rooms-android/app/src/main/java/com/nextcloud/talk/activities/FullScreenTextViewerActivity.kt

/*
 * Nextcloud Talk application
 *
 * @author Marcel Hibbe
 * @author Andy Scherzinger
 * Copyright (C) 2021 Andy Scherzinger <info@andy-scherzinger.de>
 * Copyright (C) 2021 Marcel Hibbe <dev@mhibbe.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.nextcloud.talk.activities

import android.content.Intent
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import androidx.activity.OnBackPressedCallback
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.FileProvider
import androidx.core.content.res.ResourcesCompat
import autodagger.AutoInjector
import com.nextcloud.talk.BuildConfig
import com.nextcloud.talk.R
import com.nextcloud.talk.application.NextcloudTalkApplication
import com.nextcloud.talk.databinding.ActivityFullScreenTextBinding
import com.nextcloud.talk.ui.theme.ViewThemeUtils
import com.nextcloud.talk.utils.DisplayUtils
import com.nextcloud.talk.utils.Mimetype.TEXT_PREFIX_GENERIC
import io.noties.markwon.Markwon
import java.io.File
import javax.inject.Inject

@AutoInjector(NextcloudTalkApplication::class)
class FullScreenTextViewerActivity : AppCompatActivity() {
    lateinit var binding: ActivityFullScreenTextBinding

    private val callback = object : OnBackPressedCallback(true) {
        override fun handleOnBackPressed() {
            finish()
        }
    }

    @Inject
    lateinit var viewThemeUtils: ViewThemeUtils

    private lateinit var path: String

    override fun onCreateOptionsMenu(menu: Menu): Boolean {
        menuInflater.inflate(R.menu.menu_preview, menu)
        return true
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        return if (item.itemId == android.R.id.home) {
            // onBackPressed()
            onBackPressedDispatcher.addCallback(this, callback)
            true
        } else if (item.itemId == R.id.share) {
            val shareUri = FileProvider.getUriForFile(
                this,
                BuildConfig.APPLICATION_ID,
                File(path)
            )

            val shareIntent: Intent = Intent().apply {
                action = Intent.ACTION_SEND
                putExtra(Intent.EXTRA_STREAM, shareUri)
                type = TEXT_PREFIX_GENERIC
                addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
            }
            startActivity(Intent.createChooser(shareIntent, resources.getText(R.string.send_to)))

            true
        } else {
            super.onOptionsItemSelected(item)
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        NextcloudTalkApplication.sharedApplication!!.componentApplication.inject(this)

        binding = ActivityFullScreenTextBinding.inflate(layoutInflater)
        setContentView(binding.root)

        setSupportActionBar(binding.textviewToolbar)

        val fileName = intent.getStringExtra("FILE_NAME")
        val isMarkdown = intent.getBooleanExtra("IS_MARKDOWN", false)
        path = applicationContext.cacheDir.absolutePath + "/" + fileName
        val text = readFile(path)

        if (isMarkdown) {
            val markwon = Markwon.create(applicationContext)
            markwon.setMarkdown(binding.textView, text)
        } else {
            binding.textView.text = text
        }

        supportActionBar?.title = fileName
        supportActionBar?.setDisplayHomeAsUpEnabled(true)

        viewThemeUtils.platform.themeStatusBar(this)
        viewThemeUtils.material.themeToolbar(binding.textviewToolbar)
        viewThemeUtils.material.colorToolbarOverflowIcon(binding.textviewToolbar)

        if (resources != null) {
            DisplayUtils.applyColorToNavigationBar(
                this.window,
                ResourcesCompat.getColor(resources, R.color.bg_default, null)
            )
        }
    }

    private fun readFile(fileName: String) = File(fileName).inputStream().readBytes().toString(Charsets.UTF_8)
}