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