From be2bcac28ea0be8163da0c4f22f45f4510d4aa2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mart=C3=ADn=20Fdez?= <paziusss@gmail.com>
Date: Fri, 27 Nov 2020 20:51:40 +0100
Subject: [PATCH] switch between internal and external sdcard

---
 frontend/apps/filemanager/filemanager.lua | 28 ++++++++++++++++++++++-
 frontend/device/android/device.lua        |  1 +
 frontend/device/generic/device.lua        |  1 +
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/frontend/apps/filemanager/filemanager.lua b/frontend/apps/filemanager/filemanager.lua
index 4baab12f0..e002133e2 100644
--- a/frontend/apps/filemanager/filemanager.lua
+++ b/frontend/apps/filemanager/filemanager.lua
@@ -641,7 +641,7 @@ function FileManager:tapPlus()
         table.insert(buttons, 3, {
             {
                 text = _("Import files here"),
-                enabled = Device.isValidPath(self.file_chooser.path),
+                enabled = Device:isValidPath(self.file_chooser.path),
                 callback = function()
                     local current_dir = self.file_chooser.path
                     UIManager:close(self.file_dialog)
@@ -651,6 +651,32 @@ function FileManager:tapPlus()
         })
     end
 
+    if Device:hasExternalSD() then
+        table.insert(buttons, 4, {
+            {
+                text_func = function()
+                    if Device:isValidPath(self.file_chooser.path) then
+                        return _("Switch to SDCard")
+                    else
+                        return _("Switch to internal storage")
+                    end
+                end,
+                callback = function()
+                    if Device:isValidPath(self.file_chooser.path) then
+                        local ok, sd_path = Device:hasExternalSD()
+                        UIManager:close(self.file_dialog)
+                        if ok then
+                            self.file_chooser:changeToPath(sd_path)
+                        end
+                    else
+                        UIManager:close(self.file_dialog)
+                        self.file_chooser:changeToPath(Device.home_dir)
+                    end
+                end,
+            },
+        })
+    end
+
     self.file_dialog = ButtonDialogTitle:new{
         title = BD.dirpath(filemanagerutil.abbreviate(self.file_chooser.path)),
         title_align = "center",
diff --git a/frontend/device/android/device.lua b/frontend/device/android/device.lua
index f89fc8e50..afae22b90 100644
--- a/frontend/device/android/device.lua
+++ b/frontend/device/android/device.lua
@@ -93,6 +93,7 @@ local Device = Generic:new{
         return android.openLink(link) == 0
     end,
     canImportFiles = function() return android.app.activity.sdkVersion >= 19 end,
+    hasExternalSD = function() return android.getExternalSdPath() end,
     importFile = function(path) android.importFile(path) end,
     canShareText = yes,
     doShareText = function(text) android.sendText(text) end,
diff --git a/frontend/device/generic/device.lua b/frontend/device/generic/device.lua
index 30d59eced..7ba982205 100644
--- a/frontend/device/generic/device.lua
+++ b/frontend/device/generic/device.lua
@@ -45,6 +45,7 @@ local Device = {
     needsTouchScreenProbe = no,
     hasClipboard = yes, -- generic internal clipboard on all devices
     hasEinkScreen = yes,
+    hasExternalSD = no, -- or other storage volume that cannot be accessed using the File Manager
     canHWDither = no,
     canHWInvert = no,
     canUseCBB = yes, -- The C BB maintains a 1:1 feature parity with the Lua BB, except that is has NO support for BB4, and limited support for BBRGB24