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"use strict";
/*
* Copyright (c) 2013-2025 Vanessa Freudenberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
Object.extend(Squeak.Primitives.prototype,
'input', {
primitiveClipboardText: function(argCount) {
// There are two ways this primitive is invoked:
// 1: via the DOM keyboard event thandler in squeak.js that intercepts cmd-c/cmd-v,
// reads/writes the system clipboard from/to display.clipboardString
// and then the interpreter calls the primitive
// 2: via the image code e.g. a menu copy/paste item, which calls the primitive
// and we try to read/write the system clipboard directly.
// To support this, squeak.js keeps running the interpreter for 100 ms within
// the DOM event 'mouseup' handler so the code below runs in the click-handler context,
// (otherwise the browser would block access to the clipboard)
if (argCount === 0) { // read from clipboard
// Try to read from system clipboard, which is async if available.
// It will likely fail outside of an event handler.
var clipBoardPromise = null;
if (this.display.readFromSystemClipboard) clipBoardPromise = this.display.readFromSystemClipboard();
if (clipBoardPromise) {
var unfreeze = this.vm.freeze();
clipBoardPromise
.then(() => this.vm.popNandPush(1, this.makeStString(this.display.clipboardString)))
.catch(() => this.vm.popNandPush(1, this.vm.nilObj))
.finally(unfreeze);
} else {
if (typeof(this.display.clipboardString) !== 'string') return false;
this.vm.popNandPush(1, this.makeStString(this.display.clipboardString));
}
} else if (argCount === 1) { // write to clipboard
var stringObj = this.vm.top();
if (stringObj.bytes) {
this.display.clipboardString = stringObj.bytesAsString();
this.display.clipboardStringChanged = true; // means it should be written to system clipboard
if (this.display.writeToSystemClipboard) {
// no need to wait for the promise
this.display.writeToSystemClipboard();
}
}
this.vm.pop();
}
return true;
},
primitiveKeyboardNext: function(argCount) {
return this.popNandPushIfOK(argCount+1, this.ensureSmallInt(this.display.keys.shift()));
},
primitiveKeyboardPeek: function(argCount) {
var length = this.display.keys.length;
return this.popNandPushIfOK(argCount+1, length ? this.ensureSmallInt(this.display.keys[0] || 0) : this.vm.nilObj);
},
primitiveMouseButtons: function(argCount) {
// only used in non-event based (old MVC) images
this.popNandPushIfOK(argCount+1, this.ensureSmallInt(this.display.buttons));
// if the image calls this primitive it means it's done displaying
// we break out of the VM so the browser shows it quickly
this.vm.breakOut();
// if nothing was drawn but the image looks at the buttons rapidly,
// it must be idle.
if (this.display.idle++ > 20)
this.vm.goIdle(); // might switch process, so must be after pop
return true;
},
primitiveMousePoint: function(argCount) {
var x = this.ensureSmallInt(this.display.mouseX),
y = this.ensureSmallInt(this.display.mouseY);
return this.popNandPushIfOK(argCount+1, this.makePointWithXandY(x, y));
},
primitiveInputSemaphore: function(argCount) {
var semaIndex = this.stackInteger(0);
if (!this.success) return false;
this.inputEventSemaIndex = semaIndex;
this.display.signalInputEvent = function() {
this.signalSemaphoreWithIndex(this.inputEventSemaIndex);
}.bind(this);
return this.popNIfOK(argCount);
},
primitiveInputWord: function(argCount) {
// Return an integer indicating the reason for the most recent input interrupt
return this.popNandPushIfOK(1, 0); // noop for now
},
primitiveGetNextEvent: function(argCount) {
this.display.idle++;
var evtBuf = this.stackNonInteger(0);
if (!this.display.getNextEvent) return false;
this.display.getNextEvent(evtBuf.pointers, this.vm.startupTime);
return this.popNIfOK(argCount);
},
});
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