X-Git-Url: http://git.scottworley.com/vopamoi/blobdiff_plain/45cbd5e56cd386532ed16ded6c1b3c7cd6adfef6..682139fcfed4fc2110ebef8a47953bb8655c8fba:/vopamoi.ts diff --git a/vopamoi.ts b/vopamoi.ts index 5e645b8..b16bc70 100644 --- a/vopamoi.ts +++ b/vopamoi.ts @@ -13,6 +13,22 @@ function splitN(str: string, delimiter: string, limit: number = MAX_SAFE_INTEGER 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"); @@ -20,11 +36,37 @@ const Model = { 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")!); @@ -40,27 +82,26 @@ const Model = { } }, - setPriority: function (createTimestamp: string, priority: number) { + 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); + task.setAttribute("data-state", state); if (task instanceof HTMLElement) { - task.style.display = "none"; // Until view filtering + task.style.display = state == "todo" ? "block" : "none"; // Until view filtering } } }, @@ -74,6 +115,10 @@ function Log(prefix: string = "vp-") { 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); @@ -107,15 +152,30 @@ function Log(prefix: string = "vp-") { } const log = Log(); +const undoLog: string[] = []; + const UI = { addTask: function (description: string): Element { - return log.recordAndApply(`${Date.now()} Create ${description}`); + const now = clock.now(); + undoLog.push(`State ${now} deleted`); + return log.recordAndApply(`${now} Create ${description}`); }, - setPriority: function (createTimestamp: string, priority: number) { - return log.recordAndApply(`${Date.now()} Priority ${createTimestamp} ${priority}`); + edit: function (createTimestamp: string, newDescription: string, oldDescription: string) { + undoLog.push(`Edit ${createTimestamp} ${oldDescription}`); + return log.recordAndApply(`${clock.now()} Edit ${createTimestamp} ${newDescription}`); }, - setState: function (createTimestamp: string, state: string) { - return log.recordAndApply(`${Date.now()} State ${createTimestamp} ${state}`); + 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()}`); + } }, }; @@ -124,6 +184,7 @@ const BrowserUI = { const input = 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]); @@ -131,6 +192,37 @@ const BrowserUI = { } }, + 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", BrowserUI.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", BrowserUI.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); + } + }, + firstVisibleTask: function () { for (const task of document.getElementsByClassName("task")) { if (task instanceof HTMLElement && task.style.display !== "none") { @@ -188,37 +280,65 @@ const BrowserUI = { // 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); + 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); + UI.setPriority(task.getAttribute("data-created")!, okToRound ? newPriorityRounded : newPriority, Model.getPriority(task)); + task instanceof HTMLElement && task.focus(); }, - setState: function (state: string) { - const createTimestamp = document.activeElement?.getAttribute("data-created"); + 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!, state); + return UI.setState(createTimestamp, newState, oldState); + }, + + undo: function () { + const ret = UI.undo(); + if (ret && ret instanceof HTMLElement) ret.focus(); }, }; +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 (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 == "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 == "t") return BrowserUI.setState("todo"); + 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) { + return (inputState = InputState.Command); + } } }