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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/FloatUtils.java | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/FloatUtils.java')
-rw-r--r-- | mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/FloatUtils.java | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/FloatUtils.java b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/FloatUtils.java new file mode 100644 index 000000000..fbcd7254f --- /dev/null +++ b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/FloatUtils.java @@ -0,0 +1,43 @@ +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- + * 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.util; + +import android.graphics.PointF; + +import java.lang.IllegalArgumentException; + +public final class FloatUtils { + private FloatUtils() {} + + public static boolean fuzzyEquals(float a, float b) { + return (Math.abs(a - b) < 1e-6); + } + + public static boolean fuzzyEquals(PointF a, PointF b) { + return fuzzyEquals(a.x, b.x) && fuzzyEquals(a.y, b.y); + } + + /* + * Returns the value that represents a linear transition between `from` and `to` at time `t`, + * which is on the scale [0, 1). Thus with t = 0.0f, this returns `from`; with t = 1.0f, this + * returns `to`; with t = 0.5f, this returns the value halfway from `from` to `to`. + */ + public static float interpolate(float from, float to, float t) { + return from + (to - from) * t; + } + + /** + * Returns 'value', clamped so that it isn't any lower than 'low', and it + * isn't any higher than 'high'. + */ + public static float clamp(float value, float low, float high) { + if (high < low) { + throw new IllegalArgumentException( + "clamp called with invalid parameters (" + high + " < " + low + ")" ); + } + return Math.max(low, Math.min(high, value)); + } +} |