Commit ae52883b authored by jalf's avatar jalf Committed by Solly Ross

Keyboard Handling [1/8]: Parse keysymdef.h to produce Unicode -> keysym mappings table

Add a node.js-based tool (utils/parse.js) to read keysymdef.h and produce a JavaScript file
mapping Unicode code points to keysyms.

Also add the generated table (include/keysymdef.js).
parent 1e570156
This diff is collapsed.
// Utility to parse keysymdef.h to produce mappings from Unicode codepoints to keysyms
"use strict";
var fs = require('fs');
var show_help = process.argv.length === 2;
var use_keynames = false;
var filename;
for (var i = 2; i < process.argv.length; ++i) {
switch (process.argv[i]) {
case "--help":
case "-h":
show_help = true;
break;
case "--debug-names":
case "-d":
use_keynames = true;
break;
case "--file":
case "-f":
default:
filename = process.argv[i];
}
}
if (!filename) {
show_help = true;
console.log("Error: No filename specified\n");
}
if (show_help) {
console.log("Parses a *nix keysymdef.h to generate Unicode code point mappings");
console.log("Usage: node parse.js [options] filename:");
console.log(" -h [ --help ] Produce this help message");
console.log(" -d [ --debug-names ] Preserve keysym names for debugging (Increases file size by ~40KB)");
console.log(" filename The keysymdef.h file to parse");
return;
}
// Set this to false to omit key names from the generated keysymdef.js
// This reduces the file size by around 40kb, but may hinder debugging
var buf = fs.readFileSync(filename);
var str = buf.toString('utf8');
var re = /^\#define XK_([a-zA-Z_0-9]+)\s+0x([0-9a-fA-F]+)\s*(\/\*\s*(.*)\s*\*\/)?\s*$/m;
var arr = str.split('\n');
var keysyms = {};
var codepoints = {};
for (var i = 0; i < arr.length; ++i) {
var result = re.exec(arr[i]);
if (result){
var keyname = result[1];
var keysym = parseInt(result[2], 16);
var remainder = result[3];
keysyms[keysym] = keyname;
var unicodeRes = /U\+([0-9a-fA-F]+)/.exec(remainder);
if (unicodeRes) {
var unicode = parseInt(unicodeRes[1], 16);
if (!codepoints[unicode]){
codepoints[unicode] = keysym;
}
}
else {
console.log("no unicode codepoint found:", arr[i]);
}
}
else {
console.log("line is not a keysym:", arr[i]);
}
}
var out = "// This file describes mappings from Unicode codepoints to the keysym values\n" +
"// (and optionally, key names) expected by the RFB protocol\n" +
"// How this file was generated:\n" +
"// " + process.argv.join(" ") + "\n" +
"var keysyms = (function(){\n" +
" \"use strict\";\n" +
" var keynames = {keysyms};\n" +
" var codepoints = {codepoints};\n" +
"\n" +
" function lookup(k) { return k ? {keysym: k, keyname: keynames ? keynames[k] : k} : undefined; }\n" +
" return {\n" +
" fromUnicode : function(u) { return lookup(codepoints[u]); },\n" +
" lookup : lookup\n" +
" };\n" +
"})();\n";
out = out.replace('{keysyms}', use_keynames ? JSON.stringify(keysyms) : "null");
out = out.replace('{codepoints}', JSON.stringify(codepoints));
fs.writeFileSync("keysymdef.js", out);
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