Move basic views to new module

10 files changed, 468 insertions, 0 deletions

diff --git a/ui/common/README.md b/ui/common/README.md
new file mode 100644
index 000000000..d96f1cf55
--- /dev/null
+++ b/ui/common/README.md
@@ -0,0 +1,3 @@
+# :ui:common
+
+This module provides basic UI functionality that is needed in multiple modules. UI elements that are only used in a single module should not be defined here.
diff --git a/ui/common/build.gradle b/ui/common/build.gradle
new file mode 100644
index 000000000..fabd8937f
--- /dev/null
+++ b/ui/common/build.gradle
@@ -0,0 +1,50 @@
+apply plugin: "com.android.library"
+
+android {
+    compileSdkVersion rootProject.ext.compileSdkVersion
+
+    defaultConfig {
+        minSdkVersion rootProject.ext.minSdkVersion
+        targetSdkVersion rootProject.ext.targetSdkVersion
+
+        multiDexEnabled false
+
+        testApplicationId "de.danoeh.antennapod.core.tests"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile("proguard-android.txt")
+        }
+        debug {
+            // debug build has method count over 64k single-dex threshold.
+            // For building debug build to use on Android < 21 (pre-Android 5) devices,
+            // you need to manually change class
+            // de.danoeh.antennapod.PodcastApp to extend MultiDexApplication .
+            // See Issue #2813
+            multiDexEnabled true
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
+
+    lintOptions {
+        warningsAsErrors true
+        abortOnError true
+    }
+}
+
+dependencies {
+    annotationProcessor "androidx.annotation:annotation:$annotationVersion"
+    implementation "androidx.appcompat:appcompat:$appcompatVersion"
+}
diff --git a/ui/common/src/main/AndroidManifest.xml b/ui/common/src/main/AndroidManifest.xml
new file mode 100644
index 000000000..bae316f55
--- /dev/null
+++ b/ui/common/src/main/AndroidManifest.xml
@@ -0,0 +1 @@
+<manifest package="de.danoeh.antennapod.ui.common" />
diff --git a/ui/common/src/main/java/de/danoeh/antennapod/ui/common/CircularProgressBar.java b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/CircularProgressBar.java
new file mode 100644
index 000000000..a693c28b0
--- /dev/null
+++ b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/CircularProgressBar.java
@@ -0,0 +1,95 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.view.View;
+import androidx.annotation.Nullable;
+
+public class CircularProgressBar extends View {
+    public static final float MINIMUM_PERCENTAGE = 0.005f;
+    public static final float MAXIMUM_PERCENTAGE = 1 - MINIMUM_PERCENTAGE;
+
+    private final Paint paintBackground = new Paint();
+    private final Paint paintProgress = new Paint();
+    private float percentage = 0;
+    private float targetPercentage = 0;
+    private Object tag = null;
+    private final RectF bounds = new RectF();
+
+    public CircularProgressBar(Context context) {
+        super(context);
+        setup(null);
+    }
+
+    public CircularProgressBar(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        setup(attrs);
+    }
+
+    public CircularProgressBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        setup(attrs);
+    }
+
+    private void setup(@Nullable AttributeSet attrs) {
+        paintBackground.setAntiAlias(true);
+        paintBackground.setStyle(Paint.Style.STROKE);
+
+        paintProgress.setAntiAlias(true);
+        paintProgress.setStyle(Paint.Style.STROKE);
+        paintProgress.setStrokeCap(Paint.Cap.ROUND);
+
+        TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.CircularProgressBar);
+        int color = typedArray.getColor(R.styleable.CircularProgressBar_foregroundColor, Color.GREEN);
+        typedArray.recycle();
+        paintProgress.setColor(color);
+        paintBackground.setColor(color);
+    }
+
+    /**
+     * Sets the percentage to be displayed.
+     * @param percentage Number from 0 to 1
+     * @param tag When the tag is the same as last time calling setPercentage, the update is animated
+     */
+    public void setPercentage(float percentage, Object tag) {
+        targetPercentage = percentage;
+
+        if (tag == null || !tag.equals(this.tag)) {
+            // Do not animate
+            this.percentage = percentage;
+            this.tag = tag;
+        }
+        invalidate();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        float padding = getHeight() * 0.07f;
+        paintBackground.setStrokeWidth(getHeight() * 0.02f);
+        paintProgress.setStrokeWidth(padding);
+        bounds.set(padding, padding, getWidth() - padding, getHeight() - padding);
+        canvas.drawArc(bounds, 0, 360, false, paintBackground);
+
+        if (MINIMUM_PERCENTAGE <= percentage && percentage <= MAXIMUM_PERCENTAGE) {
+            canvas.drawArc(bounds, -90, percentage * 360, false, paintProgress);
+        }
+
+        if (Math.abs(percentage - targetPercentage) > MINIMUM_PERCENTAGE) {
+            float speed = 0.02f;
+            if (Math.abs(targetPercentage - percentage) < 0.1 && targetPercentage > percentage) {
+                speed = 0.006f;
+            }
+            float delta = Math.min(speed, Math.abs(targetPercentage - percentage));
+            float direction = ((targetPercentage - percentage) > 0 ? 1f : -1f);
+            percentage += delta * direction;
+            invalidate();
+        }
+    }
+}
diff --git a/ui/common/src/main/java/de/danoeh/antennapod/ui/common/PlaybackSpeedIndicatorView.java b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/PlaybackSpeedIndicatorView.java
new file mode 100644
index 000000000..c93ca01f5
--- /dev/null
+++ b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/PlaybackSpeedIndicatorView.java
@@ -0,0 +1,113 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.view.View;
+import androidx.annotation.Nullable;
+
+public class PlaybackSpeedIndicatorView extends View {
+    private static final float DEG_2_RAD = (float) (Math.PI / 180);
+    private static final float PADDING_ANGLE = 30;
+    private static final float VALUE_UNSET = -4242;
+
+    private final Paint arcPaint = new Paint();
+    private final Paint indicatorPaint = new Paint();
+    private final Path trianglePath = new Path();
+    private final RectF arcBounds = new RectF();
+    private float angle = VALUE_UNSET;
+    private float targetAngle = VALUE_UNSET;
+    private float degreePerFrame = 2;
+    private float paddingArc = 20;
+    private float paddingIndicator = 10;
+
+    public PlaybackSpeedIndicatorView(Context context) {
+        super(context);
+        setup(null);
+    }
+
+    public PlaybackSpeedIndicatorView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        setup(attrs);
+    }
+
+    public PlaybackSpeedIndicatorView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        setup(attrs);
+    }
+
+    private void setup(@Nullable AttributeSet attrs) {
+        setSpeed(1.0f); // Set default angle to 1.0
+        targetAngle = VALUE_UNSET; // Do not move to first value that is set externally
+
+        TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.PlaybackSpeedIndicatorView);
+        int color = typedArray.getColor(R.styleable.PlaybackSpeedIndicatorView_foregroundColor, Color.GREEN);
+        typedArray.recycle();
+        arcPaint.setColor(color);
+        indicatorPaint.setColor(color);
+
+        arcPaint.setAntiAlias(true);
+        arcPaint.setStyle(Paint.Style.STROKE);
+        arcPaint.setStrokeCap(Paint.Cap.ROUND);
+
+        indicatorPaint.setAntiAlias(true);
+        indicatorPaint.setStyle(Paint.Style.FILL);
+
+        trianglePath.setFillType(Path.FillType.EVEN_ODD);
+    }
+
+    public void setSpeed(float value) {
+        float maxAnglePerDirection = 90 + 45 - 2 * paddingArc;
+        // Speed values above 3 are probably not too common. Cap at 3 for better differentiation
+        float normalizedValue = Math.min(2.5f, value - 0.5f) / 2.5f; // Linear between 0 and 1
+        float target = -maxAnglePerDirection + 2 * maxAnglePerDirection * normalizedValue;
+        if (targetAngle == VALUE_UNSET) {
+            angle = target;
+        }
+        targetAngle = target;
+        degreePerFrame = Math.abs(targetAngle - angle) / 20;
+        invalidate();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        paddingArc = getMeasuredHeight() / 4.5f;
+        paddingIndicator = getMeasuredHeight() / 6f;
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        float radiusInnerCircle = getWidth() / 10f;
+        canvas.drawCircle(getWidth() / 2f, getHeight() / 2f, radiusInnerCircle, indicatorPaint);
+
+        trianglePath.rewind();
+        float bigRadius = getHeight() / 2f - paddingIndicator;
+        trianglePath.moveTo(getWidth() / 2f + (float) (bigRadius * Math.sin((-angle + 180) * DEG_2_RAD)),
+                getHeight() / 2f + (float) (bigRadius * Math.cos((-angle + 180) * DEG_2_RAD)));
+        trianglePath.lineTo(getWidth() / 2f + (float) (radiusInnerCircle * Math.sin((-angle + 180 - 90) * DEG_2_RAD)),
+                getHeight() / 2f + (float) (radiusInnerCircle * Math.cos((-angle + 180 - 90) * DEG_2_RAD)));
+        trianglePath.lineTo(getWidth() / 2f + (float) (radiusInnerCircle * Math.sin((-angle + 180 + 90) * DEG_2_RAD)),
+                getHeight() / 2f + (float) (radiusInnerCircle * Math.cos((-angle + 180 + 90) * DEG_2_RAD)));
+        trianglePath.close();
+        canvas.drawPath(trianglePath, indicatorPaint);
+
+        arcPaint.setStrokeWidth(getHeight() / 15f);
+        arcBounds.set(paddingArc, paddingArc, getWidth() - paddingArc, getHeight() - paddingArc);
+        canvas.drawArc(arcBounds, -180 - 45, 90 + 45 + angle - PADDING_ANGLE, false, arcPaint);
+        canvas.drawArc(arcBounds, -90 + PADDING_ANGLE + angle, 90 + 45 - PADDING_ANGLE - angle, false, arcPaint);
+
+        if (Math.abs(angle - targetAngle) > 0.5 && targetAngle != VALUE_UNSET) {
+            angle += Math.signum(targetAngle - angle) * Math.min(degreePerFrame, Math.abs(targetAngle - angle));
+            invalidate();
+        }
+    }
+}
diff --git a/ui/common/src/main/java/de/danoeh/antennapod/ui/common/RecursiveRadioGroup.java b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/RecursiveRadioGroup.java
new file mode 100644
index 000000000..94ef73ffc
--- /dev/null
+++ b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/RecursiveRadioGroup.java
@@ -0,0 +1,67 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.RadioButton;
+import java.util.ArrayList;
+
+/**
+ * An alternative to {@link android.widget.RadioGroup} that allows to nest children.
+ * Basend on https://stackoverflow.com/a/14309274.
+ */
+public class RecursiveRadioGroup extends LinearLayout {
+    private final ArrayList<RadioButton> radioButtons = new ArrayList<>();
+    private RadioButton checkedButton = null;
+
+    public RecursiveRadioGroup(Context context) {
+        super(context);
+    }
+
+    public RecursiveRadioGroup(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public RecursiveRadioGroup(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    public void addView(View child, int index, ViewGroup.LayoutParams params) {
+        super.addView(child, index, params);
+        parseChild(child);
+    }
+
+    public void parseChild(final View child) {
+        if (child instanceof RadioButton) {
+            RadioButton button = (RadioButton) child;
+            radioButtons.add(button);
+            button.setOnCheckedChangeListener((buttonView, isChecked) -> {
+                if (!isChecked) {
+                    return;
+                }
+                checkedButton = (RadioButton) buttonView;
+
+                for (RadioButton view : radioButtons) {
+                    if (view != buttonView) {
+                        view.setChecked(false);
+                    }
+                }
+            });
+        } else if (child instanceof ViewGroup) {
+            parseChildren((ViewGroup) child);
+        }
+    }
+
+    public void parseChildren(final ViewGroup child) {
+        for (int i = 0; i < child.getChildCount(); i++) {
+            parseChild(child.getChildAt(i));
+        }
+    }
+
+    public RadioButton getCheckedButton() {
+        return checkedButton;
+    }
+}
diff --git a/ui/common/src/main/java/de/danoeh/antennapod/ui/common/SquareImageView.java b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/SquareImageView.java
new file mode 100644
index 000000000..dce15af18
--- /dev/null
+++ b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/SquareImageView.java
@@ -0,0 +1,61 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import androidx.appcompat.widget.AppCompatImageView;
+import android.util.AttributeSet;
+
+/**
+ * From http://stackoverflow.com/a/19449488/6839
+ */
+public class SquareImageView extends AppCompatImageView {
+    public static final int DIRECTION_WIDTH = 0;
+    public static final int DIRECTION_HEIGHT = 1;
+    public static final int DIRECTION_MINIMUM = 2;
+
+    private int direction = DIRECTION_WIDTH;
+
+    public SquareImageView(Context context) {
+        super(context);
+    }
+
+    public SquareImageView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        loadAttrs(context, attrs);
+    }
+
+    public SquareImageView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        loadAttrs(context, attrs);
+    }
+
+    private void loadAttrs(Context context, AttributeSet attrs) {
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SquareImageView);
+        direction = a.getInt(R.styleable.SquareImageView_direction, DIRECTION_WIDTH);
+        a.recycle();
+    }
+
+    public void setDirection(int direction) {
+        this.direction = direction;
+        requestLayout();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        switch (direction) {
+            case DIRECTION_MINIMUM:
+                int size = Math.min(getMeasuredWidth(), getMeasuredHeight());
+                setMeasuredDimension(size, size);
+                break;
+            case DIRECTION_HEIGHT:
+                setMeasuredDimension(getMeasuredHeight(), getMeasuredHeight());
+                break;
+            default:
+                setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());
+                break;
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/ui/common/src/main/java/de/danoeh/antennapod/ui/common/ThemeUtils.java b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/ThemeUtils.java
new file mode 100644
index 000000000..392d09e07
--- /dev/null
+++ b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/ThemeUtils.java
@@ -0,0 +1,25 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import androidx.annotation.AttrRes;
+import androidx.annotation.ColorInt;
+import android.util.TypedValue;
+import androidx.annotation.DrawableRes;
+
+public class ThemeUtils {
+    private ThemeUtils() {
+
+    }
+
+    public static @ColorInt int getColorFromAttr(Context context, @AttrRes int attr) {
+        TypedValue typedValue = new TypedValue();
+        context.getTheme().resolveAttribute(attr, typedValue, true);
+        return typedValue.data;
+    }
+
+    public static @DrawableRes int getDrawableFromAttr(Context context, @AttrRes int attr) {
+        TypedValue typedValue = new TypedValue();
+        context.getTheme().resolveAttribute(attr, typedValue, true);
+        return typedValue.resourceId;
+    }
+}
diff --git a/ui/common/src/main/java/de/danoeh/antennapod/ui/common/WrappingGridView.java b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/WrappingGridView.java
new file mode 100644
index 000000000..4c8bb994c
--- /dev/null
+++ b/ui/common/src/main/java/de/danoeh/antennapod/ui/common/WrappingGridView.java
@@ -0,0 +1,35 @@
+package de.danoeh.antennapod.ui.common;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.GridView;
+
+/**
+ * Source: https://stackoverflow.com/a/46350213/
+ */
+public class WrappingGridView extends GridView {
+
+    public WrappingGridView(Context context) {
+        super(context);
+    }
+
+    public WrappingGridView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public WrappingGridView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        int heightSpec = heightMeasureSpec;
+        if (getLayoutParams().height == LayoutParams.WRAP_CONTENT) {
+            // The great Android "hackatlon", the love, the magic.
+            // The two leftmost bits in the height measure spec have
+            // a special meaning, hence we can't use them to describe height.
+            heightSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
+        }
+        super.onMeasure(widthMeasureSpec, heightSpec);
+    }
+}
diff --git a/ui/common/src/main/res/values/styleable.xml b/ui/common/src/main/res/values/styleable.xml
new file mode 100644
index 000000000..3542cc1b5
--- /dev/null
+++ b/ui/common/src/main/res/values/styleable.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <declare-styleable name="SquareImageView">
+        <attr name="direction" format="enum">
+            <enum name="width" value="0"/>
+            <enum name="height" value="1"/>
+            <enum name="minimum" value="2"/>
+        </attr>
+    </declare-styleable>
+
+    <declare-styleable name="CircularProgressBar">
+        <attr name="foregroundColor" format="color" />
+    </declare-styleable>
+
+    <declare-styleable name="PlaybackSpeedIndicatorView">
+        <attr name="foregroundColor" /> <!-- format omitted to avoid double definition -->
+    </declare-styleable>
+</resources>