X-Git-Url: http://git.scottworley.com/vopamoi/blobdiff_plain/f1b121ab0699da579cd8de7f5a0c891c2389f549..1804fd5af88aa31a9fc2847492480609dc592c77:/vopamoi.ts?ds=inline diff --git a/vopamoi.ts b/vopamoi.ts index a3f6ce4..bdc8b0d 100644 --- a/vopamoi.ts +++ b/vopamoi.ts @@ -1,46 +1,657 @@ +// 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; + +// 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)); +} + +// 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 = { - createTask: function (description: string) { + addTask: function (timestamp: string, description: string): Element { const task = document.createElement("div"); - task.appendChild(document.createTextNode(description)); + 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"); + const tasks = document.getElementById("tasks")!; + tasks.insertBefore(task, tasks.firstElementChild); return task; }, - addTask: function (description: string) { - document.body.appendChild(this.createTask(description)).focus(); + 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.insertBefore(tag, task.getElementsByClassName("desc")[0]!); + 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.getElementsByTagName("input")[0]!; + 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; + } + } + }, + + insertInPriorityOrder: function (task: Element, dest: Element) { + const priority = this.getPriority(task); + for (const t of dest.children) { + if (t !== task && this.getPriority(t) < priority) { + dest.insertBefore(task, t); + return; + } + } + dest.appendChild(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}`); + this.insertInPriorityOrder(target, target.parentElement!); + return target; }, - moveCursor: function (offset: number) { - var active = document.activeElement; - if (offset === 1 && active) { - active = active.nextElementSibling; + setState: function (stateTimestamp: string, createTimestamp: string, state: string) { + const task = this.getTask(createTimestamp); + if (!task) return; + task.setAttribute("data-state", state); + var date = task.getElementsByClassName("statedate")[0]; + if (state === "todo") { + task.removeChild(date); + return; } - if (offset === -1 && active) { - active = active.previousElementSibling; + if (!date) { + date = document.createElement("span"); + date.classList.add("statedate"); + task.insertBefore(date, task.firstChild); } - if (active && active instanceof HTMLElement) active.focus(); + const d = new Date(parseInt(stateTimestamp)); + date.textContent = `${d.getFullYear()}-${`${d.getMonth() + 1}`.padStart(2, "0")}-${`${d.getDate()}`.padStart(2, "0")}`; }, }; -function handleKey(event: any) { - if (event.target.tagName !== "INPUT") { - if (event.key == "j") Model.moveCursor(1); - if (event.key == "k") Model.moveCursor(-1); - if (event.key == "c") { +function Log(prefix: string = "vp-") { + var next_log_index = 0; + return { + apply: function (entry: string) { + const [timestamp, command, data] = splitN(entry, " ", 2); + if (command == "Create") { + return Model.addTask(timestamp, data); + } + if (command == "Edit") { + const [createTimestamp, description] = splitN(data, " ", 1); + return Model.edit(createTimestamp, description); + } + if (command == "Priority") { + const [createTimestamp, newPriority] = splitN(data, " ", 1); + return Model.setPriority(createTimestamp, parseFloat(newPriority)); + } + if (command == "State") { + const [createTimestamp, state] = splitN(data, " ", 1); + return Model.setState(timestamp, createTimestamp, state); + } + if (command == "Tag") { + const [createTimestamp, tag] = splitN(data, " ", 1); + return Model.addTag(createTimestamp, tag); + } + if (command == "Untag") { + const [createTimestamp, tag] = splitN(data, " ", 1); + return Model.removeTag(createTimestamp, tag); + } + }, + + record: function (entry: string) { + window.localStorage.setItem(`${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}${next_log_index}`); + if (entry === null) { + break; + } + this.apply(entry); + next_log_index++; + } + }, + }; +} +const log = Log(); + +function UI() { + const undoLog: string[][] = []; + const redoLog: string[][] = []; + function perform(forward: string, reverse: string) { + undoLog.push([reverse, forward]); + return log.recordAndApply(`${clock.now()} ${forward}`); + } + return { + addTask: function (description: string): Element { + const now = clock.now(); + undoLog.push([`State ${now} deleted`, `State ${now} todo`]); + return log.recordAndApply(`${now} Create ${description}`); + }, + addTag: function (createTimestamp: string, tag: string) { + return perform(`Tag ${createTimestamp} ${tag}`, `Untag ${createTimestamp} ${tag}`); + }, + edit: function (createTimestamp: string, newDescription: string, oldDescription: string) { + return perform(`Edit ${createTimestamp} ${newDescription}`, `Edit ${createTimestamp} ${oldDescription}`); + }, + removeTag: function (createTimestamp: string, tag: string) { + return perform(`Untag ${createTimestamp} ${tag}`, `Tag ${createTimestamp} ${tag}`); + }, + setPriority: function (createTimestamp: string, newPriority: number, oldPriority: number) { + return perform(`Priority ${createTimestamp} ${newPriority}`, `Priority ${createTimestamp} ${oldPriority}`); + }, + setState: function (createTimestamp: string, newState: string, oldState: string) { + return perform(`State ${createTimestamp} ${newState}`, `State ${createTimestamp} ${oldState}`); + }, + undo: function () { + const entry = undoLog.pop(); + if (entry) { + redoLog.push(entry); + return log.recordAndApply(`${clock.now()} ${entry[0]}`); + } + }, + redo: function () { + const entry = redoLog.pop(); + if (entry) { + undoLog.push(entry); + return log.recordAndApply(`${clock.now()} ${entry[1]}`); + } + }, + }; +} +const ui = UI(); + +enum CommitOrAbort { + Commit, + Abort, +} + +function BrowserUI() { + const viewColors: { [key: string]: string } = { + all: "Gold", + cancelled: "Red", + deleted: "Black", + done: "LawnGreen", + "someday-maybe": "DeepSkyBlue", + todo: "White", + waiting: "MediumOrchid", + }; + var currentTagView: string | null = null; + var currentViewState = "todo"; + var taskFocusedBeforeJumpingToInput: HTMLElement | null = null; + var lastTagNameEntered = ""; + return { + addTask: function (event: KeyboardEvent) { + const input = document.getElementById("taskName"); + if (input.value.match(/^ *$/)) return; + const task = ui.addTask(input.value); + if (currentViewState === "todo" || currentViewState === "all") { + task instanceof HTMLElement && task.focus(); + } else if (this.returnFocusAfterInput()) { + } else { + this.firstVisibleTask()?.focus(); + } + input.value = ""; + if (currentTagView) { + ui.addTag(task.getAttribute("data-created")!, currentTagView); + } + if (event.getModifierState("Control")) { + this.makeBottomPriority(task); + } + }, + + beginEdit: function (event: Event) { + const task = this.currentTask(); + 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 = this.currentTask(); + 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; + } + }, + + currentTag: function (): Element | null { + var target = document.activeElement; + if (!target) return null; + if (target.classList.contains("task")) { + const tags = target.getElementsByClassName("tag"); + target = tags[tags.length - 1]; + } + if (!target || !target.classList.contains("tag")) return null; + return target; + }, + + currentTask: function (): HTMLElement | null { + var target = document.activeElement; + if (!target) return null; + if (target.classList.contains("tag")) target = target.parentElement!; + return target as HTMLElement; + }, + + firstVisibleTask: function () { + for (const task of document.getElementsByClassName("task")) { + const state = task.getAttribute("data-state"); + if ( + task instanceof HTMLElement && + (state === currentViewState || (currentViewState === "all" && state !== "deleted")) && + !task.classList.contains("hide") + ) { + return task; + } + } + }, + + focusTaskNameInput: function (event: Event) { + taskFocusedBeforeJumpingToInput = this.currentTask(); document.getElementById("taskName")!.focus(); + window.scroll(0, 0); 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; + const state = cursor.getAttribute("data-state")!; + if ( + (state === currentViewState || (currentViewState === "all" && state !== "deleted")) && + !cursor.classList.contains("hide") + ) { + offset -= increment; + valid_cursor = cursor; + } + if (Math.abs(offset) < 0.5) break; + } + return valid_cursor; + }, + + jumpCursor: function (position: number) { + const first = this.firstVisibleTask(); + if (!first) return; + const dest = this.visibleTaskAtOffset(first, position - 1); + if (dest instanceof HTMLElement) dest.focus(); + }, + + makeBottomPriority: function (task: Element | null = null) { + if (!task) task = this.currentTask(); + if (!task) return; + this.setPriority(task, document.getElementById("tasks")!.lastElementChild, null); + }, + + makeTopPriority: function (task: Element | null = null) { + if (!task) task = this.currentTask(); + if (!task) return; + ui.setPriority(task.getAttribute("data-created")!, clock.now(), Model.getPriority(task)); + task instanceof HTMLElement && task.focus(); + }, + + moveCursor: function (offset: number): boolean { + const active = this.currentTask(); + 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 = this.currentTask(); + 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 () { + const target = this.currentTag(); + if (!target) return; + ui.removeTag(target.parentElement!.getAttribute("data-created")!, target.textContent!); + }, + + resetTagView: function () { + currentTagView = null; + for (const task of document.getElementsByClassName("task")) { + task.classList.remove("hide"); + } + }, + + resetView: function () { + this.setView("todo"); + this.resetTagView(); + }, + + 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 ? clock.now() : Model.getPriority(a); + const bPriority = b === null ? 0 : Model.getPriority(b); + console.assert(aPriority > bPriority, aPriority, ">", bPriority); + const span = aPriority - bPriority; + const newPriority = bPriority + 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 = this.currentTask(); + if (!task) return; + const oldState = task.getAttribute("data-state")!; + if (newState === oldState) return; + const createTimestamp = task.getAttribute("data-created")!; + if (currentViewState !== "all" || newState == "deleted") { + this.moveCursor(1) || this.moveCursor(-1); + } + return ui.setState(createTimestamp, newState, oldState); + }, + + setTagView: function () { + const target = this.currentTag(); + if (!target) return; + const tag = target.textContent!; + for (const task of document.getElementsByClassName("task")) { + if (Model.hasTag(task, tag)) { + task.classList.remove("hide"); + } else { + task.classList.add("hide"); + } + } + currentTagView = tag; + }, + + setView: function (state: string) { + const sheet = (document.getElementById("viewStyle") as HTMLStyleElement).sheet!; + if (state === "all") { + sheet.insertRule(`.task[data-state=deleted] { display: none }`); + } else { + sheet.insertRule(`.task:not([data-state=${state}]) { display: none }`); + } + sheet.insertRule(`:root { --view-state-indicator-color: ${viewColors[state]}; }`); + sheet.removeRule(2); + sheet.removeRule(2); + currentViewState = state; + if (this.currentTask()?.getAttribute("data-state") !== state) { + this.firstVisibleTask()?.focus(); + } + }, + + setUntaggedView: function () { + for (const task of document.getElementsByClassName("task")) { + if (task.getElementsByClassName("tag").length === 0) { + task.classList.remove("hide"); + } else { + task.classList.add("hide"); + } + } + }, + + undo: function () { + const ret = ui.undo(); + if (ret && ret instanceof HTMLElement) ret.focus(); + }, + redo: function () { + const ret = ui.redo(); + if (ret && ret instanceof HTMLElement) ret.focus(); + }, + }; } +const browserUI = BrowserUI(); -function browserCreateTask(form: any) { - if (form.taskName.value) { - Model.addTask(form.taskName.value); +const scrollIncrement = 60; +enum InputState { + Root, + S, + V, + VS, +} +var inputState = InputState.Root; +var inputCount: number | null = null; + +function handleKey(event: any) { + if (["Alt", "Control", "Meta", "Shift"].includes(event.key)) return; + 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.Root) { + if ("0" <= event.key && event.key <= "9") { + return (inputCount = (inputCount ?? 0) * 10 + parseInt(event.key)); + } + try { + if (event.ctrlKey) { + if (event.key == "e") return window.scrollBy(0, (inputCount ?? 1) * scrollIncrement); + if (event.key == "y") return window.scrollBy(0, (inputCount ?? 1) * -scrollIncrement); + } else { + if (event.key == "j") return browserUI.moveCursor(inputCount ?? 1); + if (event.key == "k") return browserUI.moveCursor(-(inputCount ?? 1)); + if (event.key == "J") return browserUI.moveTask(inputCount ?? 1); + if (event.key == "K") return browserUI.moveTask(-(inputCount ?? 1)); + if (event.key == "G") return browserUI.jumpCursor(inputCount ?? MAX_SAFE_INTEGER); + if (event.key == "T") return browserUI.makeTopPriority(); + 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 (inputState = InputState.S); + 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 == "r") return browserUI.redo(); + if (event.key == "e") return browserUI.beginEdit(event); + if (event.key == "t") return browserUI.beginTagEdit(event); + if (event.key == "v") return (inputState = InputState.V); + } + } finally { + inputCount = null; + } + } else if (inputState === InputState.S) { + inputState = InputState.Root; + if (event.key == "m") return browserUI.setState("someday-maybe"); + } else if (inputState === InputState.V) { + inputState = InputState.Root; + if (event.key == "a") return browserUI.setView("all"); + if (event.key == "c") return browserUI.setView("cancelled"); + if (event.key == "d") return browserUI.setView("done"); + if (event.key == "i") return browserUI.setUntaggedView(); + if (event.key == "q") return browserUI.setView("todo"); + if (event.key == "s") return (inputState = InputState.VS); + if (event.key == "T") return browserUI.resetTagView(); + if (event.key == "t") return browserUI.setTagView(); + if (event.key == "u") return browserUI.setUntaggedView(); + if (event.key == "v") return browserUI.resetView(); + if (event.key == "w") return browserUI.setView("waiting"); + if (event.key == "x") return browserUI.setView("deleted"); + } else if (inputState === InputState.VS) { + inputState = InputState.Root; + if (event.key == "m") return browserUI.setView("someday-maybe"); + } } - form.taskName.value = ""; - return false; } function browserInit() { + log.replay(); + browserUI.firstVisibleTask()?.focus(); document.body.addEventListener("keydown", handleKey, { capture: false }); }