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       const task = document.activeElement;
 291       if (!task) return;
 292       const input = document.createElement("input");
 293       const desc = task.getElementsByClassName("desc")[0];
 294       const oldDescription = desc.textContent!;
 295       task.setAttribute("data-description", oldDescription);
 296       input.value = oldDescription;
 297       input.addEventListener("blur", this.completeEdit, { once: true });
 298       desc.textContent = "";
 299       task.insertBefore(input, task.firstChild);
 300       input.focus();
 301       event.preventDefault();
 302     },
 303
 304     beginTagEdit: function (event: Event) {
 305       const task = document.activeElement;
 306       if (!task) return;
 307       const input = document.createElement("input");
 308       input.classList.add("tag");
 309       input.addEventListener("blur", this.completeTagEdit, { once: true });
 310       input.value = lastTagNameEntered;
 311       task.appendChild(input);
 312       input.focus();
 313       input.select();
 314       event.preventDefault();
 315     },
 316
 317     completeEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
 318       const input = event.target as HTMLInputElement;
 319       const task = input.parentElement!;
 320       const desc = task.getElementsByClassName("desc")[0];
 321       const oldDescription = task.getAttribute("data-description")!;
 322       const newDescription = input.value;
 323       input.removeEventListener("blur", this.completeEdit);
 324       task.removeChild(input);
 325       task.removeAttribute("data-description");
 326       task.focus();
 327       if (resolution === CommitOrAbort.Abort || newDescription.match(/^ *$/) || newDescription === oldDescription) {
 328         desc.textContent = oldDescription;
 329       } else {
 330         ui.edit(task.getAttribute("data-created")!, newDescription, oldDescription);
 331       }
 332     },
 333
 334     completeTagEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
 335       const input = event.target as HTMLInputElement;
 336       const task = input.parentElement!;
 337       const newTagName = input.value;
 338       input.removeEventListener("blur", this.completeTagEdit);
 339       task.removeChild(input);
 340       task.focus();
 341       if (resolution === CommitOrAbort.Commit && !newTagName.match(/^ *$/) && !Model.hasTag(task, newTagName)) {
 342         ui.addTag(task.getAttribute("data-created")!, newTagName);
 343         lastTagNameEntered = newTagName;
 344       }
 345     },
 346
 347     firstVisibleTask: function () {
 348       for (const task of document.getElementsByClassName("task")) {
 349         const state = task.getAttribute("data-state");
 350         if (task instanceof HTMLElement && (state === currentViewState || (currentViewState === "all" && state !== "deleted"))) {
 351           return task;
 352         }
 353       }
 354     },
 355
 356     focusTaskNameInput: function (event: Event) {
 357       if (document.activeElement instanceof HTMLElement) {
 358         taskFocusedBeforeJumpingToInput = document.activeElement;
 359       }
 360       document.getElementById("taskName")!.focus();
 361       event.preventDefault();
 362     },
 363
 364     visibleTaskAtOffset(task: Element, offset: number): Element {
 365       var cursor: Element | null = task;
 366       var valid_cursor = cursor;
 367       const increment = offset / Math.abs(offset);
 368       while (true) {
 369         cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
 370         if (!cursor || !(cursor instanceof HTMLElement)) break;
 371         const state = cursor.getAttribute("data-state")!;
 372         if (state === currentViewState || (currentViewState === "all" && state !== "deleted")) {
 373           offset -= increment;
 374           valid_cursor = cursor;
 375         }
 376         if (Math.abs(offset) < 0.5) break;
 377       }
 378       return valid_cursor;
 379     },
 380
 381     jumpCursor: function (position: number) {
 382       const first = this.firstVisibleTask();
 383       if (!first) return;
 384       const dest = this.visibleTaskAtOffset(first, position - 1);
 385       if (dest instanceof HTMLElement) dest.focus();
 386     },
 387
 388     makeTopPriority: function (task: Element | null = null) {
 389       if (!task) task = document.activeElement;
 390       if (!task) return;
 391       this.setPriority(task, null, document.getElementsByClassName("task")[0]);
 392     },
 393
 394     moveCursor: function (offset: number): boolean {
 395       const active = document.activeElement;
 396       if (!active) return false;
 397       const dest = this.visibleTaskAtOffset(active, offset);
 398       if (dest !== active && dest instanceof HTMLElement) {
 399         dest.focus();
 400         return true;
 401       }
 402       return false;
 403     },
 404
 405     moveTask: function (offset: number) {
 406       const active = document.activeElement;
 407       if (!active) return;
 408       const dest = this.visibleTaskAtOffset(active, offset);
 409       if (dest === active) return; // Already extremal
 410       var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
 411       if (onePastDest == dest) onePastDest = null; // Will become extremal
 412       if (offset > 0) {
 413         this.setPriority(active, dest, onePastDest);
 414       } else {
 415         this.setPriority(active, onePastDest, dest);
 416       }
 417     },
 418
 419     removeTag: function () {
 420       var target = document.activeElement;
 421       if (!target) return;
 422       if (target.classList.contains("task")) {
 423         const tags = target.getElementsByClassName("tag");
 424         target = tags[tags.length - 1];
 425       }
 426       if (!target || !target.classList.contains("tag")) return;
 427       ui.removeTag(target.parentElement!.getAttribute("data-created")!, target.textContent!);
 428     },
 429
 430     returnFocusAfterInput: function (): boolean {
 431       if (taskFocusedBeforeJumpingToInput) {
 432         taskFocusedBeforeJumpingToInput.focus();
 433         return true;
 434       }
 435       return false;
 436     },
 437
 438     // Change task's priority to be between other tasks a and b.
 439     setPriority: function (task: Element, a: Element | null, b: Element | null) {
 440       const aPriority = a === null ? 0 : Model.getPriority(a);
 441       const bPriority = b === null ? clock.now() : Model.getPriority(b);
 442       console.assert(aPriority < bPriority, aPriority, "<", bPriority);
 443       const span = bPriority - aPriority;
 444       const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
 445       console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
 446       const newPriorityRounded = Math.round(newPriority);
 447       const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
 448       ui.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
 449       task instanceof HTMLElement && task.focus();
 450     },
 451
 452     setState: function (newState: string) {
 453       const task = document.activeElement;
 454       if (!task) return;
 455       const oldState = task.getAttribute("data-state")!;
 456       if (newState === oldState) return;
 457       const createTimestamp = task.getAttribute("data-created")!;
 458       if (currentViewState !== "all" || newState == "deleted") {
 459         this.moveCursor(1) || this.moveCursor(-1);
 460       }
 461       return ui.setState(createTimestamp, newState, oldState);
 462     },
 463
 464     setView: function (state: string, color: string) {
 465       const sheet = (document.getElementById("viewStyle") as HTMLStyleElement).sheet!;
 466       if (state === "all") {
 467         sheet.insertRule(`.task[data-state=deleted] { display: none }`);
 468       } else {
 469         sheet.insertRule(`.task:not([data-state=${state}]) { display: none }`);
 470       }
 471       sheet.insertRule(`:root { --view-state-indicator-color: ${color}; }`);
 472       sheet.removeRule(2);
 473       sheet.removeRule(2);
 474       currentViewState = state;
 475       if (document.activeElement?.getAttribute("data-state") !== state) {
 476         this.firstVisibleTask()?.focus();
 477       }
 478     },
 479
 480     undo: function () {
 481       const ret = ui.undo();
 482       if (ret && ret instanceof HTMLElement) ret.focus();
 483     },
 484     redo: function () {
 485       const ret = ui.redo();
 486       if (ret && ret instanceof HTMLElement) ret.focus();
 487     },
 488   };
 489 }
 490 const browserUI = BrowserUI();
 491
 492 enum InputState {
 493   Root,
 494   S,
 495   V,
 496   VS,
 497 }
 498 var inputState = InputState.Root;
 499 var inputCount: number | null = null;
 500
 501 function handleKey(event: any) {
 502   if (["Alt", "Control", "Meta", "Shift"].includes(event.key)) return;
 503   if (event.target.tagName === "INPUT") {
 504     if (event.target.id === "taskName") {
 505       if (event.key == "Enter") return browserUI.addTask(event);
 506       if (event.key == "Escape") return browserUI.returnFocusAfterInput();
 507     } else if (event.target.classList.contains("tag")) {
 508       if (event.key == "Enter") return browserUI.completeTagEdit(event);
 509       if (event.key == "Escape") return browserUI.completeTagEdit(event, CommitOrAbort.Abort);
 510     } else {
 511       if (event.key == "Enter") return browserUI.completeEdit(event);
 512       if (event.key == "Escape") return browserUI.completeEdit(event, CommitOrAbort.Abort);
 513     }
 514   } else {
 515     if (event.ctrlKey) return; // eg: Don't redo when user refreshes the page with ctrl-R
 516     if (inputState === InputState.Root) {
 517       if ("0" <= event.key && event.key <= "9") {
 518         return (inputCount = (inputCount ?? 0) * 10 + parseInt(event.key));
 519       }
 520       try {
 521         if (event.key == "j") return browserUI.moveCursor(inputCount ?? 1);
 522         if (event.key == "k") return browserUI.moveCursor(-(inputCount ?? 1));
 523         if (event.key == "J") return browserUI.moveTask(inputCount ?? 1);
 524         if (event.key == "K") return browserUI.moveTask(-(inputCount ?? 1));
 525         if (event.key == "G") return browserUI.jumpCursor(inputCount ?? MAX_SAFE_INTEGER);
 526         if (event.key == "T") return browserUI.makeTopPriority();
 527         if (event.key == "n") return browserUI.focusTaskNameInput(event);
 528         if (event.key == "c") return browserUI.setState("cancelled");
 529         if (event.key == "d") return browserUI.setState("done");
 530         if (event.key == "q") return browserUI.setState("todo");
 531         if (event.key == "s") return (inputState = InputState.S);
 532         if (event.key == "w") return browserUI.setState("waiting");
 533         if (event.key == "X") return browserUI.setState("deleted");
 534         if (event.key == "x") return browserUI.removeTag();
 535         if (event.key == "u") return browserUI.undo();
 536         if (event.key == "r") return browserUI.redo();
 537         if (event.key == "e") return browserUI.beginEdit(event);
 538         if (event.key == "t") return browserUI.beginTagEdit(event);
 539         if (event.key == "v") return (inputState = InputState.V);
 540       } finally {
 541         inputCount = null;
 542       }
 543     } else if (inputState === InputState.S) {
 544       inputState = InputState.Root;
 545       if (event.key == "m") return browserUI.setState("someday-maybe");
 546     } else if (inputState === InputState.V) {
 547       inputState = InputState.Root;
 548       if (event.key == "a") return browserUI.setView("all", "Gold");
 549       if (event.key == "c") return browserUI.setView("cancelled", "Red");
 550       if (event.key == "d") return browserUI.setView("done", "LawnGreen");
 551       if (event.key == "q") return browserUI.setView("todo", "White");
 552       if (event.key == "s") return (inputState = InputState.VS);
 553       if (event.key == "v") return browserUI.setView("todo", "White");
 554       if (event.key == "w") return browserUI.setView("waiting", "MediumOrchid");
 555       if (event.key == "x") return browserUI.setView("deleted", "Black");
 556     } else if (inputState === InputState.VS) {
 557       inputState = InputState.Root;
 558       if (event.key == "m") return browserUI.setView("someday-maybe", "DeepSkyBlue");
 559     }
 560   }
 561 }
 562
 563 function browserInit() {
 564   log.replay();
 565   browserUI.firstVisibleTask()?.focus();
 566   document.body.addEventListener("keydown", handleKey, { capture: false });
 567 }