From a24563042236b0d73fa6d7d9e2ee884f183e0128 Mon Sep 17 00:00:00 2001
From: poire-z <poire-z@users.noreply.github.com>
Date: Tue, 15 Jan 2019 18:40:36 +0100
Subject: [PATCH] Implement generic internal clipboard for all devices

Will allow copying selected text from a book to the TextEditor.
Will be overriden on devices that implement interactions with
the system clipboard.
---
 frontend/device/generic/device.lua |  2 +-
 frontend/device/input.lua          | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/frontend/device/generic/device.lua b/frontend/device/generic/device.lua
index c592b39e8..e6d536b5b 100644
--- a/frontend/device/generic/device.lua
+++ b/frontend/device/generic/device.lua
@@ -24,7 +24,7 @@ local Device = {
     isTouchDevice = no,
     hasFrontlight = no,
     needsTouchScreenProbe = no,
-    hasClipboard = no,
+    hasClipboard = yes, -- generic internal clipboard on all devices
     hasColorScreen = no,
     hasBGRFrameBuffer = no,
     canToggleGSensor = no,
diff --git a/frontend/device/input.lua b/frontend/device/input.lua
index b87a7a6a0..5d130ec00 100755
--- a/frontend/device/input.lua
+++ b/frontend/device/input.lua
@@ -75,6 +75,8 @@ local MSC_RAW_GSENSOR_FRONT = 0x1c
 
 -- luacheck: pop
 
+local _internal_clipboard_text = nil -- holds the last copied text
+
 local Input = {
     -- this depends on keyboard layout and should be overridden:
     event_map = {},
@@ -141,6 +143,17 @@ local Input = {
         }
     },
     gesture_detector = nil,
+
+    -- simple internal clipboard implementation, can be overidden to use system clipboard
+    hasClipboardText = function()
+        return _internal_clipboard_text ~= nil and _internal_clipboard_text ~= ""
+    end,
+    getClipboardText = function()
+        return _internal_clipboard_text
+    end,
+    setClipboardText = function(text)
+        _internal_clipboard_text = text
+    end,
 }
 
 function Input:new(o)