From 4857e97e306a881f42c1ec6f8a89df4620ab1fe6 Mon Sep 17 00:00:00 2001
From: ezdiy <ezdiy@outlook.com>
Date: Tue, 1 Sep 2020 21:43:21 +0200
Subject: [PATCH] Pocketbook: Launcher OS integration (#6620)

* Bring in restart koreader & shutdown device exit options
* Existing instance reused for opens via native book explorer
---
 frontend/device/pocketbook/device.lua | 22 ++++++++++++++++++++--
 platform/pocketbook/koreader.app      | 25 +++++++++++++++++++++----
 reader.lua                            |  8 ++++++++
 3 files changed, 49 insertions(+), 6 deletions(-)

diff --git a/frontend/device/pocketbook/device.lua b/frontend/device/pocketbook/device.lua
index 5176788b6..5185b8993 100644
--- a/frontend/device/pocketbook/device.lua
+++ b/frontend/device/pocketbook/device.lua
@@ -29,8 +29,7 @@ local PocketBook = Generic:new{
     hasKeys = yes,
     hasFrontlight = yes,
     canSuspend = no,
-    hasExitOptions = no,
-    canRestart = no,
+    canPowerOff = yes,
     needsScreenRefreshAfterResume = no,
     home_dir = "/mnt/ext1",
 
@@ -55,6 +54,20 @@ function PocketBook:blacklistCBB()
     end
 end
 
+-- Helper to try load externally signalled book whenever we're brought to foreground
+local function tryOpenBook()
+    local path = os.getenv("KO_PATH_OPEN_BOOK")
+    if not path then return end
+    local fi = io.open(path, "r")
+    if not fi then return end
+    local fn = fi:read("*line")
+    fi:close()
+    os.remove(path)
+    if fn and util.pathExists(fn) then
+        require("apps/reader/readerui"):showReader(fn)
+    end
+end
+
 function PocketBook:init()
     -- Blacklist the C BB before the first BB require...
     self:blacklistCBB()
@@ -89,6 +102,7 @@ function PocketBook:init()
                     return "Suspend"
                 end
             elseif ev.code == C.EVT_FOREGROUND or ev.code == C.EVT_SHOW then
+                tryOpenBook()
                 ui:setDirty('all', 'partial')
                 if quasiSuspended then
                     quasiSuspended = false
@@ -210,6 +224,10 @@ function PocketBook:setAutoStandby(isAllowed)
     inkview.iv_sleepmode(isAllowed and 1 or 0)
 end
 
+function PocketBook:powerOff()
+    inkview.PowerOff()
+end
+
 function PocketBook:initNetworkManager(NetworkMgr)
     function NetworkMgr:turnOnWifi(complete_callback)
         if inkview.NetConnect(nil) ~= C.NET_OK then
diff --git a/platform/pocketbook/koreader.app b/platform/pocketbook/koreader.app
index 85faff8be..8d6c1ea24 100755
--- a/platform/pocketbook/koreader.app
+++ b/platform/pocketbook/koreader.app
@@ -4,6 +4,19 @@ export LC_ALL="en_US.UTF-8"
 # working directory of koreader
 KOREADER_DIR=/mnt/ext1/applications/koreader
 
+# file through which we communicate instanced opens
+export KO_PATH_OPEN_BOOK=/tmp/.koreader.open
+
+# check for and notify a running instance
+INSTANCE_PID=$(cat /tmp/koreader.pid 2> /dev/null)
+if [ "${INSTANCE_PID}" != "" ] && [ -e "/proc/${INSTANCE_PID}" ]; then
+    echo "$@" > "${KO_PATH_OPEN_BOOK}"
+    exec /usr/bin/iv2sh SetActiveTask "${INSTANCE_PID}" 0
+fi
+
+# we're first, so publish our instance
+echo $$ > /tmp/koreader.pid
+
 # update to new version from OTA directory
 NEWUPDATE="${KOREADER_DIR}/ota/koreader.updated.tar"
 INSTALLED="${KOREADER_DIR}/ota/koreader.installed.tar"
@@ -39,14 +52,18 @@ if [ -e crash.log ]; then
     mv -f crash.log.new crash.log
 fi
 
-RETURN_VALUE=85
-while [ ${RETURN_VALUE} -eq 85 ]; do
+export KO_EXIT_CODE="/tmp/.koreader.exit"
+RETURN_VALUE="85"
+while [ "${RETURN_VALUE}" = "85" ]; do
+    rm -f "${KO_EXIT_CODE}"
     ./reader.lua "${args}" >>crash.log 2>&1
-    RETURN_VALUE=$?
+    RETURN_VALUE=$(cat ${KO_EXIT_CODE})
 done
 
+rm -f /tmp/koreader.pid
+
 if pidof reader.lua >/dev/null 2>&1; then
     killall -TERM reader.lua
 fi
 
-exit ${RETURN_VALUE}
+exit "${RETURN_VALUE}"
diff --git a/reader.lua b/reader.lua
index c9ea466cd..d89790a9f 100755
--- a/reader.lua
+++ b/reader.lua
@@ -321,6 +321,14 @@ end
 
 -- Exit
 local function exitReader()
+    -- Exit code can be shoddy on some platforms due to broken library dtors calling _exit(0) from os.exit(N)
+    local ko_exit = os.getenv("KO_EXIT_CODE")
+    if ko_exit then
+        local fo = io.open(ko_exit, "w+")
+        fo:write(tostring(exit_code))
+        fo:close()
+    end
+
     local ReaderActivityIndicator =
         require("apps/reader/modules/readeractivityindicator")