Bug 1381421 - (Part 1) Handle dates earlier than 0001-01-01 and later than 275760-09-13 correctly

3 files changed, 75 insertions, 62 deletions

diff --git a/toolkit/content/widgets/calendar.js b/toolkit/content/widgets/calendar.js
index 80c2976e08..44ba675014 100644
--- a/toolkit/content/widgets/calendar.js
+++ b/toolkit/content/widgets/calendar.js
@@ -11,6 +11,9 @@
  * @param {Object} options
  *        {
  *          {Number} calViewSize: Number of days to appear on a calendar view
+ *          {Function} getDayString: Transform day number to string
+ *          {Function} getWeekHeaderString: Transform day of week number to string
+ *          {Function} setSelection: Set selection for dateKeeper
  *        }
  * @param {Object} context
  *        {
@@ -24,9 +27,11 @@ function Calendar(options, context) {
   this.context = context;
   this.state = {
     days: [],
-    weekHeaders: []
+    weekHeaders: [],
+    setSelection: options.setSelection,
+    getDayString: options.getDayString,
+    getWeekHeaderString: options.getWeekHeaderString
   };
-  this.props = {};
   this.elements = {
     weekHeaders: this._generateNodes(DAYS_IN_A_WEEK, context.weekHeader),
     daysView: this._generateNodes(options.calViewSize, context.daysView)
@@ -46,34 +51,32 @@ function Calendar(options, context) {
      *          {Boolean} isVisible: Whether or not the calendar is in view
      *          {Array<Object>} days: Data for days
      *          {
-     *            {Number} dateValue: Date in milliseconds
-     *            {Number} textContent
+     *            {Date} dateObj
+     *            {Number} content
      *            {Array<String>} classNames
+     *            {Boolean} enabled
      *          }
      *          {Array<Object>} weekHeaders: Data for weekHeaders
      *          {
-     *            {Number} textContent
+     *            {Number} content
      *            {Array<String>} classNames
-     *            {Boolean} enabled
      *          }
-     *          {Function} getDayString: Transform day number to string
-     *          {Function} getWeekHeaderString: Transform day of week number to string
-     *          {Function} setSelection: Set selection for dateKeeper
      *        }
      */
     setProps(props) {
       if (props.isVisible) {
         // Transform the days and weekHeaders array for rendering
-        const days = props.days.map(({ dateObj, classNames, enabled }) => {
+        const days = props.days.map(({ dateObj, content, classNames, enabled }) => {
           return {
-          textContent: props.getDayString(dateObj.getUTCDate()),
+          dateObj,
+          textContent: this.state.getDayString(content),
           className: classNames.join(" "),
           enabled
           };
         });
-        const weekHeaders = props.weekHeaders.map(({ textContent, classNames }) => {
+        const weekHeaders = props.weekHeaders.map(({ content, classNames }) => {
           return {
-            textContent: props.getWeekHeaderString(textContent),
+            textContent: this.state.getWeekHeaderString(content),
             className: classNames.join(" ")
           };
         });
@@ -92,8 +95,6 @@ function Calendar(options, context) {
         this.state.days = days;
         this.state.weekHeaders = weekHeaders;
       }
-
-      this.props = Object.assign(this.props, props);
     },
 
     /**
@@ -150,9 +151,9 @@ function Calendar(options, context) {
         case "click": {
           if (event.target.parentNode == this.context.daysView) {
             let targetId = event.target.dataset.id;
-            let targetObj = this.props.days[targetId];
+            let targetObj = this.state.days[targetId];
             if (targetObj.enabled) {
-              this.props.setSelection(targetObj.dateObj);
+              this.state.setSelection(targetObj.dateObj);
             }
           }
           break;
diff --git a/toolkit/content/widgets/datekeeper.js b/toolkit/content/widgets/datekeeper.js
index 4959b96092..5d70416a93 100644
--- a/toolkit/content/widgets/datekeeper.js
+++ b/toolkit/content/widgets/datekeeper.js
@@ -19,9 +19,11 @@ function DateKeeper(props) {
         // The min value is 0001-01-01 based on HTML spec:
         // https://html.spec.whatwg.org/#valid-date-string
         MIN_DATE = -62135596800000,
-        // The max value is derived from the ECMAScript spec:
+        // The max value is derived from the ECMAScript spec (275760-09-13):
         // http://ecma-international.org/ecma-262/5.1/#sec-15.9.1.1
-        MAX_DATE = 8640000000000000;
+        MAX_DATE = 8640000000000000,
+        MAX_YEAR = 275760,
+        MAX_MONTH = 9;
 
   DateKeeper.prototype = {
     get year() {
@@ -32,10 +34,6 @@ function DateKeeper(props) {
       return this.state.dateObj.getUTCMonth();
     },
 
-    get day() {
-      return this.state.dateObj.getUTCDate();
-    },
-
     get selection() {
       return this.state.selection;
     },
@@ -55,7 +53,6 @@ function DateKeeper(props) {
      */
     init({ year, month, day, min, max, step, stepBase, firstDayOfWeek = 0, weekends = [0], calViewSize = 42 }) {
       const today = new Date();
-      const isDateSet = year != undefined && month != undefined && day != undefined;
 
       this.state = {
         step, firstDayOfWeek, weekends, calViewSize,
@@ -66,28 +63,34 @@ function DateKeeper(props) {
         today: this._newUTCDate(today.getFullYear(), today.getMonth(), today.getDate()),
         weekHeaders: this._getWeekHeaders(firstDayOfWeek, weekends),
         years: [],
-        months: [],
-        days: [],
+        dateObj: new Date(0),
         selection: { year, month, day },
       };
 
-      this.state.dateObj = isDateSet ?
-                           this._newUTCDate(year, month, day) :
-                           new Date(this.state.today);
+      this.setCalendarMonth({
+        year: year === undefined ? today.getFullYear() : year,
+        month: month === undefined ? today.getMonth() : month
+      });
     },
     /**
-     * Set new date. The year is always treated as full year, so the short-form
-     * is not supported.
+     * Set new calendar month. The year is always treated as full year, so the
+     * short-form is not supported.
      * @param {Object} date parts
      *        {
      *          {Number} year [optional]
      *          {Number} month [optional]
-     *          {Number} date [optional]
      *        }
      */
-    set({ year = this.year, month = this.month, day = this.day }) {
+    setCalendarMonth({ year = this.year, month = this.month }) {
+      // Make sure the date is valid before setting.
       // Use setUTCFullYear so that year 99 doesn't get parsed as 1999
-      this.state.dateObj.setUTCFullYear(year, month, day);
+      if (year > MAX_YEAR || year === MAX_YEAR && month >= MAX_MONTH) {
+        this.state.dateObj.setUTCFullYear(MAX_YEAR, MAX_MONTH - 1, 1);
+      } else if (year < 1 || year === 1 && month < 0) {
+        this.state.dateObj.setUTCFullYear(1, 0, 1);
+      } else {
+        this.state.dateObj.setUTCFullYear(year, month, 1);
+      }
     },
 
     /**
@@ -107,10 +110,7 @@ function DateKeeper(props) {
      * @param {Number} month
      */
     setMonth(month) {
-      const lastDayOfMonth = this._newUTCDate(this.year, month + 1, 0).getUTCDate();
-      this.set({ year: this.year,
-                 month,
-                 day: Math.min(this.day, lastDayOfMonth) });
+      this.setCalendarMonth({ year: this.year, month });
     },
 
     /**
@@ -118,10 +118,7 @@ function DateKeeper(props) {
      * @param {Number} year
      */
     setYear(year) {
-      const lastDayOfMonth = this._newUTCDate(year, this.month + 1, 0).getUTCDate();
-      this.set({ year,
-                 month: this.month,
-                 day: Math.min(this.day, lastDayOfMonth) });
+      this.setCalendarMonth({ year, month: this.month });
     },
 
     /**
@@ -129,10 +126,7 @@ function DateKeeper(props) {
      * @param {Number} offset
      */
     setMonthByOffset(offset) {
-      const lastDayOfMonth = this._newUTCDate(this.year, this.month + offset + 1, 0).getUTCDate();
-      this.set({ year: this.year,
-                 month: this.month + offset,
-                 day: Math.min(this.day, lastDayOfMonth) });
+      this.setCalendarMonth({ year: this.year, month: this.month + offset });
     },
 
     /**
@@ -178,10 +172,13 @@ function DateKeeper(props) {
           currentYear >= lastItem.value - YEAR_BUFFER_SIZE) {
         // The year is set in the middle with items on both directions
         for (let i = -(YEAR_VIEW_SIZE / 2); i < YEAR_VIEW_SIZE / 2; i++) {
-          years.push({
-            value: currentYear + i,
-            enabled: true
-          });
+          const year = currentYear + i;
+          if (year >= 1 && year <= MAX_YEAR) {
+            years.push({
+              value: year,
+              enabled: true
+            });
+          }
         }
         this.state.years = years;
       }
@@ -193,6 +190,7 @@ function DateKeeper(props) {
      * @return {Array<Object>}
      *         {
      *           {Date} dateObj
+     *           {Number} content
      *           {Array<String>} classNames
      *           {Boolean} enabled
      *         }
@@ -206,9 +204,22 @@ function DateKeeper(props) {
         const dateObj = this._newUTCDate(firstDayOfMonth.getUTCFullYear(),
                                          firstDayOfMonth.getUTCMonth(),
                                          firstDayOfMonth.getUTCDate() + i);
+
         let classNames = [];
         let enabled = true;
 
+        const isValid = dateObj.getTime() >= MIN_DATE && dateObj.getTime() <= MAX_DATE;
+        if (!isValid) {
+          classNames.push("out-of-range");
+          enabled = false;
+
+          days.push({
+            classNames,
+            enabled,
+          });
+          continue;
+        }
+
         const isWeekend = this.state.weekends.includes(dateObj.getUTCDay());
         const isCurrentMonth = month == dateObj.getUTCMonth();
         const isSelection = this.state.selection.year == dateObj.getUTCFullYear() &&
@@ -244,6 +255,7 @@ function DateKeeper(props) {
         }
         days.push({
           dateObj,
+          content: dateObj.getUTCDate(),
           classNames,
           enabled,
         });
@@ -275,7 +287,7 @@ function DateKeeper(props) {
      * @param  {Array<Number>} weekends
      * @return {Array<Object>}
      *         {
-     *           {Number} textContent
+     *           {Number} content
      *           {Array<String>} classNames
      *         }
      */
@@ -285,7 +297,7 @@ function DateKeeper(props) {
 
       for (let i = 0; i < DAYS_IN_A_WEEK; i++) {
         headers.push({
-          textContent: dayOfWeek % DAYS_IN_A_WEEK,
+          content: dayOfWeek % DAYS_IN_A_WEEK,
           classNames: weekends.includes(dayOfWeek % DAYS_IN_A_WEEK) ? ["weekend"] : []
         });
         dayOfWeek++;
@@ -318,7 +330,7 @@ function DateKeeper(props) {
      * @return {Date}
      */
     _newUTCDate(...parts) {
-      return new Date(Date.UTC(...parts));
-    }
+      return new Date(new Date(0).setUTCFullYear(...parts));
+    },
   };
 }
diff --git a/toolkit/content/widgets/datepicker.js b/toolkit/content/widgets/datepicker.js
index 0c288d9174..f5659b736e 100644
--- a/toolkit/content/widgets/datepicker.js
+++ b/toolkit/content/widgets/datepicker.js
@@ -54,7 +54,7 @@ function DatePicker(context) {
         dateKeeper,
         locale,
         isMonthPickerVisible: false,
-        getDayString: new Intl.NumberFormat(locale).format,
+        getDayString: day => day ? new Intl.NumberFormat(locale).format(day) : "",
         getWeekHeaderString: weekday => weekdayStrings[weekday],
         getMonthString: month => monthStrings[month],
         setSelection: date => {
@@ -101,7 +101,10 @@ function DatePicker(context) {
       this.components = {
         calendar: new Calendar({
           calViewSize: CAL_VIEW_SIZE,
-          locale: this.state.locale
+          locale: this.state.locale,
+          setSelection: this.state.setSelection,
+          getDayString: this.state.getDayString,
+          getWeekHeaderString: this.state.getWeekHeaderString
         }, {
           weekHeader: this.context.weekHeader,
           daysView: this.context.daysView
@@ -141,10 +144,7 @@ function DatePicker(context) {
       this.components.calendar.setProps({
         isVisible: !isMonthPickerVisible,
         days: this.state.days,
-        weekHeaders: dateKeeper.state.weekHeaders,
-        setSelection: this.state.setSelection,
-        getDayString: this.state.getDayString,
-        getWeekHeaderString: this.state.getWeekHeaderString
+        weekHeaders: dateKeeper.state.weekHeaders
       });
 
       isMonthPickerVisible ?
@@ -254,8 +254,8 @@ function DatePicker(context) {
     set({ year, month, day }) {
       const { dateKeeper } = this.state;
 
-      dateKeeper.set({
-        year, month, day
+      dateKeeper.setCalendarMonth({
+        year, month
       });
       dateKeeper.setSelection({
         year, month, day