-var tasks = [];
+// Typescript doesn't know about MAX_SAFE_INTEGER?? This was supposed to be
+// fixed in typescript 2.0.1 in 2016, but is not working for me in typescript
+// 4.2.4 in 2022. :( https://github.com/microsoft/TypeScript/issues/9937
+//const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER;
+const MAX_SAFE_INTEGER = 9007199254740991;
-function addTask(task: string) {
- tasks.push(task);
+// A sane split that splits N *times*, leaving the last chunk unsplit.
+function splitN(str: string, delimiter: string, limit: number = MAX_SAFE_INTEGER): string[] {
+ if (limit < 1) {
+ return [str];
+ }
+ const at = str.indexOf(delimiter);
+ return at === -1 ? [str] : [str.substring(0, at)].concat(splitN(str.substring(at + delimiter.length), delimiter, limit - 1));
}
-function browserCreateTask(form: any) {
- addTask(form.taskName.value);
- form.taskName.value = "";
- return false;
+// A clock that never goes backwards; monotonic.
+function Clock() {
+ var previousNow = Date.now();
+ return {
+ now: function (): number {
+ const now = Date.now();
+ if (now > previousNow) {
+ previousNow = now;
+ return now;
+ }
+ return ++previousNow;
+ },
+ };
+}
+const clock = Clock();
+
+// Returns a promise for a hue based on a hash of the string
+function hashHue(str: string) {
+ // Using crypto for this is overkill
+ return crypto.subtle.digest("SHA-256", new TextEncoder().encode(str)).then((buf) => (new Uint16Array(buf)[0] * 360) / 2 ** 16);
+}
+
+const Model = {
+ addTask: function (timestamp: string, description: string): Element {
+ const task = document.createElement("div");
+ const desc = document.createElement("span");
+ desc.textContent = description;
+ desc.classList.add("desc");
+ task.appendChild(desc);
+ task.classList.add("task");
+ task.setAttribute("tabindex", "0");
+ task.setAttribute("data-created", timestamp);
+ task.setAttribute("data-state", "todo");
+ document.getElementById("tasks")!.appendChild(task);
+ return task;
+ },
+
+ addTag: function (createTimestamp: string, tagName: string): Element | null {
+ const task = this.getTask(createTimestamp);
+ if (!task) return null;
+ const existingTag = this.hasTag(task, tagName);
+ if (existingTag) return existingTag;
+ const tag = document.createElement("span");
+ tag.appendChild(document.createTextNode(tagName));
+ tag.classList.add("tag");
+ tag.setAttribute("tabindex", "0");
+ hashHue(tagName).then((hue) => (tag.style.backgroundColor = `hsl(${hue},90%,45%)`));
+ for (const child of task.getElementsByClassName("tag")) {
+ if (tagName > child.textContent!) {
+ task.insertBefore(tag, child);
+ return tag;
+ }
+ }
+ task.appendChild(tag);
+ return tag;
+ },
+
+ edit: function (createTimestamp: string, newDescription: string): Element | null {
+ const target = this.getTask(createTimestamp);
+ if (!target) return null;
+ if (target.hasAttribute("data-description")) {
+ // Oh no: An edit has arrived from a replica while a local edit is in progress.
+ const input = target.firstChild as HTMLInputElement;
+ if (
+ input.value === target.getAttribute("data-description") &&
+ input.selectionStart === input.value.length &&
+ input.selectionEnd === input.value.length
+ ) {
+ // No local changes have actually been made yet. Change the contents of the edit box!
+ input.value = newDescription;
+ } else {
+ // No great options.
+ // Prefer not to interrupt the local user's edit.
+ // The remote edit is mostly lost; this mostly becomes last-write-wins.
+ target.setAttribute("data-description", newDescription);
+ }
+ } else {
+ target.getElementsByClassName("desc")[0].textContent = newDescription;
+ }
+ return target;
+ },
+
+ hasTag: function (task: Element, tag: string): Element | null {
+ for (const child of task.getElementsByClassName("tag")) {
+ if (child.textContent === tag) {
+ return child;
+ }
+ }
+ return null;
+ },
+
+ getPriority: function (task: Element): number {
+ if (task.hasAttribute("data-priority")) {
+ return parseFloat(task.getAttribute("data-priority")!);
+ }
+ return parseFloat(task.getAttribute("data-created")!);
+ },
+
+ getTask: function (createTimestamp: string) {
+ for (const task of document.getElementsByClassName("task")) {
+ if (task.getAttribute("data-created") === createTimestamp) {
+ return task;
+ }
+ }
+ },
+
+ removeTag: function (createTimestamp: string, tagName: string) {
+ const task = this.getTask(createTimestamp);
+ if (!task) return null;
+ const tag = this.hasTag(task, tagName);
+ if (!tag) return;
+ task.removeChild(tag);
+ if (task instanceof HTMLElement) task.focus();
+ },
+
+ setPriority: function (createTimestamp: string, priority: number): Element | null {
+ const target = this.getTask(createTimestamp);
+ if (!target) return null;
+ target.setAttribute("data-priority", `${priority}`);
+ for (const task of document.getElementsByClassName("task")) {
+ if (task !== target && this.getPriority(task) > priority) {
+ task.parentElement!.insertBefore(target, task);
+ return target;
+ }
+ }
+ document.getElementById("tasks")!.appendChild(target);
+ return target;
+ },
+
+ setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
+ const task = this.getTask(createTimestamp);
+ if (task) {
+ task.setAttribute("data-state", state);
+ }
+ },
+};
+
+function Log(prefix: string = "vp-") {
+ var next_log_index = 0;
+ return {
+ apply: function (entry: string) {
+ const [timestamp, command, data] = splitN(entry, " ", 2);
+ if (command == "Create") {
+ return Model.addTask(timestamp, data);
+ }
+ if (command == "Edit") {
+ const [createTimestamp, description] = splitN(data, " ", 1);
+ return Model.edit(createTimestamp, description);
+ }
+ if (command == "Priority") {
+ const [createTimestamp, newPriority] = splitN(data, " ", 1);
+ return Model.setPriority(createTimestamp, parseFloat(newPriority));
+ }
+ if (command == "State") {
+ const [createTimestamp, state] = splitN(data, " ", 1);
+ return Model.setState(timestamp, createTimestamp, state);
+ }
+ if (command == "Tag") {
+ const [createTimestamp, tag] = splitN(data, " ", 1);
+ return Model.addTag(createTimestamp, tag);
+ }
+ if (command == "Untag") {
+ const [createTimestamp, tag] = splitN(data, " ", 1);
+ return Model.removeTag(createTimestamp, tag);
+ }
+ },
+
+ record: function (entry: string) {
+ window.localStorage.setItem(`${prefix}${next_log_index++}`, entry);
+ },
+
+ recordAndApply: function (entry: string) {
+ this.record(entry);
+ return this.apply(entry);
+ },
+
+ replay: function () {
+ while (true) {
+ const entry = window.localStorage.getItem(`${prefix}${next_log_index}`);
+ if (entry === null) {
+ break;
+ }
+ this.apply(entry);
+ next_log_index++;
+ }
+ },
+ };
+}
+const log = Log();
+
+function UI() {
+ const undoLog: string[] = [];
+ return {
+ addTask: function (description: string): Element {
+ const now = clock.now();
+ undoLog.push(`State ${now} deleted`);
+ return <Element>log.recordAndApply(`${now} Create ${description}`);
+ },
+ addTag: function (createTimestamp: string, tag: string) {
+ undoLog.push(`Untag ${createTimestamp} ${tag}`);
+ return log.recordAndApply(`${clock.now()} Tag ${createTimestamp} ${tag}`);
+ },
+ edit: function (createTimestamp: string, newDescription: string, oldDescription: string) {
+ undoLog.push(`Edit ${createTimestamp} ${oldDescription}`);
+ return log.recordAndApply(`${clock.now()} Edit ${createTimestamp} ${newDescription}`);
+ },
+ removeTag: function (createTimestamp: string, tag: string) {
+ undoLog.push(`Tag ${createTimestamp} ${tag}`);
+ return log.recordAndApply(`${clock.now()} Untag ${createTimestamp} ${tag}`);
+ },
+ setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
+ undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
+ return log.recordAndApply(`${clock.now()} Priority ${createTimestamp} ${newPriority}`);
+ },
+ setState: function (createTimestamp: string, newState: string, oldState: string) {
+ undoLog.push(`State ${createTimestamp} ${oldState}`);
+ return log.recordAndApply(`${clock.now()} State ${createTimestamp} ${newState}`);
+ },
+ undo: function () {
+ if (undoLog.length > 0) {
+ return log.recordAndApply(`${clock.now()} ${undoLog.pop()}`);
+ }
+ },
+ };
+}
+const ui = UI();
+
+enum CommitOrAbort {
+ Commit,
+ Abort,
+}
+
+function BrowserUI() {
+ var currentViewState = "todo";
+ var taskFocusedBeforeJumpingToInput: HTMLElement | null = null;
+ var lastTagNameEntered = "";
+ return {
+ addTask: function (event: KeyboardEvent) {
+ const input = <HTMLInputElement>document.getElementById("taskName");
+ if (input.value.match(/^ *$/)) return;
+ const task = ui.addTask(input.value);
+ if (currentViewState === "todo") {
+ task instanceof HTMLElement && task.focus();
+ } else if (this.returnFocusAfterInput()) {
+ } else {
+ this.firstVisibleTask()?.focus();
+ }
+ input.value = "";
+ if (event.getModifierState("Control")) {
+ this.makeTopPriority(task);
+ }
+ },
+
+ beginEdit: function (event: Event) {
+ const task = document.activeElement;
+ if (!task) return;
+ const input = document.createElement("input");
+ const desc = task.getElementsByClassName("desc")[0];
+ const oldDescription = desc.textContent!;
+ task.setAttribute("data-description", oldDescription);
+ input.value = oldDescription;
+ input.addEventListener("blur", this.completeEdit, { once: true });
+ desc.textContent = "";
+ task.insertBefore(input, task.firstChild);
+ input.focus();
+ event.preventDefault();
+ },
+
+ beginTagEdit: function (event: Event) {
+ const task = document.activeElement;
+ if (!task) return;
+ const input = document.createElement("input");
+ input.classList.add("tag");
+ input.addEventListener("blur", this.completeTagEdit, { once: true });
+ input.value = lastTagNameEntered;
+ task.appendChild(input);
+ input.focus();
+ input.select();
+ event.preventDefault();
+ },
+
+ completeEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
+ const input = event.target as HTMLInputElement;
+ const task = input.parentElement!;
+ const desc = task.getElementsByClassName("desc")[0];
+ const oldDescription = task.getAttribute("data-description")!;
+ const newDescription = input.value;
+ input.removeEventListener("blur", this.completeEdit);
+ task.removeChild(input);
+ task.removeAttribute("data-description");
+ task.focus();
+ if (resolution === CommitOrAbort.Abort || newDescription.match(/^ *$/) || newDescription === oldDescription) {
+ desc.textContent = oldDescription;
+ } else {
+ ui.edit(task.getAttribute("data-created")!, newDescription, oldDescription);
+ }
+ },
+
+ completeTagEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
+ const input = event.target as HTMLInputElement;
+ const task = input.parentElement!;
+ const newTagName = input.value;
+ input.removeEventListener("blur", this.completeTagEdit);
+ task.removeChild(input);
+ task.focus();
+ if (resolution === CommitOrAbort.Commit && !newTagName.match(/^ *$/) && !Model.hasTag(task, newTagName)) {
+ ui.addTag(task.getAttribute("data-created")!, newTagName);
+ lastTagNameEntered = newTagName;
+ }
+ },
+
+ firstVisibleTask: function () {
+ for (const task of document.getElementsByClassName("task")) {
+ if (task instanceof HTMLElement && task.getAttribute("data-state") === currentViewState) {
+ return task;
+ }
+ }
+ },
+
+ focusTaskNameInput: function (event: Event) {
+ if (document.activeElement instanceof HTMLElement) {
+ taskFocusedBeforeJumpingToInput = document.activeElement;
+ }
+ document.getElementById("taskName")!.focus();
+ event.preventDefault();
+ },
+
+ visibleTaskAtOffset(task: Element, offset: number): Element {
+ var cursor: Element | null = task;
+ var valid_cursor = cursor;
+ const increment = offset / Math.abs(offset);
+ while (true) {
+ cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
+ if (!cursor || !(cursor instanceof HTMLElement)) break;
+ if (cursor.getAttribute("data-state")! === currentViewState) {
+ offset -= increment;
+ valid_cursor = cursor;
+ }
+ if (Math.abs(offset) < 0.5) break;
+ }
+ return valid_cursor;
+ },
+
+ makeTopPriority: function (task: Element) {
+ this.setPriority(task, null, document.getElementsByClassName("task")[0]);
+ },
+
+ moveCursor: function (offset: number): boolean {
+ const active = document.activeElement;
+ if (!active) return false;
+ const dest = this.visibleTaskAtOffset(active, offset);
+ if (dest !== active && dest instanceof HTMLElement) {
+ dest.focus();
+ return true;
+ }
+ return false;
+ },
+
+ moveTask: function (offset: number) {
+ const active = document.activeElement;
+ if (!active) return;
+ const dest = this.visibleTaskAtOffset(active, offset);
+ if (dest === active) return; // Already extremal
+ var onePastDest: Element | null = this.visibleTaskAtOffset(dest, offset / Math.abs(offset));
+ if (onePastDest == dest) onePastDest = null; // Will become extremal
+ if (offset > 0) {
+ this.setPriority(active, dest, onePastDest);
+ } else {
+ this.setPriority(active, onePastDest, dest);
+ }
+ },
+
+ removeTag: function () {
+ var target = document.activeElement;
+ if (!target) return;
+ if (target.classList.contains("task")) {
+ const tags = target.getElementsByClassName("tag");
+ target = tags[tags.length - 1];
+ }
+ if (!target || !target.classList.contains("tag")) return;
+ ui.removeTag(target.parentElement!.getAttribute("data-created")!, target.textContent!);
+ },
+
+ returnFocusAfterInput: function (): boolean {
+ if (taskFocusedBeforeJumpingToInput) {
+ taskFocusedBeforeJumpingToInput.focus();
+ return true;
+ }
+ return false;
+ },
+
+ // Change task's priority to be between other tasks a and b.
+ setPriority: function (task: Element, a: Element | null, b: Element | null) {
+ const aPriority = a === null ? 0 : Model.getPriority(a);
+ const bPriority = b === null ? clock.now() : Model.getPriority(b);
+ console.assert(aPriority < bPriority, aPriority, "<", bPriority);
+ const span = bPriority - aPriority;
+ const newPriority = aPriority + 0.1 * span + 0.8 * span * Math.random();
+ console.assert(aPriority < newPriority && newPriority < bPriority, aPriority, "<", newPriority, "<", bPriority);
+ const newPriorityRounded = Math.round(newPriority);
+ const okToRound = aPriority < newPriorityRounded && newPriorityRounded < bPriority;
+ ui.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task));
+ task instanceof HTMLElement && task.focus();
+ },
+
+ setState: function (newState: string) {
+ const task = document.activeElement;
+ if (!task) return;
+ const oldState = task.getAttribute("data-state")!;
+ if (newState === oldState) return;
+ const createTimestamp = task.getAttribute("data-created")!;
+ this.moveCursor(1) || this.moveCursor(-1);
+ return ui.setState(createTimestamp, newState, oldState);
+ },
+
+ setView: function (state: string, color: string) {
+ const sheet = (document.getElementById("viewStyle") as HTMLStyleElement).sheet!;
+ sheet.insertRule(`.task:not([data-state=${state}]) { display: none }`);
+ sheet.insertRule(`:root { --view-state-indicator-color: ${color}; }`);
+ sheet.removeRule(2);
+ sheet.removeRule(2);
+ currentViewState = state;
+ if (document.activeElement?.getAttribute("data-state") !== state) {
+ this.firstVisibleTask()?.focus();
+ }
+ },
+
+ undo: function () {
+ const ret = ui.undo();
+ if (ret && ret instanceof HTMLElement) ret.focus();
+ },
+ };
+}
+const browserUI = BrowserUI();
+
+enum InputState {
+ Command,
+ View,
+}
+var inputState = InputState.Command;
+
+function handleKey(event: any) {
+ if (event.target.tagName === "INPUT") {
+ if (event.target.id === "taskName") {
+ if (event.key == "Enter") return browserUI.addTask(event);
+ if (event.key == "Escape") return browserUI.returnFocusAfterInput();
+ } else if (event.target.classList.contains("tag")) {
+ if (event.key == "Enter") return browserUI.completeTagEdit(event);
+ if (event.key == "Escape") return browserUI.completeTagEdit(event, CommitOrAbort.Abort);
+ } else {
+ if (event.key == "Enter") return browserUI.completeEdit(event);
+ if (event.key == "Escape") return browserUI.completeEdit(event, CommitOrAbort.Abort);
+ }
+ } else {
+ if (inputState === InputState.Command) {
+ if (event.key == "j") return browserUI.moveCursor(1);
+ if (event.key == "k") return browserUI.moveCursor(-1);
+ if (event.key == "J") return browserUI.moveTask(1);
+ if (event.key == "K") return browserUI.moveTask(-1);
+ if (event.key == "n") return browserUI.focusTaskNameInput(event);
+ if (event.key == "c") return browserUI.setState("cancelled");
+ if (event.key == "d") return browserUI.setState("done");
+ if (event.key == "q") return browserUI.setState("todo");
+ if (event.key == "s") return browserUI.setState("someday-maybe");
+ if (event.key == "w") return browserUI.setState("waiting");
+ if (event.key == "X") return browserUI.setState("deleted");
+ if (event.key == "x") return browserUI.removeTag();
+ if (event.key == "u") return browserUI.undo();
+ if (event.key == "e") return browserUI.beginEdit(event);
+ if (event.key == "t") return browserUI.beginTagEdit(event);
+ if (event.key == "v") return (inputState = InputState.View);
+ } else if (inputState === InputState.View) {
+ inputState = InputState.Command;
+ if (event.key == "c") return browserUI.setView("cancelled", "Red");
+ if (event.key == "d") return browserUI.setView("done", "LawnGreen");
+ if (event.key == "q") return browserUI.setView("todo", "White");
+ if (event.key == "s") return browserUI.setView("someday-maybe", "DeepSkyBlue");
+ if (event.key == "v") return browserUI.setView("todo", "White");
+ if (event.key == "w") return browserUI.setView("waiting", "MediumOrchid");
+ if (event.key == "x") return browserUI.setView("deleted", "Black");
+ }
+ }
+}
+
+function browserInit() {
+ log.replay();
+ browserUI.firstVisibleTask()?.focus();
+ document.body.addEventListener("keydown", handleKey, { capture: false });
}
projects / vopamoi / blobdiff