return at === -1 ? [str] : [str.substring(0, at)].concat(splitN(str.substring(at + delimiter.length), delimiter, limit - 1));
}
+// 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");
- task.appendChild(document.createTextNode(description));
- task.setAttribute("class", "task");
+ 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);
- task.focus();
return task;
},
- destroyTask: function (createTimestamp: string) {
+ addTag: function (createTimestamp: string, tagName: string): Element | null {
const task = this.getTask(createTimestamp);
- if (task) {
- task.parentElement!.removeChild(task);
+ 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 {
}
},
- setPriority: function (createTimestamp: string, priority: number) {
+ 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;
+ 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);
- target instanceof HTMLElement && target.focus();
- return;
+ return target;
}
}
document.getElementById("tasks")!.appendChild(target);
- target instanceof HTMLElement && target.focus();
+ return target;
},
setState: function (stateTimestamp: string, createTimestamp: string, state: string) {
const task = this.getTask(createTimestamp);
if (task) {
- task.setAttribute(`data-${state}`, stateTimestamp);
- if (task instanceof HTMLElement) {
- task.style.display = "none"; // Until view filtering
- }
+ task.setAttribute("data-state", state);
}
},
};
if (command == "Create") {
return Model.addTask(timestamp, data);
}
- if (command == "Destroy") {
- return Model.destroyTask(data.split(" ", 1)[0]);
+ if (command == "Edit") {
+ const [createTimestamp, description] = splitN(data, " ", 1);
+ return Model.edit(createTimestamp, description);
+ }
+ if (command == "Priority") {
+ const [createTimestamp, newPriority] = splitN(data, " ", 1);
+ return Model.setPriority(createTimestamp, parseFloat(newPriority));
}
if (command == "State") {
const [createTimestamp, state] = splitN(data, " ", 1);
return Model.setState(timestamp, createTimestamp, state);
}
- if (command == "Priority") {
- const [createTimestamp, newPriority] = splitN(data, " ", 1);
- return Model.setPriority(createTimestamp, parseFloat(newPriority));
+ if (command == "Tag") {
+ const [createTimestamp, tag] = splitN(data, " ", 1);
+ return Model.addTag(createTimestamp, tag);
+ }
+ if (command == "Untag") {
+ const [createTimestamp, tag] = splitN(data, " ", 1);
+ return Model.removeTag(createTimestamp, tag);
}
},
}
const log = Log();
-const UI = {
- addTask: function (description: string): Element {
- return <Element>log.recordAndApply(`${Date.now()} Create ${description}`);
- },
- destroyTask: function (createTimestamp: string) {
- return log.recordAndApply(`${Date.now()} Destroy ${createTimestamp} ${Model.getTask(createTimestamp)?.textContent}`);
- },
- setPriority: function (createTimestamp: string, priority: number) {
- return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${priority}`);
- },
- setState: function (createTimestamp: string, state: string) {
- return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`);
- },
-};
+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()} ${undoLog.pop()}`);
+ }
+ },
+ };
+}
+const ui = UI();
-const BrowserUI = {
- addTask: function () {
- const input = <HTMLInputElement>document.getElementById("taskName");
- if (input.value) {
- const task = UI.addTask(input.value);
+enum CommitOrAbort {
+ Commit,
+ Abort,
+}
+
+function BrowserUI() {
+ var currentViewState = "todo";
+ var taskFocusedBeforeJumpingToInput: HTMLElement | null = null;
+ var lastTagNameEntered = "";
+ return {
+ addTask: function (event: KeyboardEvent) {
+ const input = <HTMLInputElement>document.getElementById("taskName");
+ if (input.value.match(/^ *$/)) 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);
+ }
+ },
- destroyTask: function () {
- const createTimestamp = document.activeElement?.getAttribute("data-created");
- this.moveCursor(1) || this.moveCursor(-1);
- return UI.destroyTask(createTimestamp!);
- },
+ 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();
+ },
- focusTaskNameInput: function (event: any) {
- document.getElementById("taskName")!.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();
+ },
- 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.style.display !== "none") {
- offset -= increment;
- valid_cursor = cursor;
- }
- if (Math.abs(offset) < 0.5) break;
- }
- return valid_cursor;
- },
+ 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(/^ *$/) || newDescription === oldDescription) {
+ desc.textContent = oldDescription;
+ } else {
+ ui.edit(task.getAttribute("data-created")!, newDescription, oldDescription);
+ }
+ },
- moveCursor: function (offset: number): boolean {
- const active = document.activeElement;
- if (!active) return false;
- const dest = this.visibleTaskAtOffset(active, offset);
- if (dest !== active && dest instanceof HTMLElement) {
- dest.focus();
- return true;
- }
- return false;
- },
+ completeTagEdit: function (event: Event, resolution: CommitOrAbort = CommitOrAbort.Commit) {
+ const input = event.target as HTMLInputElement;
+ const task = input.parentElement!;
+ const newTagName = input.value;
+ input.removeEventListener("blur", this.completeTagEdit);
+ task.removeChild(input);
+ task.focus();
+ if (resolution === CommitOrAbort.Commit && !newTagName.match(/^ *$/) && !Model.hasTag(task, newTagName)) {
+ ui.addTag(task.getAttribute("data-created")!, newTagName);
+ lastTagNameEntered = newTagName;
+ }
+ },
- 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);
- }
- },
+ firstVisibleTask: function () {
+ for (const task of document.getElementsByClassName("task")) {
+ if (task instanceof HTMLElement && task.getAttribute("data-state") === currentViewState) {
+ return task;
+ }
+ }
+ },
- // 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 ? Date.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);
- },
+ focusTaskNameInput: function (event: Event) {
+ if (document.activeElement instanceof HTMLElement) {
+ taskFocusedBeforeJumpingToInput = document.activeElement;
+ }
+ document.getElementById("taskName")!.focus();
+ event.preventDefault();
+ },
- setState: function (state: string) {
- const createTimestamp = document.activeElement?.getAttribute("data-created");
- this.moveCursor(1) || this.moveCursor(-1);
- return UI.setState(createTimestamp!, state);
- },
-};
+ 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.key == "Enter") return BrowserUI.addTask();
+ 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 (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 == "s") return BrowserUI.setState("someday-maybe");
- if (event.key == "w") return BrowserUI.setState("waiting");
- if (event.key == "d") return BrowserUI.setState("done");
- if (event.key == "c") return BrowserUI.setState("cancelled");
- if (event.key == "X") return BrowserUI.destroyTask();
+ 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() {
- document.body.addEventListener("keydown", handleKey, { capture: false });
log.replay();
+ browserUI.firstVisibleTask()?.focus();
+ document.body.addEventListener("keydown", handleKey, { capture: false });
}
projects / vopamoi / blobdiff