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<!-- Please describe your changes on the following line: --> --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors - [x] These changes fix #12120 <!-- Either: --> - [x] There are tests for these changes OR <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> r? @SimonSapin for the style changes, @Ms2ger or @jdm for the dom and test changes Source-Repo: https://github.com/servo/servo Source-Revision: 14aeccc33ab44d706df86fbce67339218efe710c
59 lines
1.7 KiB
Rust
59 lines
1.7 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use time;
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/// The `TimerMode` is used to determine what time should the `Timer` return,
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/// either a fixed value (in the `Test` mode), or the actual time (in the
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/// `Current` mode).
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#[derive(Debug, Clone)]
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enum TimerMode {
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Test(f64),
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Current,
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}
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/// A `Timer` struct that takes care of giving the current time for animations.
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///
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/// This is needed to be allowed to hook the time in the animations' test-mode.
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#[derive(Debug, Clone)]
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pub struct Timer {
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mode: TimerMode,
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}
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impl Timer {
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/// Creates a new "normal" timer, i.e., a "Current" mode timer.
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#[inline]
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pub fn new() -> Self {
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Timer {
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mode: TimerMode::Current,
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}
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}
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/// Creates a new "test mode" timer, with initial time 0.
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#[inline]
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pub fn test_mode() -> Self {
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Timer {
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mode: TimerMode::Test(0.),
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}
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}
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/// Returns the current time, at least from the caller's perspective. In
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/// test mode returns whatever the value is.
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pub fn seconds(&self) -> f64 {
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match self.mode {
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TimerMode::Test(test_value) => test_value,
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TimerMode::Current => time::precise_time_s(),
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}
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}
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/// Increments the current clock. Panics if the clock is not on test mode.
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pub fn increment(&mut self, by: f64) {
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match self.mode {
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TimerMode::Test(ref mut val)
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=> *val += by,
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TimerMode::Current
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=> panic!("Timer::increment called for a non-test mode timer. This is a bug."),
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}
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}
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}
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