1 files changed, 91 insertions, 0 deletions
diff --git a/mobile/android/base/java/org/mozilla/gecko/widget/FlowLayout.java b/mobile/android/base/java/org/mozilla/gecko/widget/FlowLayout.java
new file mode 100644
index 000000000..042e74851
--- /dev/null
+++ b/mobile/android/base/java/org/mozilla/gecko/widget/FlowLayout.java
@@ -0,0 +1,91 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.widget;
+
+import org.mozilla.gecko.R;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class FlowLayout extends ViewGroup {
+    private int mSpacing;
+
+    public FlowLayout(Context context) {
+        super(context);
+    }
+
+    public FlowLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        TypedArray a = context.obtainStyledAttributes(attrs, org.mozilla.gecko.R.styleable.FlowLayout);
+        mSpacing = a.getDimensionPixelSize(R.styleable.FlowLayout_spacing, (int) context.getResources().getDimension(R.dimen.flow_layout_spacing));
+        a.recycle();
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        final int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
+        final int childCount = getChildCount();
+        int rowWidth = 0;
+        int totalWidth = 0;
+        int totalHeight = 0;
+        boolean firstChild = true;
+
+        for (int i = 0; i < childCount; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE)
+                continue;
+
+            measureChild(child, widthMeasureSpec, heightMeasureSpec);
+
+            final int childWidth = child.getMeasuredWidth();
+            final int childHeight = child.getMeasuredHeight();
+
+            if (firstChild || (rowWidth + childWidth > parentWidth)) {
+                rowWidth = 0;
+                totalHeight += childHeight;
+                if (!firstChild)
+                    totalHeight += mSpacing;
+                firstChild = false;
+            }
+
+            rowWidth += childWidth;
+
+            if (rowWidth > totalWidth)
+                totalWidth = rowWidth;
+
+            rowWidth += mSpacing;
+        }
+
+        setMeasuredDimension(totalWidth, totalHeight);
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        final int childCount = getChildCount();
+        final int totalWidth = r - l;
+        int x = 0;
+        int y = 0;
+        int prevChildHeight = 0;
+
+        for (int i = 0; i < childCount; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE)
+                continue;
+
+            final int childWidth = child.getMeasuredWidth();
+            final int childHeight = child.getMeasuredHeight();
+            if (x + childWidth > totalWidth) {
+                x = 0;
+                y += prevChildHeight + mSpacing;
+            }
+            prevChildHeight = childHeight;
+            child.layout(x, y, x + childWidth, y + childHeight);
+            x += childWidth + mSpacing;
+        }
+    }
+}