git.scottworley.com Git - vopamoi/blob - vopamoi.ts

   1 // Typescript doesn't know about MAX_SAFE_INTEGER??  This was supposed to be
   2 // fixed in typescript 2.0.1 in 2016, but is not working for me in typescript
   3 // 4.2.4 in 2022.  :( https://github.com/microsoft/TypeScript/issues/9937
   4 //const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER;
   5 const MAX_SAFE_INTEGER = 9007199254740991;
   6
   7 // A sane split that splits N *times*, leaving the last chunk unsplit.
   8 function splitN(str: string, delimiter: string, limit: number = MAX_SAFE_INTEGER): string[] {
   9   if (limit < 1) {
  10     return [str];
  11   }
  12   const at = str.indexOf(delimiter);
  13   return at === -1 ? [str] : [str.substring(0, at)].concat(splitN(str.substring(at + delimiter.length), delimiter, limit - 1));
  14 }
  15
  16 // A clock that never goes backwards; monotonic.
  17 function Clock() {
  18   var previousNow = Date.now();
  19   return {
  20     now: function (): number {
  21       const now = Date.now();
  22       if (now > previousNow) {
  23         previousNow = now;
  24         return now;
  25       }
  26       return ++previousNow;
  27     },
  28   };
  29 }
  30 const clock = Clock();
  31
  32 // Returns a promise for a hue based on a hash of the string
  33 function hashHue(str: string) {
  34   // Using crypto for this is overkill
  35   return crypto.subtle.digest("SHA-256", new TextEncoder().encode(str)).then((buf) => (new Uint16Array(buf)[0] * 360) / 2 ** 16);
  36 }
  37
  38 const Model = {
  39   addTask: function (timestamp: string, description: string): Element {
  40     const task = document.createElement("div");
  41     const desc = document.createElement("span");
  42     desc.textContent = description;
  43     desc.classList.add("desc");
  44     task.appendChild(desc);
  45     task.classList.add("task");
  46     task.setAttribute("tabindex", "0");
  47     task.setAttribute("data-created", timestamp);
  48     task.setAttribute("data-state", "todo");
  49     const tasks = document.getElementById("tasks")!;
  50     tasks.insertBefore(task, tasks.firstElementChild);
  51     return task;
  52   },
  53
  54   addTag: function (createTimestamp: string, tagName: string): Element | null {
  55     const task = this.getTask(createTimestamp);
  56     if (!task) return null;
  57     const existingTag = this.hasTag(task, tagName);
  58     if (existingTag) return existingTag;
  59     const tag = document.createElement("span");
  60     tag.appendChild(document.createTextNode(tagName));
  61     tag.classList.add("tag");
  62     tag.setAttribute("tabindex", "0");
  63     hashHue(tagName).then((hue) => (tag.style.backgroundColor = `hsl(${hue},90%,45%)`));
  64     for (const child of task.getElementsByClassName("tag")) {
  65       if (tagName > child.textContent!) {
  66         task.insertBefore(tag, child);
  67         return tag;
  68       }
  69     }
  70     task.appendChild(tag);
  71     return tag;
  72   },
  73
  74   edit: function (createTimestamp: string, newDescription: string): Element | null {
  75     const target = this.getTask(createTimestamp);
  76     if (!target) return null;
  77     if (target.hasAttribute("data-description")) {
  78       // Oh no: An edit has arrived from a replica while a local edit is in progress.
  79       const input = target.firstChild as HTMLInputElement;
  80       if (
  81         input.value === target.getAttribute("data-description") &&
  82         input.selectionStart === input.value.length &&
  83         input.selectionEnd === input.value.length
  84       ) {
  85         // No local changes have actually been made yet.  Change the contents of the edit box!
  86         input.value = newDescription;
  87       } else {
  88         // No great options.
  89         // Prefer not to interrupt the local user's edit.
  90         // The remote edit is mostly lost; this mostly becomes last-write-wins.
  91         target.setAttribute("data-description", newDescription);
  92       }
  93     } else {
  94       target.getElementsByClassName("desc")[0].textContent = newDescription;
  95     }
  96     return target;
  97   },
  98
  99   hasTag: function (task: Element, tag: string): Element | null {
 100     for (const child of task.getElementsByClassName("tag")) {
 101       if (child.textContent === tag) {
 102         return child;
 103       }
 104     }
 105     return null;
 106   },
 107
 108   getPriority: function (task: Element): number {
 109     if (task.hasAttribute("data-priority")) {
 110       return parseFloat(task.getAttribute("data-priority")!);
 111     }
 112     return parseFloat(task.getAttribute("data-created")!);
 113   },
 114
 115   getTask: function (createTimestamp: string) {
 116     for (const task of document.getElementsByClassName("task")) {
 117       if (task.getAttribute("data-created") === createTimestamp) {
 118         return task;
 119       }
 120     }
 121   },
 122
 123   removeTag: function (createTimestamp: string, tagName: string) {
 124     const task = this.getTask(createTimestamp);
 125     if (!task) return null;
 126     const tag = this.hasTag(task, tagName);
 127     if (!tag) return;
 128     task.removeChild(tag);
 129     if (task instanceof HTMLElement) task.focus();
 130   },
 131
 132   setPriority: function (createTimestamp: string, priority: number): Element | null {
 133     const target = this.getTask(createTimestamp);
 134     if (!target) return null;
 135     target.setAttribute("data-priority", `${priority}`);
 136     for (const task of document.getElementsByClassName("task")) {
 137       if (task !== target && this.getPriority(task) < priority) {
 138         task.parentElement!.insertBefore(target, task);
 139         return target;
 140       }
 141     }
 142     document.getElementById("tasks")!.appendChild(target);
 143     return target;
 144   },
 145
 146   setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
 147     const task = this.getTask(createTimestamp);
 148     if (!task) return;
 149     task.setAttribute("data-state", state);
 150     var date = task.getElementsByClassName("statedate")[0];
 151     if (state === "todo") {
 152       task.removeChild(date);
 153       return;
 154     }
 155     if (!date) {
 156       date = document.createElement("span");
 157       date.classList.add("statedate");
 158       task.insertBefore(date, task.firstChild);
 159     }
 160     const d = new Date(parseInt(stateTimestamp));
 161     date.textContent = `${d.getFullYear()}-${`${d.getMonth() + 1}`.padStart(2, "0")}-${`${d.getDate()}`.padStart(2, "0")}`;
 162   },
 163 };
 164
 165 function Log(prefix: string = "vp-") {
 166   var next_log_index = 0;
 167   return {
 168     apply: function (entry: string) {
 169       const [timestamp, command, data] = splitN(entry, " ", 2);
 170       if (command == "Create") {
 171         return Model.addTask(timestamp, data);
 172       }
 173       if (command == "Edit") {
 174         const [createTimestamp, description] = splitN(data, " ", 1);
 175         return Model.edit(createTimestamp, description);
 176       }
 177       if (command == "Priority") {
 178         const [createTimestamp, newPriority] = splitN(data, " ", 1);
 179         return Model.setPriority(createTimestamp, parseFloat(newPriority));
 180       }
 181       if (command == "State") {
 182         const [createTimestamp, state] = splitN(data, " ", 1);
 183         return Model.setState(timestamp, createTimestamp, state);
 184       }
 185       if (command == "Tag") {
 186         const [createTimestamp, tag] = splitN(data, " ", 1);
 187         return Model.addTag(createTimestamp, tag);
 188       }
 189       if (command == "Untag") {
 190         const [createTimestamp, tag] = splitN(data, " ", 1);
 191         return Model.removeTag(createTimestamp, tag);
 192       }
 193     },
 194
 195     record: function (entry: string) {
 196       window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
 197     },
 198
 199     recordAndApply: function (entry: string) {
 200       this.record(entry);
 201       return this.apply(entry);
 202     },
 203
 204     replay: function () {
 205       while (true) {
 206         const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
 207         if (entry === null) {
 208           break;
 209         }
 210         this.apply(entry);
 211         next_log_index++;
 212       }
 213     },
 214   };
 215 }
 216 const log = Log();
 217
 218 function UI() {
 219   const undoLog: string[][] = [];
 220   const redoLog: string[][] = [];
 221   function perform(forward: string, reverse: string) {
 222     undoLog.push([reverse, forward]);
 223     return log.recordAndApply(`${clock.now()} ${forward}`);
 224   }
 225   return {
 226     addTask: function (description: string): Element {
 227       const now = clock.now();
 228       undoLog.push([`State ${now} deleted`, `State ${now} todo`]);
 229       return <Element>log.recordAndApply(`${now} Create ${description}`);
 230     },
 231     addTag: function (createTimestamp: string, tag: string) {
 232       return perform(`Tag ${createTimestamp} ${tag}`, `Untag ${createTimestamp} ${tag}`);
 233     },
 234     edit: function (createTimestamp: string, newDescription: string, oldDescription: string) {
 235       return perform(`Edit ${createTimestamp} ${newDescription}`, `Edit ${createTimestamp} ${oldDescription}`);
 236     },
 237     removeTag: function (createTimestamp: string, tag: string) {
 238       return perform(`Untag ${createTimestamp} ${tag}`, `Tag ${createTimestamp} ${tag}`);
 239     },
 240     setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
 241       return perform(`Priority ${createTimestamp} ${newPriority}`, `Priority ${createTimestamp} ${oldPriority}`);
 242     },
 243     setState: function (createTimestamp: string, newState: string, oldState: string) {
 244       return perform(`State ${createTimestamp} ${newState}`, `State ${createTimestamp} ${oldState}`);
 245     },
 246     undo: function () {
 247       const entry = undoLog.pop();
 248       if (entry) {
 249         redoLog.push(entry);
 250         return log.recordAndApply(`${clock.now()} ${entry[0]}`);
 251       }
 252     },
 253     redo: function () {
 254       const entry = redoLog.pop();
 255       if (entry) {
 256         undoLog.push(entry);
 257         return log.recordAndApply(`${clock.now()} ${entry[1]}`);
 258       }
 259     },
 260   };
 261 }
 262 const ui = UI();
 263
 264 enum CommitOrAbort {
 265   Commit,
 266   Abort,
 267 }
 268
 269 function BrowserUI() {
 270   const viewColors: { [key: string]: string } = {
 271     all: "Gold",
 272     cancelled: "Red",
 273     deleted: "Black",
 274     done: "LawnGreen",
 275     "someday-maybe": "DeepSkyBlue",
 276     todo: "White",
 277     waiting: "MediumOrchid",
 278   };
 279   var currentViewState = "todo";
 280   var taskFocusedBeforeJumpingToInput: HTMLElement | null = null;
 281   var lastTagNameEntered = "";
 282   return {
 283     addTask: function (event: KeyboardEvent) {
 284       const input = <HTMLInputElement>document.getElementById("taskName");
 285       if (input.value.match(/^ *$/)) return;
 286       const task = ui.addTask(input.value);
 287       if (currentViewState === "todo" || currentViewState === "all") {
 288         task instanceof HTMLElement && task.focus();
 289       } else if (this.returnFocusAfterInput()) {
 290       } else {
 291         this.firstVisibleTask()?.focus();
 292       }
 293       input.value = "";
 294       if (event.getModifierState("Control")) {
 295         this.makeBottomPriority(task);
 296       }
 297     },
 298
 299     beginEdit: function (event: Event) {
 300       var task = document.activeElement;
 301       if (!task) return;
 302       if (task.classList.contains("tag")) task = task.parentElement!;
 303       const input = document.createElement("input");
 304       const desc = task.getElementsByClassName("desc")[0];
 305       const oldDescription = desc.textContent!;
 306       task.setAttribute("data-description", oldDescription);
 307       input.value = oldDescription;
 308       input.addEventListener("blur", this.completeEdit, { once: true });
 309       desc.textContent = "";
 310       task.insertBefore(input, task.firstChild);
 311       input.focus();
 312       event.preventDefault();
 313     },
 314
 315     beginTagEdit: function (event: Event) {
 316       const task = document.activeElement;
 317       if (!task) return;
 318       const input = document.createElement("input");
 319       input.classList.add("tag");
 320       input.addEventListener("blur", this.completeTagEdit, { once: true });
 321       input.value = lastTagNameEntered;
 322       task.appendChild(input);
 323       input.focus();
 324       input.select();
 325       event.preventDefault();
 326     },
 327
 328     completeEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
 329       const input = event.target as HTMLInputElement;
 330       const task = input.parentElement!;
 331       const desc = task.getElementsByClassName("desc")[0];
 332       const oldDescription = task.getAttribute("data-description")!;
 333       const newDescription = input.value;
 334       input.removeEventListener("blur", this.completeEdit);
 335       task.removeChild(input);
 336       task.removeAttribute("data-description");
 337       task.focus();
 338       if (resolution === CommitOrAbort.Abort || newDescription.match(/^ *$/) || newDescription === oldDescription) {
 339         desc.textContent = oldDescription;
 340       } else {
 341         ui.edit(task.getAttribute("data-created")!, newDescription, oldDescription);
 342       }
 343     },
 344
 345     completeTagEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
 346       const input = event.target as HTMLInputElement;
 347       const task = input.parentElement!;
 348       const newTagName = input.value;
 349       input.removeEventListener("blur", this.completeTagEdit);
 350       task.removeChild(input);
 351       task.focus();
 352       if (resolution === CommitOrAbort.Commit && !newTagName.match(/^ *$/) && !Model.hasTag(task, newTagName)) {
 353         ui.addTag(task.getAttribute("data-created")!, newTagName);
 354         lastTagNameEntered = newTagName;
 355       }
 356     },
 357
 358     firstVisibleTask: function () {
 359       for (const task of document.getElementsByClassName("task")) {
 360         const state = task.getAttribute("data-state");
 361         if (task instanceof HTMLElement && (state === currentViewState || (currentViewState === "all" && state !== "deleted"))) {
 362           return task;
 363         }
 364       }
 365     },
 366
 367     focusTaskNameInput: function (event: Event) {
 368       if (document.activeElement instanceof HTMLElement) {
 369         taskFocusedBeforeJumpingToInput = document.activeElement;
 370       }
 371       document.getElementById("taskName")!.focus();
 372       window.scroll(0, 0);
 373       event.preventDefault();
 374     },
 375
 376     visibleTaskAtOffset(task: Element, offset: number): Element {
 377       var cursor: Element | null = task;
 378       var valid_cursor = cursor;
 379       const increment = offset / Math.abs(offset);
 380       while (true) {
 381         cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
 382         if (!cursor || !(cursor instanceof HTMLElement)) break;
 383         const state = cursor.getAttribute("data-state")!;
 384         if (state === currentViewState || (currentViewState === "all" && state !== "deleted")) {
 385           offset -= increment;
 386           valid_cursor = cursor;
 387         }
 388         if (Math.abs(offset) < 0.5) break;
 389       }
 390       return valid_cursor;
 391     },
 392
 393     jumpCursor: function (position: number) {
 394       const first = this.firstVisibleTask();
 395       if (!first) return;
 396       const dest = this.visibleTaskAtOffset(first, position - 1);
 397       if (dest instanceof HTMLElement) dest.focus();
 398     },
 399
 400     makeBottomPriority: function (task: Element | null = null) {
 401       if (!task) task = document.activeElement;
 402       if (!task) return;
 403       this.setPriority(task, document.getElementById("tasks")!.lastElementChild, null);
 404     },
 405
 406     makeTopPriority: function (task: Element | null = null) {
 407       if (!task) task = document.activeElement;
 408       if (!task) return;
 409       ui.setPriority(task.getAttribute("data-created")!, clock.now(), Model.getPriority(task));
 410       task instanceof HTMLElement && task.focus();
 411     },
 412
 413     moveCursor: function (offset: number): boolean {
 414       const active = document.activeElement;
 415       if (!active) return false;
 416       const dest = this.visibleTaskAtOffset(active, offset);
 417       if (dest !== active && dest instanceof HTMLElement) {
 418         dest.focus();
 419         return true;
 420       }
 421       return false;
 422     },
 423
 424     moveTask: function (offset: number) {
 425       const active = document.activeElement;
 426       if (!active) return;
 427       const dest = this.visibleTaskAtOffset(active, offset);
 428       if (dest === active) return; // Already extremal
 429       var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
 430       if (onePastDest == dest) onePastDest = null; // Will become extremal
 431       if (offset > 0) {
 432         this.setPriority(active, dest, onePastDest);
 433       } else {
 434         this.setPriority(active, onePastDest, dest);
 435       }
 436     },
 437
 438     removeTag: function () {
 439       var target = document.activeElement;
 440       if (!target) return;
 441       if (target.classList.contains("task")) {
 442         const tags = target.getElementsByClassName("tag");
 443         target = tags[tags.length - 1];
 444       }
 445       if (!target || !target.classList.contains("tag")) return;
 446       ui.removeTag(target.parentElement!.getAttribute("data-created")!, target.textContent!);
 447     },
 448
 449     returnFocusAfterInput: function (): boolean {
 450       if (taskFocusedBeforeJumpingToInput) {
 451         taskFocusedBeforeJumpingToInput.focus();
 452         return true;
 453       }
 454       return false;
 455     },
 456
 457     // Change task's priority to be between other tasks a and b.
 458     setPriority: function (task: Element, a: Element | null, b: Element | null) {
 459       const aPriority = a === null ? clock.now() : Model.getPriority(a);
 460       const bPriority = b === null ? 0 : Model.getPriority(b);
 461       console.assert(aPriority > bPriority, aPriority, ">", bPriority);
 462       const span = aPriority - bPriority;
 463       const newPriority = bPriority + 0.1 * span + 0.8 * span * Math.random();
 464       console.assert(aPriority > newPriority && newPriority > bPriority, aPriority, ">", newPriority, ">", bPriority);
 465       const newPriorityRounded = Math.round(newPriority);
 466       const okToRound = aPriority > newPriorityRounded && newPriorityRounded > bPriority;
 467       ui.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
 468       task instanceof HTMLElement && task.focus();
 469     },
 470
 471     setState: function (newState: string) {
 472       const task = document.activeElement;
 473       if (!task) return;
 474       const oldState = task.getAttribute("data-state")!;
 475       if (newState === oldState) return;
 476       const createTimestamp = task.getAttribute("data-created")!;
 477       if (currentViewState !== "all" || newState == "deleted") {
 478         this.moveCursor(1) || this.moveCursor(-1);
 479       }
 480       return ui.setState(createTimestamp, newState, oldState);
 481     },
 482
 483     setView: function (state: string) {
 484       const sheet = (document.getElementById("viewStyle") as HTMLStyleElement).sheet!;
 485       if (state === "all") {
 486         sheet.insertRule(`.task[data-state=deleted] { display: none }`);
 487       } else {
 488         sheet.insertRule(`.task:not([data-state=${state}]) { display: none }`);
 489       }
 490       sheet.insertRule(`:root { --view-state-indicator-color: ${viewColors[state]}; }`);
 491       sheet.removeRule(2);
 492       sheet.removeRule(2);
 493       currentViewState = state;
 494       if (document.activeElement?.getAttribute("data-state") !== state) {
 495         this.firstVisibleTask()?.focus();
 496       }
 497     },
 498
 499     undo: function () {
 500       const ret = ui.undo();
 501       if (ret && ret instanceof HTMLElement) ret.focus();
 502     },
 503     redo: function () {
 504       const ret = ui.redo();
 505       if (ret && ret instanceof HTMLElement) ret.focus();
 506     },
 507   };
 508 }
 509 const browserUI = BrowserUI();
 510
 511 const scrollIncrement = 60;
 512 enum InputState {
 513   Root,
 514   S,
 515   V,
 516   VS,
 517 }
 518 var inputState = InputState.Root;
 519 var inputCount: number | null = null;
 520
 521 function handleKey(event: any) {
 522   if (["Alt", "Control", "Meta", "Shift"].includes(event.key)) return;
 523   if (event.target.tagName === "INPUT") {
 524     if (event.target.id === "taskName") {
 525       if (event.key == "Enter") return browserUI.addTask(event);
 526       if (event.key == "Escape") return browserUI.returnFocusAfterInput();
 527     } else if (event.target.classList.contains("tag")) {
 528       if (event.key == "Enter") return browserUI.completeTagEdit(event);
 529       if (event.key == "Escape") return browserUI.completeTagEdit(event, CommitOrAbort.Abort);
 530     } else {
 531       if (event.key == "Enter") return browserUI.completeEdit(event);
 532       if (event.key == "Escape") return browserUI.completeEdit(event, CommitOrAbort.Abort);
 533     }
 534   } else {
 535     if (inputState === InputState.Root) {
 536       if ("0" <= event.key && event.key <= "9") {
 537         return (inputCount = (inputCount ?? 0) * 10 + parseInt(event.key));
 538       }
 539       try {
 540         if (event.ctrlKey) {
 541           if (event.key == "e") return window.scrollBy(0, (inputCount ?? 1) * scrollIncrement);
 542           if (event.key == "y") return window.scrollBy(0, (inputCount ?? 1) * -scrollIncrement);
 543         } else {
 544           if (event.key == "j") return browserUI.moveCursor(inputCount ?? 1);
 545           if (event.key == "k") return browserUI.moveCursor(-(inputCount ?? 1));
 546           if (event.key == "J") return browserUI.moveTask(inputCount ?? 1);
 547           if (event.key == "K") return browserUI.moveTask(-(inputCount ?? 1));
 548           if (event.key == "G") return browserUI.jumpCursor(inputCount ?? MAX_SAFE_INTEGER);
 549           if (event.key == "T") return browserUI.makeTopPriority();
 550           if (event.key == "n") return browserUI.focusTaskNameInput(event);
 551           if (event.key == "c") return browserUI.setState("cancelled");
 552           if (event.key == "d") return browserUI.setState("done");
 553           if (event.key == "q") return browserUI.setState("todo");
 554           if (event.key == "s") return (inputState = InputState.S);
 555           if (event.key == "w") return browserUI.setState("waiting");
 556           if (event.key == "X") return browserUI.setState("deleted");
 557           if (event.key == "x") return browserUI.removeTag();
 558           if (event.key == "u") return browserUI.undo();
 559           if (event.key == "r") return browserUI.redo();
 560           if (event.key == "e") return browserUI.beginEdit(event);
 561           if (event.key == "t") return browserUI.beginTagEdit(event);
 562           if (event.key == "v") return (inputState = InputState.V);
 563         }
 564       } finally {
 565         inputCount = null;
 566       }
 567     } else if (inputState === InputState.S) {
 568       inputState = InputState.Root;
 569       if (event.key == "m") return browserUI.setState("someday-maybe");
 570     } else if (inputState === InputState.V) {
 571       inputState = InputState.Root;
 572       if (event.key == "a") return browserUI.setView("all");
 573       if (event.key == "c") return browserUI.setView("cancelled");
 574       if (event.key == "d") return browserUI.setView("done");
 575       if (event.key == "q") return browserUI.setView("todo");
 576       if (event.key == "s") return (inputState = InputState.VS);
 577       if (event.key == "v") return browserUI.setView("todo");
 578       if (event.key == "w") return browserUI.setView("waiting");
 579       if (event.key == "x") return browserUI.setView("deleted");
 580     } else if (inputState === InputState.VS) {
 581       inputState = InputState.Root;
 582       if (event.key == "m") return browserUI.setView("someday-maybe");
 583     }
 584   }
 585 }
 586
 587 function browserInit() {
 588   log.replay();
 589   browserUI.firstVisibleTask()?.focus();
 590   document.body.addEventListener("keydown", handleKey, { capture: false });
 591 }