pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/chrome/content/InputWidgetHelper.js

@@ -0,0 +1,98 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+var InputWidgetHelper = {
+  _uiBusy: false,
+
+  handleEvent: function(aEvent) {
+    this.handleClick(aEvent.target);
+  },
+
+  handleClick: function(aTarget) {
+    // if we're busy looking at a InputWidget we want to eat any clicks that
+    // come to us, but not to process them
+    if (this._uiBusy || !this.hasInputWidget(aTarget) || this._isDisabledElement(aTarget))
+      return;
+
+    this._uiBusy = true;
+    this.show(aTarget);
+    this._uiBusy = false;
+  },
+
+  show: function(aElement) {
+    let type = aElement.getAttribute('type');
+    let p = new Prompt({
+      window: aElement.ownerDocument.defaultView,
+      title: Strings.browser.GetStringFromName("inputWidgetHelper." + aElement.getAttribute('type')),
+      buttons: [
+        Strings.browser.GetStringFromName("inputWidgetHelper.set"),
+        Strings.browser.GetStringFromName("inputWidgetHelper.clear"),
+        Strings.browser.GetStringFromName("inputWidgetHelper.cancel")
+      ],
+    }).addDatePicker({
+      value: aElement.value,
+      type: type,
+      min: aElement.min,
+      max: aElement.max,
+    }).show((function(data) {
+      let changed = false;
+      if (data.button == -1) {
+        // This type is not supported with this android version.
+        return;
+      }
+      if (data.button == 1) {
+        // The user cleared the value.
+        if (aElement.value != "") {
+          aElement.value = "";
+          changed = true;
+        }
+      } else if (data.button == 0) {
+        // Commit the new value.
+        if (aElement.value != data[type]) {
+          aElement.value = data[type + "0"];
+          changed = true;
+        }
+      }
+      // Else the user canceled the input.
+
+      if (changed)
+        this.fireOnChange(aElement);
+    }).bind(this));
+  },
+
+  hasInputWidget: function(aElement) {
+    if (!(aElement instanceof HTMLInputElement))
+      return false;
+
+    let type = aElement.getAttribute('type');
+    if (type == "date" || type == "datetime" || type == "datetime-local" ||
+        type == "week" || type == "month" || type == "time") {
+      return true;
+    }
+
+    return false;
+  },
+
+  fireOnChange: function(aElement) {
+    let evt = aElement.ownerDocument.createEvent("Events");
+    evt.initEvent("change", true, true, aElement.defaultView, 0,
+                  false, false,
+                  false, false, null);
+    setTimeout(function() {
+      aElement.dispatchEvent(evt);
+    }, 0);
+  },
+
+  _isDisabledElement : function(aElement) {
+    let currentElement = aElement;
+    while (currentElement) {
+      if (currentElement.disabled)
+	return true;
+
+      currentElement = currentElement.parentElement;
+    }
+    return false;
+  }
+};