krzosa/text_editor
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Compare commits

base: krzosa:cda805574fa1c5c6d99f8a780e6cced2b5d48406
Branches Tags
krzosa:main krzosa:master
...
compare: krzosa:46d758c191eb3f6f0c28a277a51a193c16ad2aaf
Branches Tags
krzosa:main krzosa:master

4 Commits
cda805574f ... 46d758c191

Author SHA1 Message Date
KK
46d758c191 Make shell nicer 2026-07-03 22:10:53 +02:00
KK
b5c9e10477 Add shell 2026-07-03 21:37:20 +02:00
KK
8f4c7745f0 Building for web again 2026-07-03 21:32:40 +02:00
KK
b2c3cac73d Block allocator scratch 2026-07-03 21:14:23 +02:00
5 changed files with 184 additions and 16 deletions
Expand all files Collapse all files

49
build_web.sh
View File

@@ -1,9 +1,46 @@
#!/usr/bin/bash
set -e
incs="-Isrc/external/SDL/include -Isrc/external/lua/src -Isrc/external/glad -Lsrc/external/SDL/build_web -Isrc"
wasmflags="-sALLOW_MEMORY_GROWTH=1 -sMAXIMUM_MEMORY=1gb -msimd128 -sTOTAL_STACK=5MB -sINITIAL_MEMORY=256mb -sUSE_WEBGL2 -sFULL_ES3=1 -sUSE_SDL=3 -sASYNCIFY -sASSERTIONS=2"
flags="-Wall -Wno-missing-braces -Wno-writable-strings -nostdlib++ -fno-exceptions -fdiagnostics-absolute-paths"
dbg="-g -DDEBUG_BUILD=1 -gsource-map"
rel="-O3 -DDEBUG_BUILD=0"
for arg in "$@"; do declare "$arg"='1'; done
if [ ! -v release ]; then debug=1; fi
if [ -v debug ]; then echo "[web debug build]"; fi
if [ -v release ]; then echo "[web release build]"; fi
emcc -o text_editor.html --shell-file=data/shell.html $flags $incs $wasmflags $dbg -lm -lSDL3 src/text_editor/text_editor.cpp
# If emsdk is installed but not sourced in this shell, try the common location.
if ! command -v emcc >/dev/null 2>&1; then
if [ -f "$HOME/emsdk/emsdk_env.sh" ]; then
# shellcheck disable=SC1091
source "$HOME/emsdk/emsdk_env.sh" >/dev/null
fi
fi
if ! command -v emcc >/dev/null 2>&1; then
echo "error: emcc not found. Source emsdk_env.sh or add emcc to PATH." >&2
exit 1
fi
mkdir -p build_web
incs="-Isrc -Isrc/external/glad"
flags="-Wall -Wextra -Werror -Wno-error=experimental -Wno-error=unused-parameter -Wformat=2 -Wundef -Wshadow -Wno-missing-field-initializers -Wno-missing-braces -Wno-writable-strings \
-fdiagnostics-absolute-paths \
-nostdlib++ -fno-exceptions"
wasmflags="-sALLOW_MEMORY_GROWTH=0 -sTOTAL_STACK=5MB -sINITIAL_MEMORY=256MB \
-sUSE_SDL=3 -sUSE_WEBGL2=1 -sMIN_WEBGL_VERSION=2 -sMAX_WEBGL_VERSION=2 -sFULL_ES3=1 \
-sASYNCIFY=1 -sASSERTIONS=2 \
-sEXIT_RUNTIME=0 \
-msimd128"
if [ -v debug ]; then
flags="$flags -g -gsource-map -DDEBUG_BUILD=1"
else
flags="$flags -O3 -DDEBUG_BUILD=0"
fi
emcc -o build_web/text_editor.html \
--shell-file data/shell.html \
$flags $incs $wasmflags \
src/text_editor.cpp \
-lm
echo "Wrote build_web/text_editor.html"

76
data/shell.html Normal file
View File

@@ -0,0 +1,76 @@
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover, user-scalable=no">
<title>text_editor</title>
<style>
html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
overflow: hidden;
background: #000;
}
canvas {
display: block;
width: 100vw;
height: 100vh;
outline: none;
border: 0;
background: #000;
}
</style>
</head>
<body>
<canvas id="canvas" oncontextmenu="event.preventDefault()" tabindex="0"></canvas>
<div id="error-box" style="display:none; position:fixed; left:12px; right:12px; bottom:12px; z-index:9999; box-sizing:border-box; max-height:35vh; overflow:auto; padding:10px 12px; border:1px solid #7f1d1d; border-radius:6px; background:rgba(127,29,29,0.94); color:#fff; font:13px/1.35 monospace; white-space:pre-wrap;"></div>
<script>
const errorBox = document.getElementById('error-box');
function showError(message) {
const text = String(message || 'Unknown error');
console.error(text);
errorBox.style.display = 'block';
errorBox.textContent = text;
}
window.addEventListener('error', (event) => {
showError(event.error && event.error.stack ? event.error.stack : event.message);
});
window.addEventListener('unhandledrejection', (event) => {
const reason = event.reason;
showError(reason && reason.stack ? reason.stack : reason);
event.preventDefault();
});
var Module = {
canvas: document.getElementById('canvas'),
print: (text) => console.log(text),
printErr: (text) => showError(text),
onAbort: (what) => showError('Aborted: ' + what),
setStatus: (text) => { if (text) console.log(text); }
};
function resizeCanvasToDisplaySize() {
const canvas = Module.canvas;
const dpr = window.devicePixelRatio || 1;
const w = Math.max(1, Math.floor(window.innerWidth * dpr));
const h = Math.max(1, Math.floor(window.innerHeight * dpr));
if (canvas.width !== w || canvas.height !== h) {
canvas.width = w;
canvas.height = h;
}
}
window.addEventListener('resize', resizeCanvasToDisplaySize);
window.addEventListener('load', () => {
resizeCanvasToDisplaySize();
Module.canvas.focus();
});
</script>
{{{ SCRIPT }}}
</body>
</html>

27
src/basic_alloc.cpp
View File

@@ -331,7 +331,34 @@ API void *BlockArenaAllocatorProc(void *object, int kind, void *p, size_t size)
}
#if OS_WASM
BlockArena ScratchArenas[4];
API void InitScratch() {
for (int i = 0; i < 4; i += 1) {
if (!ScratchArenas[i].blocks) Init(&ScratchArenas[i]);
}
}
API BlockArena *GetScratchEx(BlockArena **conflicts, int conflict_count) {
BlockArena *unoccupied = 0;
for (int i = 0; i < Lengthof(ScratchArenas); i += 1) {
BlockArena *from_pool = &ScratchArenas[i];
unoccupied = from_pool;
for (int conflict_i = 0; conflict_i < conflict_count; conflict_i += 1) {
BlockArena *from_conflict = conflicts[conflict_i];
if (from_pool == from_conflict) {
unoccupied = 0;
break;
}
}
if (unoccupied) {
break;
}
}
// Failed to get free scratch memory, this is a fatal error, this shouldnt happen
Assert(unoccupied);
return unoccupied;
}
#else
thread_local VirtualArena ScratchArenas[4];

46
src/basic_alloc.h
View File

@@ -56,6 +56,7 @@ struct BlockArena {
operator Allocator() { return {BlockArenaAllocatorProc, this}; }
};
API void Init(BlockArena *arena);
API void *PushSize(BlockArena *arena, size_t size);
API void Release(BlockArena *arena);
API void Unwind(BlockArena *arena, U8 *pos);
@@ -98,16 +99,43 @@ API void Release(VirtualArena *arena);
///////////////////////////////
// Scratch
#if OS_WASM
extern BlockArena ScratchArenas[4];
API BlockArena *GetScratchEx(BlockArena **conflicts, int conflict_count);
struct Scratch {
BlockArena arena = {};
Scratch() {}
Scratch(BlockArena *conflict) {}
Scratch(BlockArena *c1, BlockArena *c2) {}
Scratch(Allocator conflict) {}
Scratch(Allocator c1, Allocator c2) {}
~Scratch() { Release(&arena); }
operator BlockArena *() { return &arena; }
operator Allocator() { return arena; }
BlockArena *arena;
U8 *p;
Scratch() {arena = &ScratchArenas[0]; if (!arena->blocks) Init(arena); p = arena->start; arena->refs += 1;}
Scratch(BlockArena *conflict) {
BlockArena *conf[] = {conflict};
arena = GetScratchEx(conf, Lengthof(conf));
if (!arena->blocks) Init(arena);
p = arena->start;
arena->refs += 1;
}
Scratch(BlockArena *c1, BlockArena *c2) {
BlockArena *conf[] = {c1, c2};
arena = GetScratchEx(conf, Lengthof(conf));
if (!arena->blocks) Init(arena);
p = arena->start;
arena->refs += 1;
}
Scratch(Allocator conflict) {
BlockArena *conf[] = {(BlockArena *)conflict.object};
arena = GetScratchEx(conf, Lengthof(conf));
if (!arena->blocks) Init(arena);
p = arena->start;
arena->refs += 1;
}
Scratch(Allocator c1, Allocator c2) {
BlockArena *conf[] = {(BlockArena *)c1.object, (BlockArena *)c2.object};
arena = GetScratchEx(conf, Lengthof(conf));
if (!arena->blocks) Init(arena);
p = arena->start;
arena->refs += 1;
}
~Scratch() { Unwind(arena, p); arena->refs -= 1; }
operator BlockArena *() { return arena; }
operator Allocator() { return *arena; }
private: // @Note: Disable copy constructors, cause its error prone
Scratch(Scratch &arena);
Scratch(Scratch &arena, Scratch &a2);

2
src/view.cpp
View File

@@ -217,7 +217,7 @@ void IndentedNewLine(View *view) {
For(view->carets) {
Int front = GetFront(it);
Int indent = GetLineIndent(buffer, PosToLine(buffer, front));
String string = Format(scratch, "\n%.*s", indent, " ");
String string = Format(scratch, "\n%.*s", (int)indent, " ");
String16 string16 = ToString16(scratch, string);
AddEdit(&edits, it.range, string16);
}