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neodotfiles/st/normalMode.c

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#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);
}
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