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OrionOS/quill/quill.c
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nmemmertandClaude Sonnet 4.6 ab4bca672d Fix lens.c compile error: add missing Xft/fontconfig headers 
- lens.c: add #include <X11/Xft/Xft.h> and <fontconfig/fontconfig.h>
  (XftFont, XGlyphInfo, etc. were declared but the header was never included)
- quill.c: remove unused flen variable in ed_find_next()
- rigel.c: remove unused get_file() helper (get_fidx() is used throughout)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-24 10:21:39 -04:00

840 lines
28 KiB
C
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/* quill.c — OrionOS Text Editor
* Named for the writing instrument. Native C/Xlib, no GTK.
*
* Keybindings:
* Ctrl+N New file
* Ctrl+O Open file (shows path bar)
* Ctrl+S Save
* Ctrl+F Find (Esc or Enter to dismiss)
* Ctrl+Z Undo (single snapshot)
* Ctrl+Left/Right Word skip
* Ctrl+Home/End File start/end
* Ctrl+G Go to line
*/
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/Xft/Xft.h>
#include <fontconfig/fontconfig.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>
/* ── Geometry ─────────────────────────────────────────────── */
#define WIN_W 900
#define WIN_H 620
#define HDR_H 38
#define STAT_H 22
#define GUTTER_W 54
#define ROW_H 18
#define TEXT_X GUTTER_W
#define TEXT_Y HDR_H
#define TEXT_W (WIN_W - GUTTER_W)
#define TEXT_H (WIN_H - HDR_H - STAT_H)
#define VIS_ROWS (TEXT_H / ROW_H)
/* find bar overlays bottom of text area */
#define FIND_H 28
#define FIND_Y (WIN_H - STAT_H - FIND_H)
/* ── Buffer ───────────────────────────────────────────────── */
#define MAX_LINES 8192
#define LINE_CAP 2048
/* ── Palette ──────────────────────────────────────────────── */
#define C_BG 0x0D1117UL
#define C_HDR 0x090C12UL
#define C_GUTTER 0x0A0E16UL
#define C_CURLINE 0x13192AUL
#define C_BORDER 0x1A2035UL
#define C_TEXT 0xCDD6F4UL
#define C_DIM 0x3A4860UL
#define C_LINENUM 0x4A5880UL
#define C_ACCENT 0x1E58A8UL
#define C_CURSOR 0x89B4FAUL
#define C_FIND_BG 0x141A28UL
#define C_FIND_HL 0x264878UL
#define C_MOD 0xF38BA8UL
#define C_SAVED 0xA6E3A1UL
#define C_SEL 0x1E3A5AUL
/* ── Editor state ─────────────────────────────────────────── */
typedef struct {
char lines[MAX_LINES][LINE_CAP];
int nlines;
int cur; /* cursor line */
int col; /* cursor column */
int scroll; /* first visible line */
char path[4096];
int modified;
/* find */
char find[128];
int find_len;
int find_on; /* find bar visible */
/* open overlay */
char open_buf[4096];
int open_len;
int open_on;
/* goto overlay */
char goto_buf[16];
int goto_len;
int goto_on;
/* undo */
char undo_lines[MAX_LINES][LINE_CAP];
int undo_nlines, undo_cur, undo_col;
int undo_valid;
} Editor;
/* ── App state ────────────────────────────────────────────── */
static Display *dpy;
static int scr;
static Window win;
static GC gc;
static Pixmap buf;
static XftFont *fmono; /* editor body font */
static XftFont *fui; /* UI chrome font */
static Visual *vis;
static Colormap cmap;
static int depth;
static Atom wm_del;
static int running = 1;
static int dirty = 1;
static int char_w = 0;
static Editor ed;
/* ── Colour helpers ───────────────────────────────────────── */
static unsigned long px(unsigned long rgb) {
XColor c;
c.red = ((rgb >> 16) & 0xFF) * 257;
c.green = ((rgb >> 8) & 0xFF) * 257;
c.blue = ( rgb & 0xFF) * 257;
c.flags = DoRed | DoGreen | DoBlue;
XAllocColor(dpy, cmap, &c);
return c.pixel;
}
static void fill(int x, int y, int w, int h, unsigned long rgb) {
XSetForeground(dpy, gc, px(rgb));
XFillRectangle(dpy, buf, gc, x, y, w, h);
}
static void rect(int x, int y, int w, int h, unsigned long rgb) {
XSetForeground(dpy, gc, px(rgb));
XDrawRectangle(dpy, buf, gc, x, y, w - 1, h - 1);
}
static void hline(int x, int y, int w, unsigned long rgb) {
XSetForeground(dpy, gc, px(rgb));
XDrawLine(dpy, buf, gc, x, y, x + w - 1, y);
}
static XftColor xftc(unsigned long rgb) {
XftColor c;
XRenderColor rc = {
.red = ((rgb >> 16) & 0xFF) * 257,
.green = ((rgb >> 8) & 0xFF) * 257,
.blue = ( rgb & 0xFF) * 257,
.alpha = 0xFFFF
};
XftColorAllocValue(dpy, vis, cmap, &rc, &c);
return c;
}
static void xft_str(XftDraw *xd, XftFont *f, unsigned long rgb,
int x, int y, const char *s, int len) {
XftColor c = xftc(rgb);
XftDrawStringUtf8(xd, &c, f, x, y, (const FcChar8 *)s, len);
XftColorFree(dpy, vis, cmap, &c);
}
static int text_w(XftFont *f, const char *s, int len) {
XGlyphInfo ext;
XftTextExtentsUtf8(dpy, f, (const FcChar8 *)s, len, &ext);
return ext.xOff;
}
/* baseline for vertically centred text in a band */
static int baseline(XftFont *f, int y, int h) {
return y + (h + f->ascent - f->descent) / 2;
}
/* ── Editor operations ────────────────────────────────────── */
static void ed_save_undo(void) {
memcpy(ed.undo_lines, ed.lines, sizeof(ed.lines));
ed.undo_nlines = ed.nlines;
ed.undo_cur = ed.cur;
ed.undo_col = ed.col;
ed.undo_valid = 1;
}
static void ed_undo(void) {
if (!ed.undo_valid) return;
memcpy(ed.lines, ed.undo_lines, sizeof(ed.lines));
ed.nlines = ed.undo_nlines;
ed.cur = ed.undo_cur;
ed.col = ed.undo_col;
ed.modified = 1;
ed.undo_valid = 0;
}
static void ed_clamp_col(void) {
int len = (int)strlen(ed.lines[ed.cur]);
if (ed.col > len) ed.col = len;
}
static void ed_ensure_visible(void) {
if (ed.cur < ed.scroll)
ed.scroll = ed.cur;
else if (ed.cur >= ed.scroll + VIS_ROWS)
ed.scroll = ed.cur - VIS_ROWS + 1;
if (ed.scroll < 0) ed.scroll = 0;
}
static void ed_init(void) {
memset(&ed, 0, sizeof(ed));
ed.lines[0][0] = '\0';
ed.nlines = 1;
}
static void ed_load(const char *path) {
FILE *f = fopen(path, "r");
if (!f) return;
ed.nlines = 0;
while (ed.nlines < MAX_LINES &&
fgets(ed.lines[ed.nlines], LINE_CAP, f)) {
char *ln = ed.lines[ed.nlines];
int len = (int)strlen(ln);
if (len > 0 && ln[len-1] == '\n') ln[len-1] = '\0';
ed.nlines++;
}
if (ed.nlines == 0) { ed.lines[0][0] = '\0'; ed.nlines = 1; }
fclose(f);
snprintf(ed.path, sizeof(ed.path), "%s", path);
ed.cur = ed.col = ed.scroll = 0;
ed.modified = 0;
ed.undo_valid = 0;
}
static void ed_save(void) {
if (!ed.path[0]) return;
FILE *f = fopen(ed.path, "w");
if (!f) return;
for (int i = 0; i < ed.nlines; i++)
fprintf(f, "%s\n", ed.lines[i]);
fclose(f);
ed.modified = 0;
}
static void ed_insert(char c) {
char *line = ed.lines[ed.cur];
int len = (int)strlen(line);
if (len >= LINE_CAP - 1) return;
memmove(line + ed.col + 1, line + ed.col, len - ed.col + 1);
line[ed.col++] = c;
ed.modified = 1;
}
static void ed_backspace(void) {
if (ed.col > 0) {
char *line = ed.lines[ed.cur];
int len = (int)strlen(line);
memmove(line + ed.col - 1, line + ed.col, len - ed.col + 1);
ed.col--;
} else if (ed.cur > 0) {
char *prev = ed.lines[ed.cur - 1];
char *curr = ed.lines[ed.cur];
int plen = (int)strlen(prev);
int clen = (int)strlen(curr);
if (plen + clen < LINE_CAP - 1) {
memcpy(prev + plen, curr, clen + 1);
memmove(ed.lines + ed.cur, ed.lines + ed.cur + 1,
(ed.nlines - ed.cur - 1) * LINE_CAP);
ed.nlines--;
ed.col = plen;
ed.cur--;
}
}
ed.modified = 1;
}
static void ed_delete(void) {
char *line = ed.lines[ed.cur];
int len = (int)strlen(line);
if (ed.col < len) {
memmove(line + ed.col, line + ed.col + 1, len - ed.col);
ed.modified = 1;
} else if (ed.cur < ed.nlines - 1) {
char *next = ed.lines[ed.cur + 1];
int nlen = (int)strlen(next);
if (len + nlen < LINE_CAP - 1) {
memcpy(line + len, next, nlen + 1);
memmove(ed.lines + ed.cur + 1, ed.lines + ed.cur + 2,
(ed.nlines - ed.cur - 2) * LINE_CAP);
ed.nlines--;
ed.modified = 1;
}
}
}
static void ed_newline(void) {
if (ed.nlines >= MAX_LINES) return;
memmove(ed.lines + ed.cur + 2, ed.lines + ed.cur + 1,
(ed.nlines - ed.cur - 1) * LINE_CAP);
ed.nlines++;
char *curr = ed.lines[ed.cur];
char *next = ed.lines[ed.cur + 1];
int tail = (int)strlen(curr + ed.col);
memcpy(next, curr + ed.col, tail + 1);
curr[ed.col] = '\0';
/* auto-indent: copy leading whitespace */
int ws = 0;
while (curr[ws] == ' ' || curr[ws] == '\t') ws++;
if (ws > 0 && ws + tail < LINE_CAP - 1) {
memmove(next + ws, next, tail + 1);
memcpy(next, curr, ws);
ed.col = ws;
} else {
ed.col = 0;
}
ed.cur++;
ed.modified = 1;
}
static void ed_word_left(void) {
if (ed.col == 0) {
if (ed.cur > 0) { ed.cur--; ed.col = (int)strlen(ed.lines[ed.cur]); }
return;
}
ed.col--;
char *l = ed.lines[ed.cur];
while (ed.col > 0 && !isalnum((unsigned char)l[ed.col - 1]))
ed.col--;
while (ed.col > 0 && isalnum((unsigned char)l[ed.col - 1]))
ed.col--;
}
static void ed_word_right(void) {
char *l = ed.lines[ed.cur];
int len = (int)strlen(l);
if (ed.col == len) {
if (ed.cur < ed.nlines - 1) { ed.cur++; ed.col = 0; }
return;
}
while (ed.col < len && !isalnum((unsigned char)l[ed.col])) ed.col++;
while (ed.col < len && isalnum((unsigned char)l[ed.col])) ed.col++;
}
/* find: returns line of next match, -1 if none */
static int ed_find_next(int from_line, int from_col) {
if (!ed.find[0]) return -1;
for (int pass = 0; pass < 2; pass++) {
int start_line = (pass == 0) ? from_line : 0;
for (int i = start_line; i < ed.nlines; i++) {
char *s = ed.lines[i];
int start_c = (i == from_line && pass == 0) ? from_col : 0;
char *found = strstr(s + start_c, ed.find);
if (found) {
ed.cur = i;
ed.col = (int)(found - s);
ed_ensure_visible();
return i;
}
}
/* wrap: search from beginning */
}
return -1;
}
/* ── Window title ─────────────────────────────────────────── */
static void set_title(void) {
char t[4096 + 32];
const char *name = ed.path[0] ? strrchr(ed.path, '/') : NULL;
name = name ? name + 1 : (ed.path[0] ? ed.path : "[untitled]");
snprintf(t, sizeof(t), "Quill — %s%s", name, ed.modified ? " *" : "");
XStoreName(dpy, win, t);
}
/* ── Drawing ──────────────────────────────────────────────── */
static void redraw(void) {
XftDraw *xd = XftDrawCreate(dpy, buf, vis, cmap);
/* header */
fill(0, 0, WIN_W, HDR_H, C_HDR);
hline(0, HDR_H - 1, WIN_W, C_BORDER);
/* gutter */
fill(0, HDR_H, GUTTER_W, TEXT_H, C_GUTTER);
hline(GUTTER_W, HDR_H, 1, C_BORDER);
/* text area background */
fill(TEXT_X, TEXT_Y, TEXT_W, TEXT_H, C_BG);
/* status bar */
fill(0, WIN_H - STAT_H, WIN_W, STAT_H, C_HDR);
hline(0, WIN_H - STAT_H, WIN_W, C_BORDER);
/* find bar overlay */
if (ed.find_on) {
fill(0, FIND_Y, WIN_W, FIND_H, C_FIND_BG);
hline(0, FIND_Y, WIN_W, C_BORDER);
}
/* visible lines */
for (int row = 0; row < VIS_ROWS; row++) {
int lnum = ed.scroll + row;
if (lnum >= ed.nlines) break;
int ry = TEXT_Y + row * ROW_H;
int bl = baseline(fmono, ry, ROW_H);
/* current line highlight */
if (lnum == ed.cur)
fill(0, ry, WIN_W, ROW_H, C_CURLINE);
/* line number */
char num[12];
snprintf(num, sizeof(num), "%d", lnum + 1);
int nw = text_w(fui, num, (int)strlen(num));
xft_str(xd, fui, C_LINENUM,
GUTTER_W - nw - 8, baseline(fui, ry, ROW_H),
num, (int)strlen(num));
/* line text */
char *line = ed.lines[lnum];
int llen = (int)strlen(line);
if (llen > 0)
xft_str(xd, fmono, C_TEXT, TEXT_X + 4, bl, line, llen);
/* find highlights */
if (ed.find_on && ed.find[0]) {
char *s = line;
char *p;
while ((p = strstr(s, ed.find)) != NULL) {
int fx = TEXT_X + 4 + text_w(fmono, line, (int)(p - line));
int fw = text_w(fmono, ed.find, ed.find_len);
fill(fx, ry, fw, ROW_H, C_FIND_HL);
xft_str(xd, fmono, C_TEXT, fx, bl, ed.find, ed.find_len);
s = p + ed.find_len;
}
}
/* cursor */
if (lnum == ed.cur) {
int cx = TEXT_X + 4 + text_w(fmono, line, ed.col);
fill(cx, ry, 2, ROW_H, C_CURSOR);
}
}
/* ── header chrome ─────────────────────────────────────── */
if (ed.open_on) {
/* open-file path bar in header */
fill(4, 6, WIN_W - 8, HDR_H - 12, C_FIND_BG);
rect(4, 6, WIN_W - 8, HDR_H - 12, C_ACCENT);
int bl2 = baseline(fmono, 6, HDR_H - 12);
xft_str(xd, fui, C_DIM, 10, bl2, "Open: ", 6);
int pfx = 10 + text_w(fui, "Open: ", 6);
if (ed.open_len > 0)
xft_str(xd, fmono, C_TEXT, pfx, bl2, ed.open_buf, ed.open_len);
/* cursor */
int cx = pfx + text_w(fmono, ed.open_buf, ed.open_len);
fill(cx, 8, 2, HDR_H - 16, C_CURSOR);
} else if (ed.goto_on) {
fill(4, 6, 200, HDR_H - 12, C_FIND_BG);
rect(4, 6, 200, HDR_H - 12, C_ACCENT);
int bl2 = baseline(fmono, 6, HDR_H - 12);
xft_str(xd, fui, C_DIM, 10, bl2, "Go to line: ", 12);
int pfx = 10 + text_w(fui, "Go to line: ", 12);
if (ed.goto_len > 0)
xft_str(xd, fmono, C_TEXT, pfx, bl2, ed.goto_buf, ed.goto_len);
int cx = pfx + text_w(fmono, ed.goto_buf, ed.goto_len);
fill(cx, 8, 2, HDR_H - 16, C_CURSOR);
} else {
/* normal header: filename */
const char *name = ed.path[0] ? strrchr(ed.path, '/') : NULL;
name = name ? name + 1 : (ed.path[0] ? ed.path : "[untitled]");
int bl2 = baseline(fui, 0, HDR_H);
xft_str(xd, fui, C_TEXT, 12, bl2, name, (int)strlen(name));
if (ed.modified) {
int nx = 12 + text_w(fui, name, (int)strlen(name));
xft_str(xd, fui, C_MOD, nx + 6, bl2, "●", 3);
}
/* right side hints */
const char *hint = "Ctrl+S Save Ctrl+O Open Ctrl+F Find";
int hw = text_w(fui, hint, (int)strlen(hint));
xft_str(xd, fui, C_DIM, WIN_W - hw - 12, bl2, hint, (int)strlen(hint));
}
/* ── find bar ───────────────────────────────────────────── */
if (ed.find_on) {
int bl2 = baseline(fmono, FIND_Y, FIND_H);
xft_str(xd, fui, C_DIM, 10, bl2, "Find: ", 6);
int pfx = 10 + text_w(fui, "Find: ", 6);
if (ed.find_len > 0)
xft_str(xd, fmono, C_TEXT, pfx, bl2, ed.find, ed.find_len);
int cx = pfx + text_w(fmono, ed.find, ed.find_len);
fill(cx, FIND_Y + 4, 2, FIND_H - 8, C_CURSOR);
xft_str(xd, fui, C_DIM, cx + 10, bl2, "Enter: next Esc: close", 23);
}
/* ── status bar ─────────────────────────────────────────── */
{
char stat[128];
snprintf(stat, sizeof(stat), "Line %d, Col %d %d lines",
ed.cur + 1, ed.col + 1, ed.nlines);
int bl2 = baseline(fui, WIN_H - STAT_H, STAT_H);
xft_str(xd, fui, C_DIM, 12, bl2, stat, (int)strlen(stat));
const char *enc = "UTF-8";
int ew = text_w(fui, enc, 5);
xft_str(xd, fui, C_DIM, WIN_W - ew - 12, bl2, enc, 5);
}
XftDrawDestroy(xd);
XCopyArea(dpy, buf, win, gc, 0, 0, WIN_W, WIN_H, 0, 0);
XFlush(dpy);
}
/* ── Key handling ─────────────────────────────────────────── */
static void handle_key(XKeyEvent *ev) {
char text[32] = {0};
KeySym ksym = 0;
int n = XLookupString(ev, text, sizeof(text)-1, &ksym, NULL);
int ctrl = (ev->state & ControlMask) != 0;
int shift = (ev->state & ShiftMask) != 0;
/* ── open-file overlay ─────────────────────────────────── */
if (ed.open_on) {
if (ksym == XK_Escape) { ed.open_on = 0; }
else if (ksym == XK_Return) {
if (ed.open_buf[0]) ed_load(ed.open_buf);
ed.open_on = 0;
} else if (ksym == XK_BackSpace) {
if (ed.open_len > 0) ed.open_buf[--ed.open_len] = '\0';
} else if (n > 0 && (unsigned char)text[0] >= 0x20) {
if (ed.open_len < (int)sizeof(ed.open_buf) - 1) {
ed.open_buf[ed.open_len++] = text[0];
ed.open_buf[ed.open_len] = '\0';
}
}
dirty = 1; return;
}
/* ── goto overlay ──────────────────────────────────────── */
if (ed.goto_on) {
if (ksym == XK_Escape) { ed.goto_on = 0; }
else if (ksym == XK_Return) {
int target = atoi(ed.goto_buf) - 1;
if (target >= 0 && target < ed.nlines) {
ed.cur = target; ed.col = 0; ed_ensure_visible();
}
ed.goto_on = 0;
} else if (ksym == XK_BackSpace) {
if (ed.goto_len > 0) ed.goto_buf[--ed.goto_len] = '\0';
} else if (n > 0 && isdigit((unsigned char)text[0])) {
if (ed.goto_len < 9) {
ed.goto_buf[ed.goto_len++] = text[0];
ed.goto_buf[ed.goto_len] = '\0';
}
}
dirty = 1; return;
}
/* ── find bar ──────────────────────────────────────────── */
if (ed.find_on) {
if (ksym == XK_Escape) {
ed.find_on = 0;
} else if (ksym == XK_Return) {
ed_find_next(ed.cur, ed.col + 1);
} else if (ksym == XK_BackSpace) {
if (ed.find_len > 0) {
ed.find[--ed.find_len] = '\0';
ed_find_next(0, 0);
}
} else if (n > 0 && (unsigned char)text[0] >= 0x20) {
if (ed.find_len < 127) {
ed.find[ed.find_len++] = text[0];
ed.find[ed.find_len] = '\0';
ed_find_next(0, 0);
}
}
dirty = 1; return;
}
/* ── global shortcuts ──────────────────────────────────── */
if (ctrl) {
switch (ksym) {
case XK_n:
ed_save_undo();
ed_init();
dirty = 1; return;
case XK_o:
memset(ed.open_buf, 0, sizeof(ed.open_buf));
ed.open_len = 0;
ed.open_on = 1;
dirty = 1; return;
case XK_s:
if (!ed.path[0]) {
memset(ed.open_buf, 0, sizeof(ed.open_buf));
ed.open_len = 0;
ed.open_on = 1;
} else {
ed_save();
set_title();
}
dirty = 1; return;
case XK_f:
ed.find_on = 1;
ed.find[0] = '\0';
ed.find_len = 0;
dirty = 1; return;
case XK_z:
ed_undo();
ed_ensure_visible();
dirty = 1; return;
case XK_g:
memset(ed.goto_buf, 0, sizeof(ed.goto_buf));
ed.goto_len = 0;
ed.goto_on = 1;
dirty = 1; return;
case XK_Home:
ed.cur = 0; ed.col = 0; ed_ensure_visible();
dirty = 1; return;
case XK_End:
ed.cur = ed.nlines - 1;
ed.col = (int)strlen(ed.lines[ed.cur]);
ed_ensure_visible();
dirty = 1; return;
case XK_Left:
ed_word_left();
ed_ensure_visible();
dirty = 1; return;
case XK_Right:
ed_word_right();
ed_ensure_visible();
dirty = 1; return;
}
}
/* ── navigation ────────────────────────────────────────── */
switch (ksym) {
case XK_Up:
if (ed.cur > 0) { ed.cur--; ed_clamp_col(); }
ed_ensure_visible(); dirty = 1; return;
case XK_Down:
if (ed.cur < ed.nlines - 1) { ed.cur++; ed_clamp_col(); }
ed_ensure_visible(); dirty = 1; return;
case XK_Left:
if (ed.col > 0) ed.col--;
else if (ed.cur > 0) {
ed.cur--;
ed.col = (int)strlen(ed.lines[ed.cur]);
ed_ensure_visible();
}
dirty = 1; return;
case XK_Right:
if (ed.col < (int)strlen(ed.lines[ed.cur])) ed.col++;
else if (ed.cur < ed.nlines - 1) {
ed.cur++; ed.col = 0; ed_ensure_visible();
}
dirty = 1; return;
case XK_Home:
/* smart home: first non-ws char, then col 0 */
{
char *l = ed.lines[ed.cur];
int ws = 0;
while (l[ws] == ' ' || l[ws] == '\t') ws++;
ed.col = (ed.col != ws) ? ws : 0;
}
dirty = 1; return;
case XK_End:
ed.col = (int)strlen(ed.lines[ed.cur]);
dirty = 1; return;
case XK_Page_Up:
ed.cur -= VIS_ROWS;
if (ed.cur < 0) ed.cur = 0;
ed_clamp_col(); ed_ensure_visible();
dirty = 1; return;
case XK_Page_Down:
ed.cur += VIS_ROWS;
if (ed.cur >= ed.nlines) ed.cur = ed.nlines - 1;
ed_clamp_col(); ed_ensure_visible();
dirty = 1; return;
case XK_Escape:
ed.find_on = 0;
dirty = 1; return;
case XK_BackSpace:
ed_save_undo();
ed_backspace();
ed_ensure_visible();
dirty = 1; return;
case XK_Delete:
ed_save_undo();
ed_delete();
dirty = 1; return;
case XK_Return:
ed_save_undo();
ed_newline();
ed_ensure_visible();
dirty = 1; return;
case XK_Tab:
if (shift) {
/* unindent: remove leading spaces/tab */
char *l = ed.lines[ed.cur];
if (l[0] == '\t') {
memmove(l, l+1, strlen(l));
if (ed.col > 0) ed.col--;
} else {
int rm = 0;
while (rm < 4 && l[0] == ' ') {
memmove(l, l+1, strlen(l)); rm++;
if (ed.col > 0) ed.col--;
}
}
} else {
/* indent: insert 4 spaces */
for (int i = 0; i < 4; i++) ed_insert(' ');
}
ed.modified = 1;
dirty = 1; return;
}
/* ── printable text ─────────────────────────────────────── */
if (n > 0) {
for (int i = 0; i < n; i++) {
unsigned char c = (unsigned char)text[i];
if (c >= 0x20 || c == 0x09) {
if (ed.col == 0 && (int)strlen(ed.lines[ed.cur]) == 0)
ed_save_undo();
ed_insert((char)c);
}
}
ed_ensure_visible();
dirty = 1;
}
}
/* ── Mouse handling ───────────────────────────────────────── */
static void handle_button(XButtonEvent *ev) {
if (ev->y < HDR_H || ev->y >= WIN_H - STAT_H) return;
int ry = ev->y - TEXT_Y;
if (ry < 0) return;
int row = ry / ROW_H;
int lnum = ed.scroll + row;
if (lnum >= ed.nlines) return;
ed.cur = lnum;
/* click to column */
int click_x = ev->x - TEXT_X - 4;
char *line = ed.lines[lnum];
int len = (int)strlen(line);
int best = 0, bestd = abs(click_x);
for (int c = 1; c <= len; c++) {
int cx = text_w(fmono, line, c);
int d = abs(click_x - cx);
if (d < bestd) { bestd = d; best = c; }
}
ed.col = best;
dirty = 1;
}
static void handle_scroll(XButtonEvent *ev) {
int delta = (ev->button == Button4) ? -3 : 3;
ed.scroll += delta;
if (ed.scroll < 0) ed.scroll = 0;
int max_sc = ed.nlines - VIS_ROWS;
if (max_sc < 0) max_sc = 0;
if (ed.scroll > max_sc) ed.scroll = max_sc;
dirty = 1;
}
/* ── Main ─────────────────────────────────────────────────── */
int main(int argc, char **argv) {
dpy = XOpenDisplay(NULL);
if (!dpy) { fputs("quill: cannot open display\n", stderr); return 1; }
scr = DefaultScreen(dpy);
vis = DefaultVisual(dpy, scr);
cmap = DefaultColormap(dpy, scr);
depth = DefaultDepth(dpy, scr);
fmono = XftFontOpenName(dpy, scr, "Monospace:size=11");
if (!fmono) fmono = XftFontOpenName(dpy, scr, "Sans:size=11");
fui = XftFontOpenName(dpy, scr, "Sans:size=9");
if (!fui) fui = fmono;
/* measure monospace char width */
{
XGlyphInfo ext;
XftTextExtentsUtf8(dpy, fmono, (const FcChar8 *)"M", 1, &ext);
char_w = ext.xOff;
}
XSetWindowAttributes swa = {
.background_pixel = px(C_BG),
.event_mask = ExposureMask | KeyPressMask
| ButtonPressMask | StructureNotifyMask
};
win = XCreateWindow(dpy, RootWindow(dpy, scr),
100, 60, WIN_W, WIN_H, 0,
depth, InputOutput, vis,
CWBackPixel | CWEventMask, &swa);
buf = XCreatePixmap(dpy, win, WIN_W, WIN_H, depth);
gc = XCreateGC(dpy, buf, 0, NULL);
wm_del = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
XSetWMProtocols(dpy, win, &wm_del, 1);
/* set WM_CLASS */
XClassHint *ch = XAllocClassHint();
ch->res_name = "quill";
ch->res_class = "Quill";
XSetClassHint(dpy, win, ch);
XFree(ch);
ed_init();
if (argc > 1) ed_load(argv[1]);
set_title();
XMapWindow(dpy, win);
XFlush(dpy);
while (running) {
if (dirty && !XPending(dpy)) {
redraw();
set_title();
dirty = 0;
}
XEvent ev;
XNextEvent(dpy, &ev);
switch (ev.type) {
case Expose:
if (ev.xexpose.count == 0) dirty = 1;
break;
case KeyPress:
handle_key(&ev.xkey);
break;
case ButtonPress:
if (ev.xbutton.button == Button4 || ev.xbutton.button == Button5)
handle_scroll(&ev.xbutton);
else
handle_button(&ev.xbutton);
break;
case ClientMessage:
if ((Atom)ev.xclient.data.l[0] == wm_del) running = 0;
break;
}
}
XftFontClose(dpy, fmono);
if (fui != fmono) XftFontClose(dpy, fui);
XFreePixmap(dpy, buf);
XFreeGC(dpy, gc);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
return 0;
}
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