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();
+
const Model = {
addTask: function (timestamp: string, description: string): Element {
const task = document.createElement("div");
task.setAttribute("class", "task");
task.setAttribute("tabindex", "0");
task.setAttribute("data-created", timestamp);
+ task.setAttribute("data-state", "todo");
document.getElementById("tasks")!.appendChild(task);
- task.focus();
return task;
},
+ 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.children[0] as HTMLInputElement;
+ if (
+ input.value === target.getAttribute("data-description") &&
+ input.selectionStart === 0 &&
+ input.selectionEnd === input.value.length
+ ) {
+ // No local changes have actually been made yet. Change the contents of the edit box!
+ input.value = newDescription;
+ input.select();
+ } 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.textContent = newDescription;
+ }
+ return target;
+ },
+
getPriority: function (task: Element): number {
if (task.hasAttribute("data-priority")) {
return parseFloat(task.getAttribute("data-priority")!);
return parseFloat(task.getAttribute("data-created")!);
},
- getState: function (task: Element): string {
- return task.getAttribute("data-state") ?? "todo";
- },
-
getTask: function (createTimestamp: string) {
for (const task of document.getElementsByClassName("task")) {
if (task.getAttribute("data-created") === createTimestamp) {
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 target;
}
}
document.getElementById("tasks")!.appendChild(target);
- target instanceof HTMLElement && target.focus();
return target;
},
const task = this.getTask(createTimestamp);
if (task) {
task.setAttribute("data-state", state);
- if (task instanceof HTMLElement) {
- task.style.display = state == "todo" ? "block" : "none"; // Until view filtering
- }
}
},
};
if (command == "Create") {
return Model.addTask(timestamp, data);
}
+ if (command == "Edit") {
+ const [createTimestamp, description] = splitN(data, " ", 1);
+ return Model.edit(createTimestamp, description);
+ }
if (command == "State") {
const [createTimestamp, state] = splitN(data, " ", 1);
return Model.setState(timestamp, createTimestamp, state);
const UI = {
addTask: function (description: string): Element {
- const now = Date.now();
+ const now = clock.now();
undoLog.push(`State ${now} deleted`);
return <Element>log.recordAndApply(`${now} Create ${description}`);
},
+ edit: function (createTimestamp: string, newDescription: string, oldDescription: string) {
+ undoLog.push(`Edit ${createTimestamp} ${oldDescription}`);
+ return log.recordAndApply(`${clock.now()} Edit ${createTimestamp} ${newDescription}`);
+ },
setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) {
undoLog.push(`Priority ${createTimestamp} ${oldPriority}`);
- return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${newPriority}`);
+ return log.recordAndApply(`${clock.now()} Priority ${createTimestamp} ${newPriority}`);
},
setState: function (createTimestamp: string, newState: string, oldState: string) {
undoLog.push(`State ${createTimestamp} ${oldState}`);
- return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${newState}`);
+ return log.recordAndApply(`${clock.now()} State ${createTimestamp} ${newState}`);
},
undo: function () {
if (undoLog.length > 0) {
- return log.recordAndApply(`${Date.now()} ${undoLog.pop()}`);
+ return log.recordAndApply(`${clock.now()} ${undoLog.pop()}`);
}
},
};
-const BrowserUI = {
- addTask: function (event: KeyboardEvent) {
- const input = <HTMLInputElement>document.getElementById("taskName");
- if (input.value) {
- const task = UI.addTask(input.value);
- input.value = "";
- if (event.getModifierState("Control")) {
- this.setPriority(task, null, document.getElementsByClassName("task")[0]);
+function BrowserUI() {
+ var currentViewState = "todo";
+ return {
+ addTask: function (event: KeyboardEvent) {
+ const input = <HTMLInputElement>document.getElementById("taskName");
+ if (input.value) {
+ const task = UI.addTask(input.value);
+ if (task && task instanceof HTMLElement) task.focus();
+ input.value = "";
+ if (event.getModifierState("Control")) {
+ this.setPriority(task, null, document.getElementsByClassName("task")[0]);
+ }
}
- }
- },
+ },
- firstVisibleTask: function () {
- for (const task of document.getElementsByClassName("task")) {
- if (task instanceof HTMLElement && task.style.display !== "none") {
- return task;
+ beginEdit: function (event: Event) {
+ const task = document.activeElement;
+ if (!task) return;
+ const input = document.createElement("input");
+ const oldDescription = task.textContent!;
+ task.setAttribute("data-description", oldDescription);
+ input.value = oldDescription;
+ input.addEventListener("blur", this.completeEdit, { once: true });
+ task.textContent = "";
+ task.appendChild(input);
+ input.focus();
+ input.select();
+ event.preventDefault();
+ },
+
+ completeEdit: function (event: Event) {
+ const input = event.target as HTMLInputElement;
+ const task = input.parentElement!;
+ const oldDescription = task.getAttribute("data-description")!;
+ const newDescription = input.value;
+ input.removeEventListener("blur", this.completeEdit);
+ task.removeChild(task.children[0]);
+ task.removeAttribute("data-description");
+ task.focus();
+ if (newDescription === oldDescription) {
+ task.textContent = oldDescription;
+ } else {
+ UI.edit(task.getAttribute("data-created")!, newDescription, oldDescription);
}
- }
- },
+ },
- focusTaskNameInput: function (event: Event) {
- document.getElementById("taskName")!.focus();
- event.preventDefault();
- },
+ firstVisibleTask: function () {
+ for (const task of document.getElementsByClassName("task")) {
+ if (task instanceof HTMLElement && task.getAttribute("data-state") === currentViewState) {
+ return task;
+ }
+ }
+ },
- 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;
- },
+ focusTaskNameInput: function (event: Event) {
+ document.getElementById("taskName")!.focus();
+ event.preventDefault();
+ },
- 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;
- },
+ 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;
+ },
- 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);
- }
- },
+ 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;
+ },
- // 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, Model.getPriority(task));
- },
+ 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);
+ }
+ },
- setState: function (state: string) {
- const task = document.activeElement;
- if (!task) return;
- const createTimestamp = task.getAttribute("data-created")!;
- this.moveCursor(1) || this.moveCursor(-1);
- return UI.setState(createTimestamp, state, Model.getState(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 ? 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();
+ },
- undo: function () {
- const ret = UI.undo();
- if (ret && ret instanceof HTMLElement) ret.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) {
+ const sheet = (document.getElementById("viewStyle") as HTMLStyleElement).sheet!;
+ sheet.insertRule(`.task:not([data-state=${state}]) { display: none }`);
+ sheet.removeRule(1);
+ 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(event);
+ if (event.target.id === "taskName") {
+ if (event.key == "Enter") return browserUI.addTask(event);
+ } else {
+ if (event.key == "Enter") return browserUI.completeEdit(event);
+ }
} 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.setState("deleted");
- if (event.key == "u") return BrowserUI.undo();
+ 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 == "s") return browserUI.setState("someday-maybe");
+ if (event.key == "t") return browserUI.setState("todo");
+ if (event.key == "w") return browserUI.setState("waiting");
+ if (event.key == "X") return browserUI.setState("deleted");
+ if (event.key == "u") return browserUI.undo();
+ if (event.key == "e") return browserUI.beginEdit(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");
+ if (event.key == "d") return browserUI.setView("done");
+ if (event.key == "s") return browserUI.setView("someday-maybe");
+ if (event.key == "t") return browserUI.setView("todo");
+ if (event.key == "w") return browserUI.setView("waiting");
+ if (event.key == "x") return browserUI.setView("deleted");
+ }
}
}
function browserInit() {
document.body.addEventListener("keydown", handleKey, { capture: false });
log.replay();
- BrowserUI.firstVisibleTask()?.focus();
+ browserUI.firstVisibleTask()?.focus();
}
projects / vopamoi / blobdiff