor(CURSOR_LOAD);
++ *(!IS_SET(MODE_ALTSCREEN)?&term.line:&term.alt)=&buf[histOp?histOff:insertOff];
++}
++
++void historyModeToggle(int start) {
++ if (!(histMode = (histOp = !!start))) {
++ selnormalize();
++ tfulldirt();
++ } else {
++ tcursor(CURSOR_SAVE);
++ histOp = 0;
++ histOff = insertOff;
++ }
++}
++
++int historyBufferScroll(int n) {
++ if (IS_SET(MODE_ALTSCREEN) || !n) return histOp;
++ int p=abs(n=(n<0) ? max(n,-term.row) : min(n,term.row)), r=term.row-p,
++ s=sizeof(*term.dirty), *ptr=histOp?&histOff:&insertOff;
++ if (!histMode || histOp) tfulldirt(); else {
++ memmove(&term.dirty[-min(n,0)], &term.dirty[max(n,0)], s*r);
++ memset(&term.dirty[n>0 ? r : 0], 0, s * p);
++ }
++ term.line = &buf[*ptr = (buffSize+*ptr+n) % buffSize];
++ // Cut part of selection removed from buffer, and update sel.ne/b.
++ int const prevOffBuf = sel.alt ? 0 : insertOff + term.row;
++ if (sel.ob.x != -1 && !histOp && n) {
++ int const offBuf = sel.alt ? 0 : insertOff + term.row,
++ pb = rangeY(sel.ob.y - prevOffBuf),
++ pe = rangeY(sel.oe.y - prevOffBuf);
++ int const b = rangeY(sel.ob.y - offBuf), nln = n < 0,
++ e = rangeY(sel.oe.y - offBuf), last = offBuf - nln;
++ if (pb != b && ((pb < b) != nln)) sel.ob.y = last;
++ if (pe != e && ((pe < e) != nln)) sel.oe.y = last;
++ if (sel.oe.y == last && sel.ob.y == last) selclear();
++ }
++ selnormalize();
++ // Clear the new region exposed by the shift.
++ if (!histOp) tclearregion(0, n>0?r+1:0, buffCols-1, n>0?term.row:p-1);
++ return 1;
++}
++
++int historyMove(int x, int y, int ly) {
++ historyOpToggle(1, 1);
++ y += ((term.c.x += x) < 0 ?term.c.x-term.col :term.c.x) / term.col;//< x
++ if ((term.c.x %= term.col) < 0) term.c.x += term.col;
++ if ((term.c.y += y) >= term.row) ly += term.c.y - term.row + 1; //< y
++ else if (term.c.y < 0) ly += term.c.y;
++ term.c.y = MIN(MAX(term.c.y, 0), term.row - 1);
++ // Check if scroll is necessary / arrived at top / bottom of terminal history
++ int t = 0, b = 0, finTop = ly < 0, finBot = ly > 0;
++ if (!IS_SET(MODE_ALTSCREEN)) {
++ b=rangeY(insertOff-histOff), t=-rangeY(-term.row-(insertOff-histOff));
++ finBot = ly > b, finTop=histMode&&((-ly>-t));
++ }
++ if ((finTop || finBot) && (x||y)) term.c.x = finBot ? term.col-1 : 0;
++ historyBufferScroll(finBot ? b : (finTop ? t : ly));
++ historyOpToggle(-1, 1);
++ return finTop || finBot;
++}
++
++#include "normalMode.c"
++
++void selnormalize(void) {
++ historyOpToggle(1, 1);
++
++ int const oldb = sel.nb.y, olde = sel.ne.y;
++ if (sel.ob.x == -1) {
++ sel.ne.y = sel.nb.y = -1;
++ } else {
++ int const offsetBuffer = sel.alt ? 0 : insertOff + term.row;
++ int const off = sel.alt ? 0 : (histMode ? histOff : insertOff);
++ int const nby = rangeY(sel.ob.y - off),
++ ney = rangeY(sel.oe.y - off);
++ sel.swap = rangeY(sel.ob.y - offsetBuffer)
++ > rangeY(sel.oe.y - offsetBuffer);
++ sel.nb.y = sel.swap ? ney : nby;
++ sel.ne.y = !sel.swap ? ney : nby;
++ int const cnb = sel.nb.y < term.row, cne = sel.ne.y < term.row;
++ if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
++ if (cnb) sel.nb.x = (!sel.swap) ? sel.ob.x : sel.oe.x;
++ if (cne) sel.ne.x = (!sel.swap) ? sel.oe.x : sel.ob.x;
++ } else {
++ if (cnb) sel.nb.x = MIN(sel.ob.x, sel.oe.x);
++ if (cne) sel.ne.x = MAX(sel.ob.x, sel.oe.x);
++ }
++ }
++ int const nBet=sel.nb.y<=sel.ne.y, oBet=oldb<=olde;
++ for (int i = 0; i < term.row; ++i) {
++ int const n = nBet ? BETWEEN(i, sel.nb.y, sel.ne.y)
++ : OUT(i, sel.nb.y, sel.ne.y);
++ term.dirty[i] |= (sel.type == SEL_RECTANGULAR && n) ||
++ (n != (oBet ? BETWEEN(i,oldb,olde) : OUT(i,oldb,olde)));
++
++ }
++ if (BETWEEN(oldb, 0, term.row - 1)) term.dirty[oldb] = 1;
++ if (BETWEEN(olde, 0, term.row - 1)) term.dirty[olde] = 1;
++ if (BETWEEN(sel.nb.y, 0, term.row - 1)) term.dirty[sel.nb.y] = 1;
++ if (BETWEEN(sel.ne.y, 0, term.row - 1)) term.dirty[sel.ne.y] = 1;
++
++ historyOpToggle(-1, 1);
++}
++
+ void
+ selstart(int col, int row, int snap)
+ {
+@@ -432,19 +554,14 @@ selstart(int col, int row, int snap)
+ sel.alt = IS_SET(MODE_ALTSCREEN);
+ sel.snap = snap;
+ sel.oe.x = sel.ob.x = col;
+- sel.oe.y = sel.ob.y = row;
++ sel.oe.y = sel.ob.y = row + !sel.alt * (histMode ? histOff : insertOff);
++ if (sel.snap != 0) sel.mode = SEL_READY;
+ selnormalize();
+-
+- if (sel.snap != 0)
+- sel.mode = SEL_READY;
+- tsetdirt(sel.nb.y, sel.ne.y);
+ }
+
+ void
+ selextend(int col, int row, int type, int done)
+ {
+- int oldey, oldex, oldsby, oldsey, oldtype;
+-
+ if (sel.mode == SEL_IDLE)
+ return;
+ if (done && sel.mode == SEL_EMPTY) {
+@@ -452,51 +569,13 @@ selextend(int col, int row, int type, int done)
+ return;
+ }
+
+- oldey = sel.oe.y;
+- oldex = sel.oe.x;
+- oldsby = sel.nb.y;
+- oldsey = sel.ne.y;
+- oldtype = sel.type;
+-
+ sel.oe.x = col;
+- sel.oe.y = row;
++ sel.oe.y = row + (sel.alt ? 0 : (histMode ? histOff : insertOff));
+ selnormalize();
+ sel.type = type;
+-
+- 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;
+ }
+
+-void
+-selnormalize(void)
+-{
+- int i;
+-
+- if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
+- sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
+- sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
+- } else {
+- sel.nb.x = MIN(sel.ob.x, sel.oe.x);
+- sel.ne.x = MAX(sel.ob.x, sel.oe.x);
+- }
+- sel.nb.y = MIN(sel.ob.y, sel.oe.y);
+- sel.ne.y = MAX(sel.ob.y, sel.oe.y);
+-
+- selsnap(&sel.nb.x, &sel.nb.y, -1);
+- selsnap(&sel.ne.x, &sel.ne.y, +1);
+-
+- /* expand selection over line breaks */
+- if (sel.type == SEL_RECTANGULAR)
+- return;
+- i = tlinelen(sel.nb.y);
+- if (i < sel.nb.x)
+- sel.nb.x = i;
+- if (tlinelen(sel.ne.y) <= sel.ne.x)
+- sel.ne.x = term.col - 1;
+-}
+-
+ int
+ selected(int x, int y)
+ {
+@@ -508,119 +587,47 @@ selected(int x, int y)
+ return BETWEEN(y, sel.nb.y, sel.ne.y)
+ && BETWEEN(x, sel.nb.x, sel.ne.x);
+
+- 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);
+-}
+-
+-void
+-selsnap(int *x, int *y, int direction)
+-{
+- int newx, newy, xt, yt;
+- int delim, prevdelim;
+- Glyph *gp, *prevgp;
+-
+- switch (sel.snap) {
+- case SNAP_WORD:
+- /*
+- * Snap around if the word wraps around at the end or
+- * beginning of a line.
+- */
+- prevgp = &term.line[*y][*x];
+- prevdelim = ISDELIM(prevgp->u);
+- for (;;) {
+- newx = *x + direction;
+- newy = *y;
+- if (!BETWEEN(newx, 0, term.col - 1)) {
+- newy += direction;
+- newx = (newx + term.col) % term.col;
+- if (!BETWEEN(newy, 0, term.row - 1))
+- break;
+-
+- if (direction > 0)
+- yt = *y, xt = *x;
+- else
+- yt = newy, xt = newx;
+- if (!(term.line[yt][xt].mode & ATTR_WRAP))
+- break;
+- }
+-
+- if (newx >= tlinelen(newy))
+- break;
+-
+- gp = &term.line[newy][newx];
+- delim = ISDELIM(gp->u);
+- if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+- || (delim && gp->u != prevgp->u)))
+- break;
+-
+- *x = newx;
+- *y = newy;
+- prevgp = gp;
+- prevdelim = delim;
+- }
+- break;
+- case SNAP_LINE:
+- /*
+- * Snap around if the the previous line or the current one
+- * has set ATTR_WRAP at its end. Then the whole next or
+- * previous line will be selected.
+- */
+- *x = (direction < 0) ? 0 : term.col - 1;
+- if (direction < 0) {
+- for (; *y > 0; *y += direction) {
+- if (!(term.line[*y-1][term.col-1].mode
+- & ATTR_WRAP)) {
+- break;
+- }
+- }
+- } else if (direction > 0) {
+- for (; *y < term.row-1; *y += direction) {
+- if (!(term.line[*y][term.col-1].mode
+- & ATTR_WRAP)) {
+- break;
+- }
+- }
+- }
+- break;
+- }
++ return ((sel.nb.y > sel.ne.y) ? OUT(y, sel.nb.y, sel.ne.y)
++ : BETWEEN(y, sel.nb.y, sel.ne.y)) &&
++ (y != sel.nb.y || x >= sel.nb.x) &&
++ (y != sel.ne.y || x <= sel.ne.x);
+ }
+
+ char *
+ getsel(void)
+ {
+ char *str, *ptr;
+- int y, bufsize, lastx, linelen;
++ int y, yy, bufsize, lastx;
+ Glyph *gp, *last;
+
+ if (sel.ob.x == -1)
+ return NULL;
+
+- bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
++ int const start = sel.swap ? sel.oe.y : sel.ob.y, h = rows();
++ int endy = (sel.swap ? sel.ob.y : sel.oe.y);
++ for (; endy < start; endy += h);
++ Line * const cbuf = IS_SET(MODE_ALTSCREEN) ? term.line : buf;
++ bufsize = (term.col+1) * (endy-start+1 ) * UTF_SIZ;
++ assert(bufsize > 0);
+ ptr = str = xmalloc(bufsize);
+
+ /* append every set & selected glyph to the selection */
+- for (y = sel.nb.y; y <= sel.ne.y; y++) {
+- if ((linelen = tlinelen(y)) == 0) {
+- *ptr++ = '\n';
+- continue;
+- }
++ for (y = start; y <= endy; y++) {
++ yy = y % h;
+
+ if (sel.type == SEL_RECTANGULAR) {
+- gp = &term.line[y][sel.nb.x];
++ gp = &cbuf[yy][sel.nb.x];
+ lastx = sel.ne.x;
+ } else {
+- gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+- lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
++ gp = &cbuf[yy][start == y ? sel.nb.x : 0];
++ lastx = (endy == y) ? sel.ne.x : term.col-1;
+ }
+- last = &term.line[y][MIN(lastx, linelen-1)];
+- while (last >= gp && last->u == ' ')
+- --last;
++ last = &cbuf[yy][lastx];
++ if (!(cbuf[yy][term.col - 1].mode & ATTR_WRAP))
++ while (last > gp && last->u == ' ') --last;
+
+ for ( ; gp <= last; ++gp) {
+- if (gp->mode & ATTR_WDUMMY)
+- continue;
+-
++ if (gp->mode & ATTR_WDUMMY) continue;
+ ptr += utf8encode(gp->u, ptr);
+ }
+
+@@ -633,7 +640,7 @@ getsel(void)
+ * st.
+ * FIXME: Fix the computer world.
+ */
+- if ((y < sel.ne.y || lastx >= linelen) &&
++ if ((y < endy || lastx == term.col - 1) &&
+ (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
+ *ptr++ = '\n';
+ }
+@@ -648,7 +655,7 @@ selclear(void)
+ return;
+ sel.mode = SEL_IDLE;
+ sel.ob.x = -1;
+- tsetdirt(sel.nb.y, sel.ne.y);
++ selnormalize();
+ }
+
+ void
+@@ -1000,8 +1007,7 @@ tfulldirt(void)
+ void
+ tcursor(int mode)
+ {
+- static TCursor c[2];
+- int alt = IS_SET(MODE_ALTSCREEN);
++ int alt = (histOp) ? 0 : (IS_SET(MODE_ALTSCREEN) + 1);
+
+ if (mode == CURSOR_SAVE) {
+ c[alt] = term.c;
+@@ -1061,6 +1067,7 @@ tswapscreen(void)
+ void
+ tscrolldown(int orig, int n)
+ {
++ if (!orig && historyBufferScroll(-n)) return;
+ int i;
+ Line temp;
+
+@@ -1081,6 +1088,7 @@ tscrolldown(int orig, int n)
+ void
+ tscrollup(int orig, int n)
+ {
++ if (!orig && historyBufferScroll(n)) return;
+ int i;
+ Line temp;
+
+@@ -1232,8 +1240,8 @@ tclearregion(int x1, int y1, int x2, int y2)
+ if (y1 > y2)
+ temp = y1, y1 = y2, y2 = temp;
+
+- LIMIT(x1, 0, term.col-1);
+- LIMIT(x2, 0, term.col-1);
++ LIMIT(x1, 0, buffCols-1);
++ LIMIT(x2, 0, buffCols-1);
+ LIMIT(y1, 0, term.row-1);
+ LIMIT(y2, 0, term.row-1);
+
+@@ -2394,8 +2402,6 @@ check_control_code:
+ */
+ return;
+ }
+- if (selected(term.c.x, term.c.y))
+- selclear();
+
+ gp = &term.line[term.c.y][term.c.x];
+ if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
+@@ -2465,8 +2471,10 @@ void
+ tresize(int col, int row)
+ {
+ int i;
+- int minrow = MIN(row, term.row);
+- int mincol = MIN(col, term.col);
++ int const colSet = col, alt = IS_SET(MODE_ALTSCREEN), ini = buf == NULL;
++ col = MAX(col, buffCols);
++ row = MIN(row, buffSize);
++ int const minrow = MIN(row, term.row), mincol = MIN(col, buffCols);
+ int *bp;
+ TCursor c;
+
+@@ -2475,6 +2483,7 @@ tresize(int col, int row)
+ "tresize: error resizing to %dx%d\n", col, row);
+ return;
+ }
++ if (alt) tswapscreen();
+
+ /*
+ * slide screen to keep cursor where we expect it -
+@@ -2482,48 +2491,54 @@ tresize(int col, int row)
+ * memmove because we're freeing the earlier lines
+ */
+ for (i = 0; i <= term.c.y - row; i++) {
+- free(term.line[i]);
+ free(term.alt[i]);
+ }
+ /* 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));
+ }
+ 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));
++ buf = xrealloc(buf, (buffSize + row) * sizeof(Line));
+ term.alt = xrealloc(term.alt, row * sizeof(Line));
+ term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
++ mark = xrealloc(mark, col * row * sizeof(*mark));
+ term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+
+ /* 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));
+ }
+
+ /* allocate any new rows */
+ for (/* i = minrow */; i < row; i++) {
+- term.line[i] = xmalloc(col * sizeof(Glyph));
+ term.alt[i] = xmalloc(col * sizeof(Glyph));
+ }
+- if (col > term.col) {
+- bp = term.tabs + term.col;
++ if (col > buffCols) {
++ bp = term.tabs + buffCols;
+
+- memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
++ memset(bp, 0, sizeof(*term.tabs) * (col - buffCols));
+ while (--bp > term.tabs && !*bp)
+ /* nothing */ ;
+ for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+ *bp = 1;
+ }
++ Glyph g=(Glyph){.bg=term.c.attr.bg, .fg=term.c.attr.fg, .u=' ', .mode=0};
++ for (i = 0; i < buffSize; ++i) {
++ buf[i] = xrealloc(ini ? NULL : buf[i], col*sizeof(Glyph));
++ for (int j = ini ? 0 : buffCols; j < col; ++j) buf[i][j] = g;
++ }
++ for (i = 0; i < row; ++i) buf[buffSize + i] = buf[i];
++ term.line = &buf[*(histOp?&histOff:&insertOff) +=MAX(term.c.y-row+1,0)];
++ memset(mark, 0, col * row * sizeof(*mark));
+ /* update terminal size */
+- term.col = col;
++ term.col = colSet;
++ buffCols = col;
+ term.row = row;
++ if (alt) tswapscreen();
+ /* reset scrolling region */
+ tsetscroll(0, row-1);
+ /* make use of the LIMIT in tmoveto */
+@@ -2552,15 +2567,17 @@ resettitle(void)
+ void
+ drawregion(int x1, int y1, int x2, int y2)
+ {
++ if (altToggle && histMode && !histOp)
++ memset(term.dirty, 0, sizeof(*term.dirty) * term.row);
++ int const o = !IS_SET(MODE_ALTSCREEN) && histMode && !histOp, h =rows();
+ int y;
+
+ for (y = y1; y < y2; y++) {
+- if (!term.dirty[y])
+- continue;
+-
+- term.dirty[y] = 0;
+- xdrawline(term.line[y], x1, y, x2);
++ int const oy = o ? (y + insertOff - histOff + h) % h : y;
++ if (!BETWEEN(oy, 0, term.row-1) || !term.dirty[y]) continue;
++ xdrawline(term.line[y], x1, oy, x2);
+ }
++ memset(&term.dirty[y1], 0, sizeof(*term.dirty) * (y2 - y1));
+ }
+
+ void
+@@ -2579,7 +2596,9 @@ draw(void)
+ if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
+ cx--;
+
++ if (histMode) historyPreDraw();
+ drawregion(0, 0, term.col, term.row);
++ if (!histMode)
+ xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+ term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+ term.ocx = cx;
+diff --git a/st.h b/st.h
+index 3d351b6..ad2915f 100644
+--- a/st.h
++++ b/st.h
+@@ -8,6 +8,7 @@
+ #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)
+@@ -89,6 +90,7 @@ 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(char *, char *, char *, char **);
+diff --git a/utils.h b/utils.h
+new file mode 100644
+index 0000000..ca435e6
+--- /dev/null
++++ b/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));
++}
+diff --git a/win.h b/win.h
+index a6ef1b9..cea19f3 100644
+--- a/win.h
++++ b/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,
+ };
+diff --git a/x.c b/x.c
+index 210f184..643e870 100644
+--- a/x.c
++++ b/x.c
+@@ -19,6 +19,7 @@ char *argv0;
+ #include "arg.h"
+ #include "st.h"
+ #include "win.h"
++#include "normalMode.h"
+
+ /* types used in config.h */
+ typedef struct {
+@@ -261,6 +262,7 @@ clipcopy(const Arg *dummy)
+
+ free(xsel.clipboard);
+ xsel.clipboard = NULL;
++ xsetsel(getsel());
+
+ if (xsel.primary != NULL) {
+ xsel.clipboard = xstrdup(xsel.primary);
+@@ -460,7 +462,6 @@ void
+ bpress(XEvent *e)
+ {
+ struct timespec now;
+- int snap;
+
+ if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) {
+ mousereport(e);
+@@ -476,17 +477,34 @@ 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);
+ }
+ }
+
+@@ -691,8 +709,7 @@ brelease(XEvent *e)
+
+ if (mouseaction(e, 1))
+ return;
+- if (e->xbutton.button == Button1)
+- mousesel(e, 1);
++ if (e->xbutton.button == Button1 && !IS_SET(MODE_NORMAL)) mousesel(e, 1);
+ }
+
+ void
+@@ -772,6 +789,8 @@ 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)
+ {
+@@ -1225,8 +1244,10 @@ 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)
+@@ -1609,6 +1630,7 @@ 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))
+@@ -1800,6 +1822,11 @@ kpress(XEvent *ev)
+ len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status);
+ 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;
++ }
+ /* 1. shortcuts */
+ for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
+ if (ksym == bp->keysym && match(bp->mod, e->state)) {
