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

 // Copyright (c) 2021, 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 {MultifileFile, MultifileService, MultifileServiceState} from '../multifile-service';
 import {LineColouring} from '../line-colouring';
 import * as utils from '../utils';
 import {Settings, SiteSettings} from '../settings';
 import {PaneRenaming} from '../widgets/pane-renaming';
 import {Hub} from '../hub';
 import {EventHub} from '../event-hub';
 import {Alert} from '../alert';
 import Components from '../components';
 import {ga} from '../analytics';
 import TomSelect from 'tom-select';
 import {Toggles} from '../widgets/toggles';
 import {options} from '../options';
 import {saveAs} from 'file-saver';
 import {Container} from 'golden-layout';
 import _ from 'underscore';

 const languages = options.languages;

 export interface TreeState extends MultifileServiceState {
     id: number;
     cmakeArgs: string;
     customOutputFilename: string;
 }

 export class Tree {
     public readonly id: number;
     private container: Container;
     private domRoot: JQuery;
     private readonly hub: Hub;
     private eventHub: EventHub;
     private readonly settings: SiteSettings;
     private httpRoot: string;
     private readonly alertSystem: Alert;
     private root: JQuery;
     private rowTemplate: JQuery;
     private namedItems: JQuery;
     private unnamedItems: JQuery;
     private langKeys: string[];
     private cmakeArgsInput: JQuery;
     private customOutputFilenameInput: JQuery;
     public multifileService: MultifileService;
     private lineColouring: LineColouring;
     private readonly ourCompilers: Record<number, boolean>;
     private readonly busyCompilers: Record<number, boolean>;
     private readonly asmByCompiler: Record<number, any>;
     private selectize: TomSelect;
     private languageBtn: JQuery;
     private toggleCMakeButton: Toggles;
     private debouncedEmitChange: () => void = () => {};
     private hideable: JQuery;
     private readonly topBar: JQuery;
     private paneName: string;
     private paneRenaming: PaneRenaming;

     constructor(hub: Hub, container: Container, state: TreeState) {
         this.id = state.id || hub.nextTreeId();
         this.container = container;
         this.domRoot = container.getElement();
         this.domRoot.html($('#tree').html());
         this.hub = hub;
         this.eventHub = hub.createEventHub();
         this.settings = Settings.getStoredSettings();

         this.httpRoot = window.httpRoot;

         this.alertSystem = new Alert();
         this.alertSystem.prefixMessage = 'Tree #' + this.id;

         this.root = this.domRoot.find('.tree');
         this.rowTemplate = $('#tree-editor-tpl');
         this.namedItems = this.domRoot.find('.named-editors');
         this.unnamedItems = this.domRoot.find('.unnamed-editors');
         this.hideable = this.domRoot.find('.hideable');
         this.topBar = this.domRoot.find('.top-bar.mainbar');

         this.langKeys = Object.keys(languages);

         this.cmakeArgsInput = this.domRoot.find('.cmake-arguments');
         this.customOutputFilenameInput = this.domRoot.find('.cmake-customOutputFilename');

         const usableLanguages = Object.values(languages).filter(language => {
             return hub.compilerService.compilersByLang[language.id];
         });

         if (!state.compilerLanguageId) {
             state.compilerLanguageId = this.settings.defaultLanguage ?? 'c++';
         }

         this.multifileService = new MultifileService(this.hub, this.alertSystem, state);
         this.lineColouring = new LineColouring(this.multifileService);
         this.ourCompilers = {};
         this.busyCompilers = {};
         this.asmByCompiler = {};

         this.paneRenaming = new PaneRenaming(this, state);

         this.initInputs(state);
         this.initButtons(state);
         this.initCallbacks();
         this.onSettingsChange(this.settings);

         this.selectize = new TomSelect(this.languageBtn[0] as HTMLInputElement, {
             sortField: 'name',
             valueField: 'id',
             labelField: 'name',
             searchField: ['name'],
             options: usableLanguages,
             items: [this.multifileService.getLanguageId()],
             dropdownParent: 'body',
             plugins: ['input_autogrow'],
             onChange: (val: any) => {
                 this.onLanguageChange(val as string);
             },
         });

         this.onLanguageChange(this.multifileService.getLanguageId());

         ga.proxy('send', {
             hitType: 'event',
             eventCategory: 'OpenViewPane',
             eventAction: 'Tree',
         });

         this.refresh();
         this.eventHub.emit('findEditors');
     }

     private initInputs(state: TreeState) {
         if (state.cmakeArgs) {
             this.cmakeArgsInput.val(state.cmakeArgs);
         }

         if (state.customOutputFilename) {
             this.customOutputFilenameInput.val(state.customOutputFilename);
         }
     }

     private getCmakeArgs(): string {
         return this.cmakeArgsInput.val() as string;
     }

     private getCustomOutputFilename(): string {
         return _.escape(this.customOutputFilenameInput.val() as string);
     }

     public currentState(): TreeState {
         const state = {
             id: this.id,
             cmakeArgs: this.getCmakeArgs(),
             customOutputFilename: this.getCustomOutputFilename(),
             ...this.multifileService.getState(),
         };
         this.paneRenaming.addState(state);
         return state;
     }

     private updateState() {
         const state = this.currentState();
         this.container.setState(state);

         this.updateButtons(state);
     }

     private initCallbacks() {
         this.container.on('resize', this.resize, this);
         this.container.on('shown', this.resize, this);
         this.container.on('open', () => {
             this.eventHub.emit('treeOpen', this.id);
         });
         this.container.on('destroy', this.close, this);

         this.paneRenaming.on('renamePane', this.updateState.bind(this));

         this.eventHub.on('editorOpen', this.onEditorOpen, this);
         this.eventHub.on('editorClose', this.onEditorClose, this);
         this.eventHub.on('compilerOpen', this.onCompilerOpen, this);
         this.eventHub.on('compilerClose', this.onCompilerClose, this);

         this.eventHub.on('compileResult', this.onCompileResponse, this);

         this.toggleCMakeButton.on('change', this.onToggleCMakeChange.bind(this));

         this.cmakeArgsInput.on('change', this.updateCMakeArgs.bind(this));
         this.customOutputFilenameInput.on('change', this.updateCustomOutputFilename.bind(this));
     }

     private updateCMakeArgs() {
         this.updateState();

         this.debouncedEmitChange();
     }

     private updateCustomOutputFilename() {
         this.updateState();

         this.debouncedEmitChange();
     }

     private onToggleCMakeChange() {
         const isOn = this.toggleCMakeButton.get().isCMakeProject;
         this.multifileService.setAsCMakeProject(isOn);

         this.domRoot.find('.cmake-project').prop('title', '[' + (isOn ? 'ON' : 'OFF') + '] CMake project');
         this.updateState();
     }

     private onLanguageChange(newLangId: string) {
         if (newLangId in languages) {
             this.multifileService.setLanguageId(newLangId);
             this.eventHub.emit('languageChange', false, newLangId, this.id);
         }

         this.toggleCMakeButton.enableToggle('isCMakeProject', this.multifileService.isCompatibleWithCMake());

         this.refresh();
     }

     private sendCompilerChangesToEditor(compilerId: number) {
         this.multifileService.forEachOpenFile((file: MultifileFile) => {
             if (file.isIncluded) {
                 this.eventHub.emit('treeCompilerEditorIncludeChange', this.id, file.editorId, compilerId);
             } else {
                 this.eventHub.emit('treeCompilerEditorExcludeChange', this.id, file.editorId, compilerId);
             }
         });

         this.eventHub.emit('resendCompilation', compilerId);
     }

     private sendCompileRequests() {
         this.eventHub.emit('requestCompilation', false, this.id);
     }

     private sendChangesToAllEditors() {
         for (const compilerId in this.ourCompilers) {
             this.sendCompilerChangesToEditor(parseInt(compilerId));
         }
     }

     private onCompilerOpen(compilerId: number, unused, treeId: number | boolean) {
         if (treeId === this.id) {
             this.ourCompilers[compilerId] = true;
             this.sendCompilerChangesToEditor(compilerId);
         }
     }

     private onCompilerClose(compilerId: number, treeId: number | boolean) {
         if (treeId === this.id) {
             delete this.ourCompilers[compilerId];
         }
     }

     private onEditorOpen(editorId: number) {
         const file = this.multifileService.getFileByEditorId(editorId);
         if (file) return;

         this.multifileService.addFileForEditorId(editorId);
         this.refresh();
         this.sendChangesToAllEditors();
     }

     private onEditorClose(editorId: number) {
         const file = this.multifileService.getFileByEditorId(editorId);

         if (file) {
             file.isOpen = false;
             const editor = this.hub.getEditorById(editorId);
             file.langId = editor.currentLanguage.id;
             file.content = editor.getSource();
             file.editorId = -1;
         }

         this.refresh();
     }

     private removeFile(fileId: number) {
         const file = this.multifileService.removeFileByFileId(fileId);
         if (file) {
             if (file.isOpen) {
                 const editor = this.hub.getEditorById(file.editorId);
                 if (editor) {
                     editor.container.close();
                 }
             }
         }

         this.refresh();
     }

     private addRowToTreelist(file: MultifileFile) {
         const item = $(this.rowTemplate.children()[0].cloneNode(true));
         const stageButton = item.find('.stage-file');
         const unstageButton = item.find('.unstage-file');
         const renameButton = item.find('.rename-file');
         const deleteButton = item.find('.delete-file');

         item.data('fileId', file.fileId);
         if (file.filename) {
             item.find('.filename').text(file.filename);
         } else if (file.editorId > 0) {
             const editor = this.hub.getEditorById(file.editorId);
             if (editor) {
                 item.find('.filename').text(editor.getPaneName());
             } else {
                 // wait for editor to appear first
                 return;
             }
         } else {
             item.find('.filename').text('Unknown file');
         }

         item.on('click', e => {
             const fileId = $(e.currentTarget).data('fileId');
             this.editFile(fileId);
         });

         renameButton.on('click', async e => {
             const fileId = $(e.currentTarget).parent('li').data('fileId');
             await this.multifileService.renameFile(fileId);
             this.refresh();
         });

         deleteButton.on('click', e => {
             const fileId = $(e.currentTarget).parent('li').data('fileId');
             const file = this.multifileService.getFileByFileId(fileId);
             if (file) {
                 this.alertSystem.ask(
                     'Delete file',
                     `Are you sure you want to delete ${file.filename ? _.escape(file.filename) : 'this file'}?`,
                     {
                         yes: () => {
                             this.removeFile(fileId);
                         },
                         yesClass: 'btn-danger',
                         yesHtml: 'Delete',
                         noClass: 'btn-primary',
                         noHtml: 'Cancel',
                     }
                 );
             }
         });

         stageButton.on('click', async e => {
             const fileId = $(e.currentTarget).parent('li').data('fileId');
             await this.moveToInclude(fileId);
         });
         unstageButton.on('click', async e => {
             const fileId = $(e.currentTarget).parent('li').data('fileId');
             await this.moveToExclude(fileId);
         });
         stageButton.toggle(!file.isIncluded);
         unstageButton.toggle(file.isIncluded);
         // @ts-ignore TODO type mismatch
         (file.isIncluded ? this.namedItems : this.unnamedItems).append(item);
     }

     private refresh() {
         this.updateState();

         this.namedItems.html('');
         this.unnamedItems.html('');

         this.multifileService.forEachFile((file: MultifileFile) => this.addRowToTreelist(file));
     }

     private editFile(fileId: number) {
         const file = this.multifileService.getFileByFileId(fileId);
         if (file) {
             if (!file.isOpen) {
                 const dragConfig = this.getConfigForNewEditor(file);
                 file.isOpen = true;

                 this.hub.addInEditorStackIfPossible(dragConfig);
             } else {
                 const editor = this.hub.getEditorById(file.editorId);
                 this.hub.activateTabForContainer(editor.container);
             }

             this.sendChangesToAllEditors();
         }
     }

     private async moveToInclude(fileId: number) {
         await this.multifileService.includeByFileId(fileId);

         this.refresh();
         this.sendChangesToAllEditors();
     }

     private async moveToExclude(fileId: number) {
         await this.multifileService.excludeByFileId(fileId);
         this.refresh();
         this.sendChangesToAllEditors();
     }

     private bindClickToOpenPane(dragSource, dragConfig) {
         (this.container.layoutManager.createDragSource(dragSource, dragConfig.bind(this)) as any)._dragListener.on(
             'dragStart',
             () => {
                 this.domRoot.find('.add-pane').dropdown('toggle');
             }
         );

         dragSource.on('click', () => {
             this.hub.addInEditorStackIfPossible(dragConfig.bind(this));
         });
     }

     private getConfigForNewCompiler() {
         return Components.getCompilerForTree(this.id, this.currentState().compilerLanguageId);
     }

     private getConfigForNewExecutor() {
         return Components.getExecutorForTree(this.id, this.currentState().compilerLanguageId);
     }

     private getConfigForNewEditor(file: MultifileFile | undefined) {
         let editor;
         const editorId = this.hub.nextEditorId();

         if (file) {
             file.editorId = editorId;
             editor = Components.getEditor(editorId, file.langId);

             editor.componentState.source = file.content;
             if (file.filename) {
                 editor.componentState.filename = file.filename;
             }
         } else {
             editor = Components.getEditor(editorId, this.multifileService.getLanguageId());
         }

         return editor;
     }

     private static getFormattedDateTime() {
         const d = new Date();
         const t = x => x.slice(-2);
         // Hopefully some day we can use the temporal api to make this less of a pain
         return (
             `${d.getFullYear()} ${t('0' + (d.getMonth() + 1))} ${t('0' + d.getDate())}` +
             `${t('0' + d.getHours())} ${t('0' + d.getMinutes())} ${t('0' + d.getSeconds())}`
         );
     }

     private static triggerSaveAs(blob) {
         const dt = Tree.getFormattedDateTime();
         saveAs(blob, `project-${dt}.zip`);
     }

     private initButtons(state: TreeState) {
         const addCompilerButton = this.domRoot.find('.add-compiler');
         const addExecutorButton = this.domRoot.find('.add-executor');
         const addEditorButton = this.domRoot.find('.add-editor');
         const saveProjectButton = this.domRoot.find('.save-project-to-file');

         saveProjectButton.on('click', async () => {
             await this.multifileService.saveProjectToZipfile(Tree.triggerSaveAs.bind(this));
         });

         const loadProjectFromFile = this.domRoot.find('.load-project-from-file') as JQuery<HTMLInputElement>;
         loadProjectFromFile.on('change', async e => {
             const files = e.target.files;
             if (files && files.length > 0) {
                 this.multifileService.forEachFile((file: MultifileFile) => {
                     this.removeFile(file.fileId);
                 });

                 await this.multifileService.loadProjectFromFile(files[0], (file: MultifileFile) => {
                     this.refresh();
                     if (file.filename === 'CMakeLists.txt') {
                         // todo: find a way to toggle on CMake checkbox...
                         this.editFile(file.fileId);
                     }
                 });
             }
         });

         this.bindClickToOpenPane(addCompilerButton, this.getConfigForNewCompiler);
         this.bindClickToOpenPane(addExecutorButton, this.getConfigForNewExecutor);
         this.bindClickToOpenPane(addEditorButton, this.getConfigForNewEditor);

         this.languageBtn = this.domRoot.find('.change-language');
         if (!(this.languageBtn[0] instanceof HTMLSelectElement)) {
             throw new Error('.language-button is not an HTMLSelectElement');
         }
         if (this.langKeys.length <= 1) {
             this.languageBtn.prop('disabled', true);
         }

         this.toggleCMakeButton = new Toggles(
             this.domRoot.find('.options'),
             state as unknown as Record<string, boolean>
         );
     }

     private numberUsedLines() {
         if (_.any(this.busyCompilers)) return;

         if (!this.settings.colouriseAsm) {
             this.updateColoursNone();
             return;
         }

         this.lineColouring.clear();

         for (const [compilerId, asm] of Object.entries(this.asmByCompiler)) {
             if (asm) {
                 this.lineColouring.addFromAssembly(parseInt(compilerId), asm);
             }
         }

         this.lineColouring.calculate();

         this.updateColours();
     }

     private updateColours() {
         for (const compilerId in this.ourCompilers) {
             const id: number = parseInt(compilerId);
             this.eventHub.emit(
                 'coloursForCompiler',
                 id,
                 this.lineColouring.getColoursForCompiler(id),
                 this.settings.colourScheme
             );
         }

         this.multifileService.forEachOpenFile((file: MultifileFile) => {
             this.eventHub.emit(
                 'coloursForEditor',
                 file.editorId,
                 this.lineColouring.getColoursForEditor(file.editorId),
                 this.settings.colourScheme
             );
         });
     }

     private updateColoursNone() {
         for (const compilerId in this.ourCompilers) {
             this.eventHub.emit('coloursForCompiler', parseInt(compilerId), {}, this.settings.colourScheme);
         }

         this.multifileService.forEachOpenFile((file: MultifileFile) => {
             this.eventHub.emit('coloursForEditor', file.editorId, {}, this.settings.colourScheme);
         });
     }

     private onCompileResponse(compilerId: number, compiler, result) {
         if (!this.ourCompilers[compilerId]) return;

         this.busyCompilers[compilerId] = false;

         // todo: parse errors and warnings and relate them to lines in the code
         // note: requires info about the filename, do we currently have that?

         // eslint-disable-next-line max-len
         // {"text":"/tmp/compiler-explorer-compiler2021428-7126-95g4xc.zfo8p/example.cpp:4:21: error: expected ‘;’ before ‘}’ token"}

         if (result.result && result.result.asm) {
             this.asmByCompiler[compilerId] = result.result.asm;
         } else {
             this.asmByCompiler[compilerId] = result.asm;
         }

         this.numberUsedLines();
     }

     private updateButtons(state: TreeState) {
         if (state.isCMakeProject) {
             this.cmakeArgsInput.parent().removeClass('d-none');
             this.customOutputFilenameInput.parent().removeClass('d-none');
         } else {
             this.cmakeArgsInput.parent().addClass('d-none');
             this.customOutputFilenameInput.parent().addClass('d-none');
         }
     }

     private resize() {
         utils.updateAndCalcTopBarHeight(this.domRoot, this.topBar, this.hideable);

         const mainbarHeight = this.topBar.outerHeight(true) as number;
         const argsHeight = this.domRoot.find('.panel-args').outerHeight(true) as number;
         const outputfileHeight = this.domRoot.find('.panel-outputfile').outerHeight(true) as number;
         const innerHeight = this.domRoot.innerHeight() as number;

         this.root.height(innerHeight - mainbarHeight - argsHeight - outputfileHeight);
     }

     private onSettingsChange(newSettings) {
         this.debouncedEmitChange = _.debounce(() => {
             this.sendCompileRequests();
         }, newSettings.delayAfterChange);
     }

     private getPaneName() {
         return `Tree #${this.id}`;
     }

     private updateTitle() {
         const name = this.paneName ? this.paneName : this.getPaneName();
         this.container.setTitle(_.escape(name));
     }

     private close() {
         this.eventHub.unsubscribe();
         this.eventHub.emit('treeClose', this.id);
         this.hub.removeTree(this.id);
         $('#add-tree').prop('disabled', false);
     }
 }
	// Copyright (c) 2021, 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 {MultifileFile, MultifileService, MultifileServiceState} from '../multifile-service';
	import {LineColouring} from '../line-colouring';
	import * as utils from '../utils';
	import {Settings, SiteSettings} from '../settings';
	import {PaneRenaming} from '../widgets/pane-renaming';
	import {Hub} from '../hub';
	import {EventHub} from '../event-hub';
	import {Alert} from '../alert';
	import Components from '../components';
	import {ga} from '../analytics';
	import TomSelect from 'tom-select';
	import {Toggles} from '../widgets/toggles';
	import {options} from '../options';
	import {saveAs} from 'file-saver';
	import {Container} from 'golden-layout';
	import _ from 'underscore';

	const languages = options.languages;

	export interface TreeState extends MultifileServiceState {
	id: number;
	cmakeArgs: string;
	customOutputFilename: string;
	}

	export class Tree {
	public readonly id: number;
	private container: Container;
	private domRoot: JQuery;
	private readonly hub: Hub;
	private eventHub: EventHub;
	private readonly settings: SiteSettings;
	private httpRoot: string;
	private readonly alertSystem: Alert;
	private root: JQuery;
	private rowTemplate: JQuery;
	private namedItems: JQuery;
	private unnamedItems: JQuery;
	private langKeys: string[];
	private cmakeArgsInput: JQuery;
	private customOutputFilenameInput: JQuery;
	public multifileService: MultifileService;
	private lineColouring: LineColouring;
	private readonly ourCompilers: Record<number, boolean>;
	private readonly busyCompilers: Record<number, boolean>;
	private readonly asmByCompiler: Record<number, any>;
	private selectize: TomSelect;
	private languageBtn: JQuery;
	private toggleCMakeButton: Toggles;
	private debouncedEmitChange: () => void = () => {};
	private hideable: JQuery;
	private readonly topBar: JQuery;
	private paneName: string;
	private paneRenaming: PaneRenaming;

	constructor(hub: Hub, container: Container, state: TreeState) {
	this.id = state.id \|\| hub.nextTreeId();
	this.container = container;
	this.domRoot = container.getElement();
	this.domRoot.html($('#tree').html());
	this.hub = hub;
	this.eventHub = hub.createEventHub();
	this.settings = Settings.getStoredSettings();

	this.httpRoot = window.httpRoot;

	this.alertSystem = new Alert();
	this.alertSystem.prefixMessage = 'Tree #' + this.id;

	this.root = this.domRoot.find('.tree');
	this.rowTemplate = $('#tree-editor-tpl');
	this.namedItems = this.domRoot.find('.named-editors');
	this.unnamedItems = this.domRoot.find('.unnamed-editors');
	this.hideable = this.domRoot.find('.hideable');
	this.topBar = this.domRoot.find('.top-bar.mainbar');

	this.langKeys = Object.keys(languages);

	this.cmakeArgsInput = this.domRoot.find('.cmake-arguments');
	this.customOutputFilenameInput = this.domRoot.find('.cmake-customOutputFilename');

	const usableLanguages = Object.values(languages).filter(language => {
	return hub.compilerService.compilersByLang[language.id];
	});

	if (!state.compilerLanguageId) {
	state.compilerLanguageId = this.settings.defaultLanguage ?? 'c++';
	}

	this.multifileService = new MultifileService(this.hub, this.alertSystem, state);
	this.lineColouring = new LineColouring(this.multifileService);
	this.ourCompilers = {};
	this.busyCompilers = {};
	this.asmByCompiler = {};

	this.paneRenaming = new PaneRenaming(this, state);

	this.initInputs(state);
	this.initButtons(state);
	this.initCallbacks();
	this.onSettingsChange(this.settings);

	this.selectize = new TomSelect(this.languageBtn[0] as HTMLInputElement, {
	sortField: 'name',
	valueField: 'id',
	labelField: 'name',
	searchField: ['name'],
	options: usableLanguages,
	items: [this.multifileService.getLanguageId()],
	dropdownParent: 'body',
	plugins: ['input_autogrow'],
	onChange: (val: any) => {
	this.onLanguageChange(val as string);
	},
	});

	this.onLanguageChange(this.multifileService.getLanguageId());

	ga.proxy('send', {
	hitType: 'event',
	eventCategory: 'OpenViewPane',
	eventAction: 'Tree',
	});

	this.refresh();
	this.eventHub.emit('findEditors');
	}

	private initInputs(state: TreeState) {
	if (state.cmakeArgs) {
	this.cmakeArgsInput.val(state.cmakeArgs);
	}

	if (state.customOutputFilename) {
	this.customOutputFilenameInput.val(state.customOutputFilename);
	}
	}

	private getCmakeArgs(): string {
	return this.cmakeArgsInput.val() as string;
	}

	private getCustomOutputFilename(): string {
	return _.escape(this.customOutputFilenameInput.val() as string);
	}

	public currentState(): TreeState {
	const state = {
	id: this.id,
	cmakeArgs: this.getCmakeArgs(),
	customOutputFilename: this.getCustomOutputFilename(),
	...this.multifileService.getState(),
	};
	this.paneRenaming.addState(state);
	return state;
	}

	private updateState() {
	const state = this.currentState();
	this.container.setState(state);

	this.updateButtons(state);
	}

	private initCallbacks() {
	this.container.on('resize', this.resize, this);
	this.container.on('shown', this.resize, this);
	this.container.on('open', () => {
	this.eventHub.emit('treeOpen', this.id);
	});
	this.container.on('destroy', this.close, this);

	this.paneRenaming.on('renamePane', this.updateState.bind(this));

	this.eventHub.on('editorOpen', this.onEditorOpen, this);
	this.eventHub.on('editorClose', this.onEditorClose, this);
	this.eventHub.on('compilerOpen', this.onCompilerOpen, this);
	this.eventHub.on('compilerClose', this.onCompilerClose, this);

	this.eventHub.on('compileResult', this.onCompileResponse, this);

	this.toggleCMakeButton.on('change', this.onToggleCMakeChange.bind(this));

	this.cmakeArgsInput.on('change', this.updateCMakeArgs.bind(this));
	this.customOutputFilenameInput.on('change', this.updateCustomOutputFilename.bind(this));
	}

	private updateCMakeArgs() {
	this.updateState();

	this.debouncedEmitChange();
	}

	private updateCustomOutputFilename() {
	this.updateState();

	this.debouncedEmitChange();
	}

	private onToggleCMakeChange() {
	const isOn = this.toggleCMakeButton.get().isCMakeProject;
	this.multifileService.setAsCMakeProject(isOn);

	this.domRoot.find('.cmake-project').prop('title', '[' + (isOn ? 'ON' : 'OFF') + '] CMake project');
	this.updateState();
	}

	private onLanguageChange(newLangId: string) {
	if (newLangId in languages) {
	this.multifileService.setLanguageId(newLangId);
	this.eventHub.emit('languageChange', false, newLangId, this.id);
	}

	this.toggleCMakeButton.enableToggle('isCMakeProject', this.multifileService.isCompatibleWithCMake());

	this.refresh();
	}

	private sendCompilerChangesToEditor(compilerId: number) {
	this.multifileService.forEachOpenFile((file: MultifileFile) => {
	if (file.isIncluded) {
	this.eventHub.emit('treeCompilerEditorIncludeChange', this.id, file.editorId, compilerId);
	} else {
	this.eventHub.emit('treeCompilerEditorExcludeChange', this.id, file.editorId, compilerId);
	}
	});

	this.eventHub.emit('resendCompilation', compilerId);
	}

	private sendCompileRequests() {
	this.eventHub.emit('requestCompilation', false, this.id);
	}

	private sendChangesToAllEditors() {
	for (const compilerId in this.ourCompilers) {
	this.sendCompilerChangesToEditor(parseInt(compilerId));
	}
	}

	private onCompilerOpen(compilerId: number, unused, treeId: number \| boolean) {
	if (treeId === this.id) {
	this.ourCompilers[compilerId] = true;
	this.sendCompilerChangesToEditor(compilerId);
	}
	}

	private onCompilerClose(compilerId: number, treeId: number \| boolean) {
	if (treeId === this.id) {
	delete this.ourCompilers[compilerId];
	}
	}

	private onEditorOpen(editorId: number) {
	const file = this.multifileService.getFileByEditorId(editorId);
	if (file) return;

	this.multifileService.addFileForEditorId(editorId);
	this.refresh();
	this.sendChangesToAllEditors();
	}

	private onEditorClose(editorId: number) {
	const file = this.multifileService.getFileByEditorId(editorId);

	if (file) {
	file.isOpen = false;
	const editor = this.hub.getEditorById(editorId);
	file.langId = editor.currentLanguage.id;
	file.content = editor.getSource();
	file.editorId = -1;
	}

	this.refresh();
	}

	private removeFile(fileId: number) {
	const file = this.multifileService.removeFileByFileId(fileId);
	if (file) {
	if (file.isOpen) {
	const editor = this.hub.getEditorById(file.editorId);
	if (editor) {
	editor.container.close();
	}
	}
	}

	this.refresh();
	}

	private addRowToTreelist(file: MultifileFile) {
	const item = $(this.rowTemplate.children()[0].cloneNode(true));
	const stageButton = item.find('.stage-file');
	const unstageButton = item.find('.unstage-file');
	const renameButton = item.find('.rename-file');
	const deleteButton = item.find('.delete-file');

	item.data('fileId', file.fileId);
	if (file.filename) {
	item.find('.filename').text(file.filename);
	} else if (file.editorId > 0) {
	const editor = this.hub.getEditorById(file.editorId);
	if (editor) {
	item.find('.filename').text(editor.getPaneName());
	} else {
	// wait for editor to appear first
	return;
	}
	} else {
	item.find('.filename').text('Unknown file');
	}

	item.on('click', e => {
	const fileId = $(e.currentTarget).data('fileId');
	this.editFile(fileId);
	});

	renameButton.on('click', async e => {
	const fileId = $(e.currentTarget).parent('li').data('fileId');
	await this.multifileService.renameFile(fileId);
	this.refresh();
	});

	deleteButton.on('click', e => {
	const fileId = $(e.currentTarget).parent('li').data('fileId');
	const file = this.multifileService.getFileByFileId(fileId);
	if (file) {
	this.alertSystem.ask(
	'Delete file',
	`Are you sure you want to delete ${file.filename ? _.escape(file.filename) : 'this file'}?`,
	{
	yes: () => {
	this.removeFile(fileId);
	},
	yesClass: 'btn-danger',
	yesHtml: 'Delete',
	noClass: 'btn-primary',
	noHtml: 'Cancel',
	}
	);
	}
	});

	stageButton.on('click', async e => {
	const fileId = $(e.currentTarget).parent('li').data('fileId');
	await this.moveToInclude(fileId);
	});
	unstageButton.on('click', async e => {
	const fileId = $(e.currentTarget).parent('li').data('fileId');
	await this.moveToExclude(fileId);
	});
	stageButton.toggle(!file.isIncluded);
	unstageButton.toggle(file.isIncluded);
	// @ts-ignore TODO type mismatch
	(file.isIncluded ? this.namedItems : this.unnamedItems).append(item);
	}

	private refresh() {
	this.updateState();

	this.namedItems.html('');
	this.unnamedItems.html('');

	this.multifileService.forEachFile((file: MultifileFile) => this.addRowToTreelist(file));
	}

	private editFile(fileId: number) {
	const file = this.multifileService.getFileByFileId(fileId);
	if (file) {
	if (!file.isOpen) {
	const dragConfig = this.getConfigForNewEditor(file);
	file.isOpen = true;

	this.hub.addInEditorStackIfPossible(dragConfig);
	} else {
	const editor = this.hub.getEditorById(file.editorId);
	this.hub.activateTabForContainer(editor.container);
	}

	this.sendChangesToAllEditors();
	}
	}

	private async moveToInclude(fileId: number) {
	await this.multifileService.includeByFileId(fileId);

	this.refresh();
	this.sendChangesToAllEditors();
	}

	private async moveToExclude(fileId: number) {
	await this.multifileService.excludeByFileId(fileId);
	this.refresh();
	this.sendChangesToAllEditors();
	}

	private bindClickToOpenPane(dragSource, dragConfig) {
	(this.container.layoutManager.createDragSource(dragSource, dragConfig.bind(this)) as any)._dragListener.on(
	'dragStart',
	() => {
	this.domRoot.find('.add-pane').dropdown('toggle');
	}
	);

	dragSource.on('click', () => {
	this.hub.addInEditorStackIfPossible(dragConfig.bind(this));
	});
	}

	private getConfigForNewCompiler() {
	return Components.getCompilerForTree(this.id, this.currentState().compilerLanguageId);
	}

	private getConfigForNewExecutor() {
	return Components.getExecutorForTree(this.id, this.currentState().compilerLanguageId);
	}

	private getConfigForNewEditor(file: MultifileFile \| undefined) {
	let editor;
	const editorId = this.hub.nextEditorId();

	if (file) {
	file.editorId = editorId;
	editor = Components.getEditor(editorId, file.langId);

	editor.componentState.source = file.content;
	if (file.filename) {
	editor.componentState.filename = file.filename;
	}
	} else {
	editor = Components.getEditor(editorId, this.multifileService.getLanguageId());
	}

	return editor;
	}

	private static getFormattedDateTime() {
	const d = new Date();
	const t = x => x.slice(-2);
	// Hopefully some day we can use the temporal api to make this less of a pain
	return (
	`${d.getFullYear()} ${t('0' + (d.getMonth() + 1))} ${t('0' + d.getDate())}` +
	`${t('0' + d.getHours())} ${t('0' + d.getMinutes())} ${t('0' + d.getSeconds())}`
	);
	}

	private static triggerSaveAs(blob) {
	const dt = Tree.getFormattedDateTime();
	saveAs(blob, `project-${dt}.zip`);
	}

	private initButtons(state: TreeState) {
	const addCompilerButton = this.domRoot.find('.add-compiler');
	const addExecutorButton = this.domRoot.find('.add-executor');
	const addEditorButton = this.domRoot.find('.add-editor');
	const saveProjectButton = this.domRoot.find('.save-project-to-file');

	saveProjectButton.on('click', async () => {
	await this.multifileService.saveProjectToZipfile(Tree.triggerSaveAs.bind(this));
	});

	const loadProjectFromFile = this.domRoot.find('.load-project-from-file') as JQuery<HTMLInputElement>;
	loadProjectFromFile.on('change', async e => {
	const files = e.target.files;
	if (files && files.length > 0) {
	this.multifileService.forEachFile((file: MultifileFile) => {
	this.removeFile(file.fileId);
	});

	await this.multifileService.loadProjectFromFile(files[0], (file: MultifileFile) => {
	this.refresh();
	if (file.filename === 'CMakeLists.txt') {
	// todo: find a way to toggle on CMake checkbox...
	this.editFile(file.fileId);
	}
	});
	}
	});

	this.bindClickToOpenPane(addCompilerButton, this.getConfigForNewCompiler);
	this.bindClickToOpenPane(addExecutorButton, this.getConfigForNewExecutor);
	this.bindClickToOpenPane(addEditorButton, this.getConfigForNewEditor);

	this.languageBtn = this.domRoot.find('.change-language');
	if (!(this.languageBtn[0] instanceof HTMLSelectElement)) {
	throw new Error('.language-button is not an HTMLSelectElement');
	}
	if (this.langKeys.length <= 1) {
	this.languageBtn.prop('disabled', true);
	}

	this.toggleCMakeButton = new Toggles(
	this.domRoot.find('.options'),
	state as unknown as Record<string, boolean>
	);
	}

	private numberUsedLines() {
	if (_.any(this.busyCompilers)) return;

	if (!this.settings.colouriseAsm) {
	this.updateColoursNone();
	return;
	}

	this.lineColouring.clear();

	for (const [compilerId, asm] of Object.entries(this.asmByCompiler)) {
	if (asm) {
	this.lineColouring.addFromAssembly(parseInt(compilerId), asm);
	}
	}

	this.lineColouring.calculate();

	this.updateColours();
	}

	private updateColours() {
	for (const compilerId in this.ourCompilers) {
	const id: number = parseInt(compilerId);
	this.eventHub.emit(
	'coloursForCompiler',
	id,
	this.lineColouring.getColoursForCompiler(id),
	this.settings.colourScheme
	);
	}

	this.multifileService.forEachOpenFile((file: MultifileFile) => {
	this.eventHub.emit(
	'coloursForEditor',
	file.editorId,
	this.lineColouring.getColoursForEditor(file.editorId),
	this.settings.colourScheme
	);
	});
	}

	private updateColoursNone() {
	for (const compilerId in this.ourCompilers) {
	this.eventHub.emit('coloursForCompiler', parseInt(compilerId), {}, this.settings.colourScheme);
	}

	this.multifileService.forEachOpenFile((file: MultifileFile) => {
	this.eventHub.emit('coloursForEditor', file.editorId, {}, this.settings.colourScheme);
	});
	}

	private onCompileResponse(compilerId: number, compiler, result) {
	if (!this.ourCompilers[compilerId]) return;

	this.busyCompilers[compilerId] = false;

	// todo: parse errors and warnings and relate them to lines in the code
	// note: requires info about the filename, do we currently have that?

	// eslint-disable-next-line max-len
	// {"text":"/tmp/compiler-explorer-compiler2021428-7126-95g4xc.zfo8p/example.cpp:4:21: error: expected ‘;’ before ‘}’ token"}

	if (result.result && result.result.asm) {
	this.asmByCompiler[compilerId] = result.result.asm;
	} else {
	this.asmByCompiler[compilerId] = result.asm;
	}

	this.numberUsedLines();
	}

	private updateButtons(state: TreeState) {
	if (state.isCMakeProject) {
	this.cmakeArgsInput.parent().removeClass('d-none');
	this.customOutputFilenameInput.parent().removeClass('d-none');
	} else {
	this.cmakeArgsInput.parent().addClass('d-none');
	this.customOutputFilenameInput.parent().addClass('d-none');
	}
	}

	private resize() {
	utils.updateAndCalcTopBarHeight(this.domRoot, this.topBar, this.hideable);

	const mainbarHeight = this.topBar.outerHeight(true) as number;
	const argsHeight = this.domRoot.find('.panel-args').outerHeight(true) as number;
	const outputfileHeight = this.domRoot.find('.panel-outputfile').outerHeight(true) as number;
	const innerHeight = this.domRoot.innerHeight() as number;

	this.root.height(innerHeight - mainbarHeight - argsHeight - outputfileHeight);
	}

	private onSettingsChange(newSettings) {
	this.debouncedEmitChange = _.debounce(() => {
	this.sendCompileRequests();
	}, newSettings.delayAfterChange);
	}

	private getPaneName() {
	return `Tree #${this.id}`;
	}

	private updateTitle() {
	const name = this.paneName ? this.paneName : this.getPaneName();
	this.container.setTitle(_.escape(name));
	}

	private close() {
	this.eventHub.unsubscribe();
	this.eventHub.emit('treeClose', this.id);
	this.hub.removeTree(this.id);
	$('#add-tree').prop('disabled', false);
	}
	}