From a54c3bf8c046470057956354f0f3540d178515a2 Mon Sep 17 00:00:00 2001
From: "Anthony J. Thibault" <tony@highfidelity.io>
Date: Fri, 2 Sep 2016 16:23:46 -0700
Subject: [PATCH] support for backspace, carriage return, space and period.

---
 interface/resources/qml/controls/Keyboard.qml | 54 ++++++++++++++++++-
 .../src/RenderableWebEntityItem.cpp           | 34 +++++++++++-
 2 files changed, 85 insertions(+), 3 deletions(-)

diff --git a/interface/resources/qml/controls/Keyboard.qml b/interface/resources/qml/controls/Keyboard.qml
index 9b1cb0e277..4bd5bd2ece 100644
--- a/interface/resources/qml/controls/Keyboard.qml
+++ b/interface/resources/qml/controls/Keyboard.qml
@@ -147,7 +147,13 @@ Item {
                 width: 480
                 height: 50
                 anchors.left: parent.left
-                anchors.leftMargin: 79
+                anchors.leftMargin: 0
+
+                Key {
+                    id: key27
+                    width: 79
+                    glyph: "⇪"
+                }
 
                 Key {
                     id: key20
@@ -183,12 +189,45 @@ Item {
                     id: key26
                     glyph: "m"
                 }
+
+                Key {
+                    id: key28
+                    width: 85
+                    glyph: "←"
+                }
+
             }
 
             Row {
                 id: row4
                 width: 480
                 height: 50
+                anchors.left: parent.left
+                anchors.leftMargin: 59
+
+                Key {
+                    id: key30
+                    width: 45
+                    glyph: "⁂"
+                }
+
+                Key {
+                    id: key29
+                    width: 200
+                    glyph: " "
+                }
+
+                Key {
+                    id: key31
+                    glyph: "."
+                }
+
+                Key {
+                    id: key32
+                    width: 65
+                    glyph: "⏎"
+                }
+
             }
         }
     }
@@ -206,4 +245,17 @@ Item {
         anchors.bottomMargin: 0
     }
 
+    Rectangle {
+        id: rectangle1
+        color: "#ffffff"
+        anchors.bottom: keyboardRect.top
+        anchors.bottomMargin: 0
+        anchors.left: parent.left
+        anchors.leftMargin: 0
+        anchors.right: parent.right
+        anchors.rightMargin: 0
+        anchors.top: parent.top
+        anchors.topMargin: 0
+    }
+
 }
diff --git a/libraries/entities-renderer/src/RenderableWebEntityItem.cpp b/libraries/entities-renderer/src/RenderableWebEntityItem.cpp
index e3c5dac2c0..568bf7c787 100644
--- a/libraries/entities-renderer/src/RenderableWebEntityItem.cpp
+++ b/libraries/entities-renderer/src/RenderableWebEntityItem.cpp
@@ -353,10 +353,40 @@ bool RenderableWebEntityItem::isTransparent() {
     return fadeRatio < OPAQUE_ALPHA_THRESHOLD;
 }
 
+// UTF-8 encoded symbols
+static const uint8_t UPWARDS_WHITE_ARROW_FROM_BAR[] = { 0xE2, 0x87, 0xAA, 0x00 }; // shift
+static const uint8_t ERASE_TO_THE_LEFT[] = { 0xE2, 0x8C, 0xAB, 0x00 }; // backspace
+static const uint8_t LONG_LEFTWARDS_ARROW[] = { 0xE2, 0x9F, 0xB5, 0x00 };  // backspace
+static const uint8_t LEFT_ARROW[] = { 0xE2, 0x86, 0x90 }; // backspace
+static const uint8_t ASTERISIM[] = { 0xE2, 0x81, 0x82, 0x00 }; // symbols
+static const uint8_t RETURN_SYMBOL[] = { 0xE2, 0x8F, 0x8E, 0x00 }; // return
+
+static bool equals(const QByteArray& byteArray, const uint8_t* ptr) {
+    for (int i = 0; i < byteArray.size(); i++) {
+        if ((char)ptr[i] != byteArray[i]) {
+            return false;
+        }
+    }
+    return true;
+}
+
 void RenderableWebEntityItem::synthesizeKeyPress(QString key) {
     auto utf8Key = key.toUtf8();
-    QKeyEvent* pressEvent = new QKeyEvent(QEvent::KeyPress, (int)utf8Key[0], Qt::NoModifier, key);
-    QKeyEvent* releaseEvent = new QKeyEvent(QEvent::KeyRelease, (int)utf8Key[0], Qt::NoModifier, key);
+
+    int scanCode = (int)utf8Key[0];
+    QString keyString = key;
+    if (equals(utf8Key, UPWARDS_WHITE_ARROW_FROM_BAR) || equals(utf8Key, ASTERISIM)) {
+        return;  // ignore
+    } else if (equals(utf8Key, ERASE_TO_THE_LEFT) || equals(utf8Key, LONG_LEFTWARDS_ARROW) | equals(utf8Key, LEFT_ARROW)) {
+        scanCode = Qt::Key_Backspace;
+        keyString = "\x08";
+    } else if (equals(utf8Key, RETURN_SYMBOL)) {
+        scanCode = Qt::Key_Return;
+        keyString = "\x0d";
+    }
+
+    QKeyEvent* pressEvent = new QKeyEvent(QEvent::KeyPress, scanCode, Qt::NoModifier, keyString);
+    QKeyEvent* releaseEvent = new QKeyEvent(QEvent::KeyRelease, scanCode, Qt::NoModifier, keyString);
     QCoreApplication::postEvent(getEventHandler(), pressEvent);
     QCoreApplication::postEvent(getEventHandler(), releaseEvent);
 }