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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
// Tests that scrollIntoViewIfNeeded works properly.
const {scrollIntoViewIfNeeded} = require("devtools/client/shared/scroll");
const TEST_URI = TEST_URI_ROOT + "browser_layoutHelpers.html";
add_task(function* () {
let [host, win] = yield createHost("bottom", TEST_URI);
runTest(win);
host.destroy();
});
function runTest(win) {
let some = win.document.getElementById("some");
some.style.top = win.innerHeight + "px";
some.style.left = win.innerWidth + "px";
// The tests start with a black 2x2 pixels square below bottom right.
// Do not resize the window during the tests.
let xPos = Math.floor(win.innerWidth / 2);
// Above the viewport.
win.scroll(xPos, win.innerHeight + 2);
scrollIntoViewIfNeeded(some);
is(win.scrollY, Math.floor(win.innerHeight / 2) + 1,
"Element completely hidden above should appear centered.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// On the top edge.
win.scroll(win.innerWidth / 2, win.innerHeight + 1);
scrollIntoViewIfNeeded(some);
is(win.scrollY, win.innerHeight,
"Element partially visible above should appear above.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// Just below the viewport.
win.scroll(win.innerWidth / 2, 0);
scrollIntoViewIfNeeded(some);
is(win.scrollY, Math.floor(win.innerHeight / 2) + 1,
"Element completely hidden below should appear centered.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// On the bottom edge.
win.scroll(win.innerWidth / 2, 1);
scrollIntoViewIfNeeded(some);
is(win.scrollY, 2,
"Element partially visible below should appear below.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// Above the viewport.
win.scroll(win.innerWidth / 2, win.innerHeight + 2);
scrollIntoViewIfNeeded(some, false);
is(win.scrollY, win.innerHeight,
"Element completely hidden above should appear above " +
"if parameter is false.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// On the top edge.
win.scroll(win.innerWidth / 2, win.innerHeight + 1);
scrollIntoViewIfNeeded(some, false);
is(win.scrollY, win.innerHeight,
"Element partially visible above should appear above " +
"if parameter is false.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// Below the viewport.
win.scroll(win.innerWidth / 2, 0);
scrollIntoViewIfNeeded(some, false);
is(win.scrollY, 2,
"Element completely hidden below should appear below " +
"if parameter is false.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
// On the bottom edge.
win.scroll(win.innerWidth / 2, 1);
scrollIntoViewIfNeeded(some, false);
is(win.scrollY, 2,
"Element partially visible below should appear below " +
"if parameter is false.");
is(win.scrollX, xPos,
"scrollX position has not changed.");
}
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