Use CSS for filtering the view

[vopamoi] / vopamoi.ts

diff --git a/vopamoi.ts b/vopamoi.ts
index 04c5d414be7a46190e4d5679991b0d1edc4cd38e..f93c51c45a134826c034626377e62457dfbfc3bb 100644 (file)
--- 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");
@@ -20,6 +36,7 @@ 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);
     return task;
   },
@@ -57,10 +74,6 @@ const Model = {
     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) {
@@ -87,9 +100,6 @@ const Model = {
     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
-      }
     }
   },
 };
@@ -143,25 +153,25 @@ const undoLog: string[] = [];
 
 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} ${oldDescription}`);
-    return log.recordAndApply(`${Date.now()} Edit ${createTimestamp} ${newDescription}`);
+    return log.recordAndApply(`${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()}`);
     }
   },
 };
@@ -212,7 +222,7 @@ const BrowserUI = {
 
   firstVisibleTask: function () {
     for (const task of document.getElementsByClassName("task")) {
-      if (task instanceof HTMLElement && task.style.display !== "none") {
+      if (task instanceof HTMLElement && task.getAttribute("data-state")! === "todo") {
         return task;
       }
     }
@@ -230,7 +240,7 @@ const BrowserUI = {
     while (true) {
       cursor = increment > 0 ? cursor.nextElementSibling : cursor.previousElementSibling;
       if (!cursor || !(cursor instanceof HTMLElement)) break;
-      if (cursor.style.display !== "none") {
+      if (cursor.getAttribute("data-state")! === "todo") {
         offset -= increment;
         valid_cursor = cursor;
       }
@@ -267,7 +277,7 @@ 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();
@@ -281,7 +291,7 @@ const BrowserUI = {
   setState: function (newState: string) {
     const task = document.activeElement;
     if (!task) return;
-    const oldState = Model.getState(task);
+    const oldState = task.getAttribute("data-state")!;
     if (newState === oldState) return;
     const createTimestamp = task.getAttribute("data-created")!;
     this.moveCursor(1) || this.moveCursor(-1);
@@ -294,6 +304,12 @@ const BrowserUI = {
   },
 };
 
+enum InputState {
+  Command,
+  View,
+}
+var inputState = InputState.Command;
+
 function handleKey(event: any) {
   if (event.target.tagName === "INPUT") {
     if (event.target.id === "taskName") {
@@ -302,19 +318,24 @@ function handleKey(event: any) {
       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 == "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 (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);
+    }
   }
 }