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GUACAMOLE-1820: Simplify unicode interpretation.

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This commit is contained in:
James Muehlner
2023-07-11 18:03:14 +00:00
parent 983393bdb7
commit 1b2c52d496
2 changed files with 9 additions and 38 deletions
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45
guacamole-common-js/src/main/webapp/modules/KeyEventInterpreter.js
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@@ -62,9 +62,9 @@ Guacamole.KeyEventInterpreter = function KeyEventInterpreter(batchSeperation, st
*
* @constructor
* @private
* @param {KEY_DEFINITION|object} [template={}]
* @param {KeyDefinition|object} [template={}]
* The object whose properties should be copied within the new
* KEY_DEFINITION.
* KeyDefinition.
*/
var KeyDefinition = function KeyDefinition(template) {
@@ -278,38 +278,9 @@ Guacamole.KeyEventInterpreter = function KeyEventInterpreter(batchSeperation, st
if (keysym < 0x00 || (keysym > 0xFF && (keysym | 0xFFFF) != 0x0100FFFF))
return null;
var codepoint = keysym & 0xFFFF;
var mask;
var bytes;
// Determine size and initial byte mask
if (codepoint <= 0x007F) {
mask = 0x00;
bytes = 1;
}
else if (codepoint <= 0x7FF) {
mask = 0xC0;
bytes = 2;
}
else {
mask = 0xE0;
bytes = 3;
}
var byteArray = new ArrayBuffer(bytes);
var byteView = new Int8Array(byteArray);
// Add trailing bytes, if any
for (var i = 1; i < bytes; i++) {
byteView[bytes - i] = 0x80 | (codepoint & 0x3F);
codepoint >>= 6;
}
// Set initial byte
byteView[0] = mask | codepoint;
// Convert to UTF8 string
var name = new TextDecoder("utf-8").decode(byteArray);
var codepoint = keysym & 0xFFFF;
var name = String.fromCharCode(codepoint);
// Create and return the definition
return new KeyDefinition({keysym: keysym, name: name, value: name, modifier: false});
@@ -482,7 +453,7 @@ Guacamole.KeyEventInterpreter = function KeyEventInterpreter(batchSeperation, st
}
}
};
/**
* Return the current batch of typed text. Note that the batch may be
@@ -494,8 +465,8 @@ Guacamole.KeyEventInterpreter = function KeyEventInterpreter(batchSeperation, st
*/
this.getCurrentBatch = function getCurrentBatch() {
return currentBatch;
}
}
};
};
/**
* A granular description of an extracted key event, including a human-readable
@@ -576,4 +547,4 @@ Guacamole.KeyEventInterpreter.KeyEventBatch = function KeyEventBatch(events, sim
*/
this.simpleValue = simpleValue || '';
}
};