BasicBottomSheet: init

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

1 files changed, 145 insertions, 0 deletions

diff --git a/app/src/main/java/com/zeapo/pwdstore/ui/dialogs/BasicBottomSheet.kt b/app/src/main/java/com/zeapo/pwdstore/ui/dialogs/BasicBottomSheet.kt
new file mode 100644
index 00000000..5f79baf8
--- /dev/null
+++ b/app/src/main/java/com/zeapo/pwdstore/ui/dialogs/BasicBottomSheet.kt
@@ -0,0 +1,145 @@
+/*
+ * Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package com.zeapo.pwdstore.ui.dialogs
+
+import android.content.Context
+import android.graphics.drawable.GradientDrawable
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.ViewTreeObserver
+import android.widget.FrameLayout
+import androidx.annotation.StringRes
+import androidx.core.view.isVisible
+import com.google.android.material.bottomsheet.BottomSheetBehavior
+import com.google.android.material.bottomsheet.BottomSheetDialog
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+import com.zeapo.pwdstore.R
+import com.zeapo.pwdstore.databinding.BasicBottomSheetBinding
+import com.zeapo.pwdstore.utils.resolveAttribute
+import com.zeapo.pwdstore.utils.viewBinding
+
+/**
+ * [BottomSheetDialogFragment] that exposes a simple [androidx.appcompat.app.AlertDialog] like
+ * API through [Builder] to create a similar UI, just at the bottom of the screen.
+ */
+class BasicBottomSheet private constructor(
+    val title: String,
+    val message: String,
+    val positiveButtonClickListener: View.OnClickListener?,
+    val negativeButtonClickListener: View.OnClickListener?,
+) : BottomSheetDialogFragment() {
+
+    private val binding by viewBinding(BasicBottomSheetBinding::bind)
+
+    private var behavior: BottomSheetBehavior<FrameLayout>? = null
+    private val bottomSheetCallback = object : BottomSheetBehavior.BottomSheetCallback() {
+        override fun onSlide(bottomSheet: View, slideOffset: Float) {
+        }
+
+        override fun onStateChanged(bottomSheet: View, newState: Int) {
+            if (newState == BottomSheetBehavior.STATE_COLLAPSED) {
+                dismiss()
+            }
+        }
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        if (savedInstanceState != null) dismiss()
+        return layoutInflater.inflate(R.layout.basic_bottom_sheet, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        view.viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
+            override fun onGlobalLayout() {
+                view.viewTreeObserver.removeOnGlobalLayoutListener(this)
+                val dialog = dialog as BottomSheetDialog? ?: return
+                behavior = dialog.behavior
+                behavior?.apply {
+                    state = BottomSheetBehavior.STATE_EXPANDED
+                    peekHeight = 0
+                    addBottomSheetCallback(bottomSheetCallback)
+                }
+                binding.bottomSheetTitle.text = title
+                binding.bottomSheetMessage.text = message
+                if (positiveButtonClickListener != null) {
+                    binding.bottomSheetOkButton.isVisible = true
+                    binding.bottomSheetOkButton.setOnClickListener {
+                        positiveButtonClickListener.onClick(it)
+                        dismiss()
+                    }
+                }
+                if (negativeButtonClickListener != null) {
+                    binding.bottomSheetCancelButton.isVisible = true
+                    binding.bottomSheetCancelButton.setOnClickListener {
+                        negativeButtonClickListener.onClick(it)
+                        dismiss()
+                    }
+                }
+            }
+        })
+        val gradientDrawable = GradientDrawable().apply {
+            setColor(requireContext().resolveAttribute(android.R.attr.windowBackground))
+        }
+        view.background = gradientDrawable
+    }
+
+    override fun dismiss() {
+        super.dismiss()
+        behavior?.removeBottomSheetCallback(bottomSheetCallback)
+    }
+
+    class Builder(val context: Context) {
+
+        private var title: String? = null
+        private var message: String? = null
+        private var positiveButtonClickListener: View.OnClickListener? = null
+        private var negativeButtonClickListener: View.OnClickListener? = null
+
+        fun setTitleRes(@StringRes titleRes: Int): Builder {
+            this.title = context.resources.getString(titleRes)
+            return this
+        }
+
+        fun setTitle(title: String): Builder {
+            this.title = title
+            return this
+        }
+
+        fun setMessageRes(@StringRes messageRes: Int): Builder {
+            this.message = context.resources.getString(messageRes)
+            return this
+        }
+
+        fun setMessage(message: String): Builder {
+            this.message = message
+            return this
+        }
+
+        fun setPositiveButtonClickListener(listener: View.OnClickListener): Builder {
+            this.positiveButtonClickListener = listener
+            return this
+        }
+
+        fun setNegativeButtonClickListener(listener: View.OnClickListener): Builder {
+            this.negativeButtonClickListener = listener
+            return this
+        }
+
+        fun build(): BasicBottomSheet {
+            require(title != null) { "Title needs to be set" }
+            require(message != null) { "Message needs to be set" }
+            return BasicBottomSheet(
+                title!!,
+                message!!,
+                positiveButtonClickListener,
+                negativeButtonClickListener
+            )
+        }
+    }
+}