static/panes/diff.ts - compiler-explorer - Rivoreo Source Code Repositories

 // Copyright (c) 2022, Compiler Explorer Authors
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 //     * Redistributions of source code must retain the above copyright notice,
 //       this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above copyright
 //       notice, this list of conditions and the following disclaimer in the
 //       documentation and/or other materials provided with the distribution.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 // POSSIBILITY OF SUCH DAMAGE.

 import * as monaco from 'monaco-editor';
 import TomSelect from 'tom-select';

 import {ga} from '../analytics';
 import {Hub} from '../hub';
 import {Container} from 'golden-layout';
 import {MonacoPane} from './pane';
 import {MonacoPaneState} from './pane.interfaces';
 import {DiffState, DiffType} from './diff.interfaces';
 import {ResultLine} from '../../types/resultline/resultline.interfaces';
 import {CompilationResult} from '../../types/compilation/compilation.interfaces';
 import {Compiler} from '../../types/compiler.interfaces';

 class DiffStateObject {
     // can be undefined if there are no compilers / executors
     id?: number | string;
     model: monaco.editor.ITextModel;
     compiler: CompilerEntry | null;
     result: CompilationResult | null;
     difftype: DiffType;

     constructor(id: number | string | undefined, model: monaco.editor.ITextModel, difftype: DiffType) {
         this.id = id;
         this.model = model;
         this.compiler = null;
         this.result = null;
         this.difftype = difftype;
     }

     update(id: number | string, compiler, result: CompilationResult) {
         if (this.id !== id) return false;
         this.compiler = compiler;
         this.result = result;
         this.refresh();

         return true;
     }

     refresh() {
         let output: ResultLine[] = [];
         if (this.result) {
             switch (this.difftype) {
                 case DiffType.ASM:
                     output = this.result.asm || [];
                     break;
                 case DiffType.CompilerStdOut:
                     output = this.result.stdout;
                     break;
                 case DiffType.CompilerStdErr:
                     output = this.result.stderr;
                     break;
                 case DiffType.ExecStdOut:
                     if (this.result.execResult) output = this.result.execResult.stdout || [];
                     break;
                 case DiffType.ExecStdErr:
                     if (this.result.execResult) output = this.result.execResult.stderr || [];
                     break;
                 case DiffType.GNAT_ExpandedCode:
                     if (this.result.hasGnatDebugOutput) output = this.result.gnatDebugOutput || [];
                     break;
                 case DiffType.GNAT_Tree:
                     if (this.result.hasGnatDebugTreeOutput) output = this.result.gnatDebugTreeOutput || [];
                     break;
             }
         }
         this.model.setValue(output.map(x => x.text).join('\n'));
     }
 }

 function getItemDisplayTitle(item) {
     if (typeof item.id === 'string') {
         const p = item.id.indexOf('_exec');
         if (p !== -1) {
             return 'Executor #' + item.id.substr(0, p);
         }
     }

     return 'Compiler #' + item.id;
 }

 type CompilerEntry = {
     id: number | string;
     name: string;
     options: unknown;
     editorId: number;
     treeId: number;
     compiler: Compiler;
 };

 type SelectizeType = {
     lhs: TomSelect;
     rhs: TomSelect;
     lhsdifftype: TomSelect;
     rhsdifftype: TomSelect;
 };

 export class Diff extends MonacoPane<monaco.editor.IStandaloneDiffEditor, DiffState> {
     compilers: Record<string | number, CompilerEntry> = {};
     lhs: DiffStateObject;
     rhs: DiffStateObject;
     selectize: SelectizeType = {} as any; // will be filled in by the constructor
     constructor(hub: Hub, container: Container, state: MonacoPaneState & DiffState) {
         super(hub, container, state);

         this.lhs = new DiffStateObject(
             state.lhs,
             monaco.editor.createModel('', 'asm'),
             state.lhsdifftype || DiffType.ASM
         );
         this.rhs = new DiffStateObject(
             state.rhs,
             monaco.editor.createModel('', 'asm'),
             state.rhsdifftype || DiffType.ASM
         );
         this.editor.setModel({original: this.lhs.model, modified: this.rhs.model});

         this.domRoot[0].querySelectorAll('.difftype-picker').forEach(picker => {
             if (!(picker instanceof HTMLSelectElement)) {
                 throw new Error('.difftype-picker is not an HTMLSelectElement');
             }
             const instance = new TomSelect(picker, {
                 sortField: 'name',
                 valueField: 'id',
                 labelField: 'name',
                 searchField: ['name'],
                 options: [
                     {id: DiffType.ASM, name: 'Assembly'},
                     {id: DiffType.CompilerStdOut, name: 'Compiler stdout'},
                     {id: DiffType.CompilerStdErr, name: 'Compiler stderr'},
                     {id: DiffType.ExecStdOut, name: 'Execution stdout'},
                     {id: DiffType.ExecStdErr, name: 'Execution stderr'},
                     {id: DiffType.GNAT_ExpandedCode, name: 'GNAT Expanded Code'},
                     {id: DiffType.GNAT_Tree, name: 'GNAT Tree Code'},
                 ],
                 items: [],
                 render: {
                     option: (item, escape) => {
                         return `<div>${escape(item.name)}</div>`;
                     },
                 },
                 dropdownParent: 'body',
                 plugins: ['input_autogrow'],
                 onChange: value => {
                     if (picker.classList.contains('lhsdifftype')) {
                         this.lhs.difftype = parseInt(value as any as string);
                         this.lhs.refresh();
                     } else {
                         this.rhs.difftype = parseInt(value as any as string);
                         this.rhs.refresh();
                     }
                     this.updateState();
                 },
             });

             if (picker.classList.contains('lhsdifftype')) {
                 this.selectize.lhsdifftype = instance;
             } else {
                 this.selectize.rhsdifftype = instance;
             }
         });

         this.domRoot[0].querySelectorAll('.diff-picker').forEach(picker => {
             if (!(picker instanceof HTMLSelectElement)) {
                 throw new Error('.difftype-picker is not an HTMLSelectElement');
             }
             const instance = new TomSelect(picker, {
                 sortField: 'name',
                 valueField: 'id',
                 labelField: 'name',
                 searchField: ['name'],
                 options: [],
                 items: [],
                 render: {
                     option: function (item, escape) {
                         const origin = item.editorId !== false ? 'Editor #' + item.editorId : 'Tree #' + item.treeId;
                         return (
                             '<div>' +
                             `<span class="compiler">${escape(item.compiler.name)}</span>` +
                             `<span class="options">${escape(item.options)}</span>` +
                             '<ul class="meta">' +
                             `<li class="editor">${escape(origin)}</li>` +
                             `<li class="compilerId">${escape(getItemDisplayTitle(item))}</li>` +
                             '</ul>' +
                             '</div>'
                         );
                     },
                 },
                 dropdownParent: 'body',
                 plugins: ['input_autogrow'],
                 onChange: value => {
                     if (!((value as any as string) in this.compilers)) return;
                     const compiler = this.compilers[value as any as string];
                     if (picker.classList.contains('lhs')) {
                         this.lhs.compiler = compiler;
                         this.lhs.id = compiler.id;
                     } else {
                         this.rhs.compiler = compiler;
                         this.rhs.id = compiler.id;
                     }
                     this.onDiffSelect(compiler.id);
                 },
             });

             if (picker.classList.contains('lhs')) {
                 this.selectize.lhs = instance;
             } else {
                 this.selectize.rhs = instance;
             }
         });

         if (this.lhs.id) this.requestResendResult(this.lhs.id);
         if (this.rhs.id) this.requestResendResult(this.rhs.id);

         this.eventHub.emit('findCompilers');
         this.eventHub.emit('findExecutors');

         this.eventHub.emit('requestTheme');
         this.eventHub.emit('requestSettings');

         this.updateTitle();
         this.updateCompilers();
     }

     override registerOpeningAnalyticsEvent(): void {
         ga.proxy('send', {
             hitType: 'event',
             eventCategory: 'OpenViewPane',
             eventAction: 'Diff',
         });
     }

     override getInitialHTML() {
         return $('#diff').html();
     }

     override createEditor(editorRoot: HTMLElement) {
         return monaco.editor.createDiffEditor(editorRoot, {
             fontFamily: 'Consolas, "Liberation Mono", Courier, monospace',
             scrollBeyondLastLine: true,
             readOnly: true,
         });
     }

     onDiffSelect(id: number | string) {
         this.requestResendResult(id);
         this.updateTitle();
         this.updateState();
     }

     onCompileResult(id: number | string, compiler: Compiler, result: CompilationResult) {
         // both sides must be updated, don't be tempted to rewrite this as
         // var changes = lhs.update() || rhs.update();
         const lhsChanged = this.lhs.update(id, compiler, result);
         const rhsChanged = this.rhs.update(id, compiler, result);
         if (lhsChanged || rhsChanged) {
             this.updateTitle();
         }
     }

     onExecuteResult(id: number, compiler: Compiler, result: CompilationResult) {
         const compileResult: any = Object.assign({}, result.buildResult);
         compileResult.execResult = {
             code: result.code,
             stdout: result.stdout,
             stderr: result.stderr,
         };

         this.onCompileResult(id + '_exec', compiler, compileResult);
     }

     override registerCallbacks() {
         this.eventHub.on('executeResult', this.onExecuteResult, this);
         // @ts-expect-error -- TODO: review the Executor editor/tree id types
         this.eventHub.on('executor', this.onExecutor, this);
         this.eventHub.on('executorClose', this.onExecutorClose, this);
     }

     requestResendResult(id: number | string) {
         if (typeof id === 'string') {
             const p = id.indexOf('_exec');
             if (p !== -1) {
                 const execId = parseInt(id.substr(0, p));
                 this.eventHub.emit('resendExecution', execId);
             }
         } else {
             this.eventHub.emit('resendCompilation', id);
         }
     }

     override onCompiler(
         id: number | string,
         compiler: Compiler | undefined,
         options: unknown,
         editorId: number,
         treeId: number
     ) {
         if (!compiler) return;
         options = options || '';
         let name = compiler.name + ' ' + options;
         // TODO: selectize doesn't play nicely with CSS tricks for truncation; this is the best I can do
         // There's a plugin at: http://www.benbybenjacobs.com/blog/2014/04/09/no-wrap-plugin-for-selectize-dot-js
         // but it doesn't look easy to integrate.
         const maxLength = 30;
         if (name.length > maxLength - 3) name = name.substr(0, maxLength - 3) + '...';
         this.compilers[id] = {
             id: id,
             name: name,
             options: options,
             editorId: editorId,
             treeId: treeId,
             compiler: compiler,
         };
         if (this.lhs.id === undefined) {
             this.lhs.compiler = this.compilers[id];
             this.lhs.id = id;
             this.onDiffSelect(id);
         }
         if (this.rhs.id === undefined) {
             this.rhs.compiler = this.compilers[id];
             this.rhs.id = id;
             this.onDiffSelect(id);
         }
         this.updateCompilers();
     }

     onExecutor(id: number, compiler: Compiler, options: unknown, editorId: number, treeId: number) {
         this.onCompiler(id + '_exec', compiler, options, editorId, treeId);
     }

     override onCompilerClose(id: number | string) {
         delete this.compilers[id];
         this.updateCompilers();
     }

     onExecutorClose(id: number) {
         this.onCompilerClose(id + '_exec');
     }

     override getDefaultPaneName() {
         return 'Diff Viewer';
     }

     override getPaneTag() {
         // this gets called during the super's constructor before lhs/rhs have been initialized
         if ((this.lhs as any) !== undefined && (this.rhs as any) !== undefined) {
             if (this.lhs.compiler && this.rhs.compiler) {
                 return `${this.lhs.compiler.name} vs ${this.rhs.compiler.name}`;
             }
         }
         return '';
     }

     updateCompilersFor(selectize: TomSelect, id: number | string) {
         selectize.clearOptions();
         for (const [_, compiler] of Object.entries(this.compilers)) {
             selectize.addOption(compiler);
         }
         if (id in this.compilers) {
             selectize.setValue(id.toString());
         }
     }

     updateCompilers() {
         if (this.lhs.id) this.updateCompilersFor(this.selectize.lhs, this.lhs.id);
         if (this.rhs.id) this.updateCompilersFor(this.selectize.rhs, this.rhs.id);

         this.selectize.lhsdifftype.setValue((this.lhs.difftype || DiffType.ASM) as any as string);
         this.selectize.rhsdifftype.setValue((this.rhs.difftype || DiffType.ASM) as any as string);
     }

     override getCurrentState() {
         const parent = super.getCurrentState();
         return {
             lhs: this.lhs.id,
             rhs: this.rhs.id,
             lhsdifftype: this.lhs.difftype,
             rhsdifftype: this.rhs.difftype,
             ...parent,
         };
     }

     close() {
         this.eventHub.unsubscribe();
         this.editor.dispose();
     }
 }
	// Copyright (c) 2022, Compiler Explorer Authors
	// All rights reserved.
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// * Redistributions of source code must retain the above copyright notice,
	// this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above copyright
	// notice, this list of conditions and the following disclaimer in the
	// documentation and/or other materials provided with the distribution.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
	// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	// POSSIBILITY OF SUCH DAMAGE.

	import * as monaco from 'monaco-editor';
	import TomSelect from 'tom-select';

	import {ga} from '../analytics';
	import {Hub} from '../hub';
	import {Container} from 'golden-layout';
	import {MonacoPane} from './pane';
	import {MonacoPaneState} from './pane.interfaces';
	import {DiffState, DiffType} from './diff.interfaces';
	import {ResultLine} from '../../types/resultline/resultline.interfaces';
	import {CompilationResult} from '../../types/compilation/compilation.interfaces';
	import {Compiler} from '../../types/compiler.interfaces';

	class DiffStateObject {
	// can be undefined if there are no compilers / executors
	id?: number \| string;
	model: monaco.editor.ITextModel;
	compiler: CompilerEntry \| null;
	result: CompilationResult \| null;
	difftype: DiffType;

	constructor(id: number \| string \| undefined, model: monaco.editor.ITextModel, difftype: DiffType) {
	this.id = id;
	this.model = model;
	this.compiler = null;
	this.result = null;
	this.difftype = difftype;
	}

	update(id: number \| string, compiler, result: CompilationResult) {
	if (this.id !== id) return false;
	this.compiler = compiler;
	this.result = result;
	this.refresh();

	return true;
	}

	refresh() {
	let output: ResultLine[] = [];
	if (this.result) {
	switch (this.difftype) {
	case DiffType.ASM:
	output = this.result.asm \|\| [];
	break;
	case DiffType.CompilerStdOut:
	output = this.result.stdout;
	break;
	case DiffType.CompilerStdErr:
	output = this.result.stderr;
	break;
	case DiffType.ExecStdOut:
	if (this.result.execResult) output = this.result.execResult.stdout \|\| [];
	break;
	case DiffType.ExecStdErr:
	if (this.result.execResult) output = this.result.execResult.stderr \|\| [];
	break;
	case DiffType.GNAT_ExpandedCode:
	if (this.result.hasGnatDebugOutput) output = this.result.gnatDebugOutput \|\| [];
	break;
	case DiffType.GNAT_Tree:
	if (this.result.hasGnatDebugTreeOutput) output = this.result.gnatDebugTreeOutput \|\| [];
	break;
	}
	}
	this.model.setValue(output.map(x => x.text).join('\n'));
	}
	}

	function getItemDisplayTitle(item) {
	if (typeof item.id === 'string') {
	const p = item.id.indexOf('_exec');
	if (p !== -1) {
	return 'Executor #' + item.id.substr(0, p);
	}
	}

	return 'Compiler #' + item.id;
	}

	type CompilerEntry = {
	id: number \| string;
	name: string;
	options: unknown;
	editorId: number;
	treeId: number;
	compiler: Compiler;
	};

	type SelectizeType = {
	lhs: TomSelect;
	rhs: TomSelect;
	lhsdifftype: TomSelect;
	rhsdifftype: TomSelect;
	};

	export class Diff extends MonacoPane<monaco.editor.IStandaloneDiffEditor, DiffState> {
	compilers: Record<string \| number, CompilerEntry> = {};
	lhs: DiffStateObject;
	rhs: DiffStateObject;
	selectize: SelectizeType = {} as any; // will be filled in by the constructor
	constructor(hub: Hub, container: Container, state: MonacoPaneState & DiffState) {
	super(hub, container, state);

	this.lhs = new DiffStateObject(
	state.lhs,
	monaco.editor.createModel('', 'asm'),
	state.lhsdifftype \|\| DiffType.ASM
	);
	this.rhs = new DiffStateObject(
	state.rhs,
	monaco.editor.createModel('', 'asm'),
	state.rhsdifftype \|\| DiffType.ASM
	);
	this.editor.setModel({original: this.lhs.model, modified: this.rhs.model});

	this.domRoot[0].querySelectorAll('.difftype-picker').forEach(picker => {
	if (!(picker instanceof HTMLSelectElement)) {
	throw new Error('.difftype-picker is not an HTMLSelectElement');
	}
	const instance = new TomSelect(picker, {
	sortField: 'name',
	valueField: 'id',
	labelField: 'name',
	searchField: ['name'],
	options: [
	{id: DiffType.ASM, name: 'Assembly'},
	{id: DiffType.CompilerStdOut, name: 'Compiler stdout'},
	{id: DiffType.CompilerStdErr, name: 'Compiler stderr'},
	{id: DiffType.ExecStdOut, name: 'Execution stdout'},
	{id: DiffType.ExecStdErr, name: 'Execution stderr'},
	{id: DiffType.GNAT_ExpandedCode, name: 'GNAT Expanded Code'},
	{id: DiffType.GNAT_Tree, name: 'GNAT Tree Code'},
	],
	items: [],
	render: {
	option: (item, escape) => {
	return `<div>${escape(item.name)}</div>`;
	},
	},
	dropdownParent: 'body',
	plugins: ['input_autogrow'],
	onChange: value => {
	if (picker.classList.contains('lhsdifftype')) {
	this.lhs.difftype = parseInt(value as any as string);
	this.lhs.refresh();
	} else {
	this.rhs.difftype = parseInt(value as any as string);
	this.rhs.refresh();
	}
	this.updateState();
	},
	});

	if (picker.classList.contains('lhsdifftype')) {
	this.selectize.lhsdifftype = instance;
	} else {
	this.selectize.rhsdifftype = instance;
	}
	});

	this.domRoot[0].querySelectorAll('.diff-picker').forEach(picker => {
	if (!(picker instanceof HTMLSelectElement)) {
	throw new Error('.difftype-picker is not an HTMLSelectElement');
	}
	const instance = new TomSelect(picker, {
	sortField: 'name',
	valueField: 'id',
	labelField: 'name',
	searchField: ['name'],
	options: [],
	items: [],
	render: {
	option: function (item, escape) {
	const origin = item.editorId !== false ? 'Editor #' + item.editorId : 'Tree #' + item.treeId;
	return (
	'<div>' +
	`<span class="compiler">${escape(item.compiler.name)}</span>` +
	`<span class="options">${escape(item.options)}</span>` +
	'<ul class="meta">' +
	`<li class="editor">${escape(origin)}</li>` +
	`<li class="compilerId">${escape(getItemDisplayTitle(item))}</li>` +
	'</ul>' +
	'</div>'
	);
	},
	},
	dropdownParent: 'body',
	plugins: ['input_autogrow'],
	onChange: value => {
	if (!((value as any as string) in this.compilers)) return;
	const compiler = this.compilers[value as any as string];
	if (picker.classList.contains('lhs')) {
	this.lhs.compiler = compiler;
	this.lhs.id = compiler.id;
	} else {
	this.rhs.compiler = compiler;
	this.rhs.id = compiler.id;
	}
	this.onDiffSelect(compiler.id);
	},
	});

	if (picker.classList.contains('lhs')) {
	this.selectize.lhs = instance;
	} else {
	this.selectize.rhs = instance;
	}
	});

	if (this.lhs.id) this.requestResendResult(this.lhs.id);
	if (this.rhs.id) this.requestResendResult(this.rhs.id);

	this.eventHub.emit('findCompilers');
	this.eventHub.emit('findExecutors');

	this.eventHub.emit('requestTheme');
	this.eventHub.emit('requestSettings');

	this.updateTitle();
	this.updateCompilers();
	}

	override registerOpeningAnalyticsEvent(): void {
	ga.proxy('send', {
	hitType: 'event',
	eventCategory: 'OpenViewPane',
	eventAction: 'Diff',
	});
	}

	override getInitialHTML() {
	return $('#diff').html();
	}

	override createEditor(editorRoot: HTMLElement) {
	return monaco.editor.createDiffEditor(editorRoot, {
	fontFamily: 'Consolas, "Liberation Mono", Courier, monospace',
	scrollBeyondLastLine: true,
	readOnly: true,
	});
	}

	onDiffSelect(id: number \| string) {
	this.requestResendResult(id);
	this.updateTitle();
	this.updateState();
	}

	onCompileResult(id: number \| string, compiler: Compiler, result: CompilationResult) {
	// both sides must be updated, don't be tempted to rewrite this as
	// var changes = lhs.update() \|\| rhs.update();
	const lhsChanged = this.lhs.update(id, compiler, result);
	const rhsChanged = this.rhs.update(id, compiler, result);
	if (lhsChanged \|\| rhsChanged) {
	this.updateTitle();
	}
	}

	onExecuteResult(id: number, compiler: Compiler, result: CompilationResult) {
	const compileResult: any = Object.assign({}, result.buildResult);
	compileResult.execResult = {
	code: result.code,
	stdout: result.stdout,
	stderr: result.stderr,
	};

	this.onCompileResult(id + '_exec', compiler, compileResult);
	}

	override registerCallbacks() {
	this.eventHub.on('executeResult', this.onExecuteResult, this);
	// @ts-expect-error -- TODO: review the Executor editor/tree id types
	this.eventHub.on('executor', this.onExecutor, this);
	this.eventHub.on('executorClose', this.onExecutorClose, this);
	}

	requestResendResult(id: number \| string) {
	if (typeof id === 'string') {
	const p = id.indexOf('_exec');
	if (p !== -1) {
	const execId = parseInt(id.substr(0, p));
	this.eventHub.emit('resendExecution', execId);
	}
	} else {
	this.eventHub.emit('resendCompilation', id);
	}
	}

	override onCompiler(
	id: number \| string,
	compiler: Compiler \| undefined,
	options: unknown,
	editorId: number,
	treeId: number
	) {
	if (!compiler) return;
	options = options \|\| '';
	let name = compiler.name + ' ' + options;
	// TODO: selectize doesn't play nicely with CSS tricks for truncation; this is the best I can do
	// There's a plugin at: http://www.benbybenjacobs.com/blog/2014/04/09/no-wrap-plugin-for-selectize-dot-js
	// but it doesn't look easy to integrate.
	const maxLength = 30;
	if (name.length > maxLength - 3) name = name.substr(0, maxLength - 3) + '...';
	this.compilers[id] = {
	id: id,
	name: name,
	options: options,
	editorId: editorId,
	treeId: treeId,
	compiler: compiler,
	};
	if (this.lhs.id === undefined) {
	this.lhs.compiler = this.compilers[id];
	this.lhs.id = id;
	this.onDiffSelect(id);
	}
	if (this.rhs.id === undefined) {
	this.rhs.compiler = this.compilers[id];
	this.rhs.id = id;
	this.onDiffSelect(id);
	}
	this.updateCompilers();
	}

	onExecutor(id: number, compiler: Compiler, options: unknown, editorId: number, treeId: number) {
	this.onCompiler(id + '_exec', compiler, options, editorId, treeId);
	}

	override onCompilerClose(id: number \| string) {
	delete this.compilers[id];
	this.updateCompilers();
	}

	onExecutorClose(id: number) {
	this.onCompilerClose(id + '_exec');
	}

	override getDefaultPaneName() {
	return 'Diff Viewer';
	}

	override getPaneTag() {
	// this gets called during the super's constructor before lhs/rhs have been initialized
	if ((this.lhs as any) !== undefined && (this.rhs as any) !== undefined) {
	if (this.lhs.compiler && this.rhs.compiler) {
	return `${this.lhs.compiler.name} vs ${this.rhs.compiler.name}`;
	}
	}
	return '';
	}

	updateCompilersFor(selectize: TomSelect, id: number \| string) {
	selectize.clearOptions();
	for (const [_, compiler] of Object.entries(this.compilers)) {
	selectize.addOption(compiler);
	}
	if (id in this.compilers) {
	selectize.setValue(id.toString());
	}
	}

	updateCompilers() {
	if (this.lhs.id) this.updateCompilersFor(this.selectize.lhs, this.lhs.id);
	if (this.rhs.id) this.updateCompilersFor(this.selectize.rhs, this.rhs.id);

	this.selectize.lhsdifftype.setValue((this.lhs.difftype \|\| DiffType.ASM) as any as string);
	this.selectize.rhsdifftype.setValue((this.rhs.difftype \|\| DiffType.ASM) as any as string);
	}

	override getCurrentState() {
	const parent = super.getCurrentState();
	return {
	lhs: this.lhs.id,
	rhs: this.rhs.id,
	lhsdifftype: this.lhs.difftype,
	rhsdifftype: this.rhs.difftype,
	...parent,
	};
	}

	close() {
	this.eventHub.unsubscribe();
	this.editor.dispose();
	}
	}