From 469eaf27d569498939d5341a4b2dc778a1fb8e27 Mon Sep 17 00:00:00 2001
From: Devine Lu Linvega <aliceffekt@gmail.com>
Date: Fri, 7 Jun 2019 10:56:01 +0200
Subject: Return of the keys operator!

---
 desktop/core/io/midi.js       | 35 +++++++++++++++++++++++------------
 desktop/core/library.js       |  2 ++
 desktop/core/library/_keys.js | 27 +++++++++++++++++++++++++++
 3 files changed, 52 insertions(+), 12 deletions(-)
 create mode 100644 desktop/core/library/_keys.js

diff --git a/desktop/core/io/midi.js b/desktop/core/io/midi.js
index 01706e9..0267e9b 100644
--- a/desktop/core/io/midi.js
+++ b/desktop/core/io/midi.js
@@ -12,7 +12,7 @@ export default function Midi (terminal) {
   this.inputs = []
   this.stack = []
 
-  this.key = null
+  this.keys = {}
 
   this.start = function () {
     console.info('Midi Starting..')
@@ -111,12 +111,12 @@ export default function Midi (terminal) {
 
   // Keys
 
-  this.keyDown = function (key) {
-    this.key = parseInt(key)
+  this.keyDown = function (channel, key) {
+    this.keys[channel] = key
   }
 
-  this.keyUp = function () {
-    this.key = null
+  this.keyUp = function (channel, key) {
+    this.keys[channel] = null
   }
 
   // Clock
@@ -139,14 +139,17 @@ export default function Midi (terminal) {
   }
 
   this.receive = function (msg) {
+    // Keys
+    if (msg.data[0] >= 144 && msg.data[0] < 160) {
+      this.keyDown(msg.data[0] - 144, msg.data[1])
+      return
+    }
+    if (msg.data[0] >= 128 && msg.data[0] < 144) {
+      this.keyUp(msg.data[0] - 128, msg.data[1])
+      return
+    }
+
     switch (msg.data[0]) {
-      // Keys
-      case 0x90:
-        this.keyDown(msg.data[1])
-        break
-      case 0x80:
-        this.keyUp()
-        break
       // Clock
       case 0xF8:
         terminal.clock.tap()
@@ -228,6 +231,14 @@ export default function Midi (terminal) {
     return { id, value, note, octave }
   }
 
+  this.convert = function (id) {
+    const note = ['C', 'c', 'D', 'd', 'E', 'F', 'f', 'G', 'g', 'A', 'a', 'B'][id % 12]
+    const octave = Math.floor(id / 12) - 5
+    const name = `${note}${octave}`
+    const key = Object.values(transpose).indexOf(name)
+    return Object.keys(transpose)[key]
+  }
+
   this.toString = function () {
     return this.outputDevice() ? `${this.outputDevice().name}` : 'No Midi'
   }
diff --git a/desktop/core/library.js b/desktop/core/library.js
index 4feaf70..8d10ec2 100644
--- a/desktop/core/library.js
+++ b/desktop/core/library.js
@@ -31,6 +31,7 @@ import _bang from './library/_bang.js'
 import _comment from './library/_comment.js'
 import _midi from './library/_midi.js'
 import _mono from './library/_mono.js'
+import _keys from './library/_keys.js'
 import _cc from './library/_cc.js'
 import _udp from './library/_udp.js'
 import _osc from './library/_osc.js'
@@ -76,6 +77,7 @@ export default {
   '#': _comment,
   ':': _midi,
   '%': _mono,
+  '&': _keys,
   '!': _cc,
   ';': _udp,
   '=': _osc
diff --git a/desktop/core/library/_keys.js b/desktop/core/library/_keys.js
new file mode 100644
index 0000000..6b181fb
--- /dev/null
+++ b/desktop/core/library/_keys.js
@@ -0,0 +1,27 @@
+'use strict'
+
+import Operator from '../operator.js'
+
+export default function OperatorKeys (orca, x, y, passive) {
+  Operator.call(this, orca, x, y, '&', true)
+
+  this.name = 'keys'
+  this.info = 'Receive MIDI note'
+
+  this.ports.channel = { x: 1, y: 0, clamp: { min: 0, max: 16 } }
+  this.ports.output = { x: 0, y: 1 }
+
+  this.operation = function (force = false) {
+    const channel = this.listen(this.ports.channel, true)
+    if (channel === '.') { return }
+
+    const id = terminal.io.midi.keys[channel]
+
+    if (force === true) {
+      terminal.io.mono.run()
+    }
+    this.draw = false
+
+    return id ? terminal.io.midi.convert(id) : '.'
+  }
+}
-- 
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