Merge pull request #719 from esensar/feature/712-password-protected-pdf

Support opening password protected PDF files

app/build.gradle

@@ -64,7 +64,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.github.SimpleMobileTools:Simple-Commons:84c71fdcc1'
+    implementation 'com.github.SimpleMobileTools:Simple-Commons:a8693482e8'
     implementation 'com.github.tibbi:AndroidPdfViewer:e6a533125b'
     implementation 'com.github.Stericson:RootTools:df729dcb13'
     implementation 'com.github.Stericson:RootShell:1.6'

app/src/main/kotlin/com/simplemobiletools/filemanager/pro/activities/PDFViewerActivity.kt

@@ -3,12 +3,15 @@ package com.simplemobiletools.filemanager.pro.activities
 import android.content.Context
 import android.content.res.Configuration
 import android.graphics.Color
+import android.net.Uri
 import android.os.Bundle
 import android.print.PrintAttributes
 import android.print.PrintManager
 import android.view.WindowManager
 import android.widget.RelativeLayout
 import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle
+import com.shockwave.pdfium.PdfPasswordException
+import com.simplemobiletools.commons.dialogs.EnterPasswordDialog
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.REAL_FILE_PATH
 import com.simplemobiletools.commons.helpers.isPiePlus
@@ -16,11 +19,15 @@ import com.simplemobiletools.filemanager.pro.R
 import com.simplemobiletools.filemanager.pro.extensions.hideSystemUI
 import com.simplemobiletools.filemanager.pro.extensions.showSystemUI
 import com.simplemobiletools.filemanager.pro.helpers.PdfDocumentAdapter
-import kotlinx.android.synthetic.main.activity_pdf_viewer.*
+import kotlinx.android.synthetic.main.activity_pdf_viewer.pdf_viewer
+import kotlinx.android.synthetic.main.activity_pdf_viewer.pdf_viewer_appbar
+import kotlinx.android.synthetic.main.activity_pdf_viewer.pdf_viewer_toolbar
+import kotlinx.android.synthetic.main.activity_pdf_viewer.top_shadow
 
 class PDFViewerActivity : SimpleActivity() {
     private var realFilePath = ""
     private var isFullScreen = false
+    private var passwordDialog: EnterPasswordDialog? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         showTransparentTop = true
@@ -91,16 +98,42 @@ class PDFViewerActivity : SimpleActivity() {
             return
         }
 
+        loadPdfViewer(uri)
+    }
+
+    private fun loadPdfViewer(uri: Uri, filePassword: String? = null) {
         val primaryColor = getProperPrimaryColor()
         pdf_viewer.setBackgroundColor(getProperBackgroundColor())
         pdf_viewer.fromUri(uri)
+            .password(filePassword)
             .scrollHandle(DefaultScrollHandle(this, primaryColor.getContrastColor(), primaryColor))
             .spacing(15)
             .onTap { toggleFullScreen() }
             .onError {
+                if (it is PdfPasswordException) {
+                    // already entered a password and it was wrong
+                    if (filePassword != null) {
+                        toast(getString(R.string.invalid_password))
+                        passwordDialog?.clearPassword()
+                    } else {
+                        passwordDialog = EnterPasswordDialog(
+                            this,
+                            callback = { password ->
+                                loadPdfViewer(uri, password)
+                            },
+                            cancelCallback = {
+                                finish()
+                            }
+                        )
+                    }
+                } else {
                     showErrorToast(it.localizedMessage?.toString() ?: getString(R.string.unknown_error_occurred))
                     finish()
                 }
+            }
+            .onLoad {
+                passwordDialog?.dismiss(notify = false)
+            }
             .load()
 
         showSystemUI(true)