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/* Any copyright is dedicated to the Public Domain.
"use strict";
// Test that editor scrolls to correct line if it's selected with
// * selectStyleSheet (specified line)
// * click on the sidebar item (line before the editor was unselected)
const SIMPLE = TEST_BASE_HTTP + "simple.css";
const LONG = TEST_BASE_HTTP + "doc_long.css";
const DOCUMENT_WITH_LONG_SHEET =
"data:text/html;charset=UTF-8," +
encodeURIComponent(
[
"<!DOCTYPE html>",
"<html>",
" <head>",
" <title>Editor scroll test page</title>",
' <link rel="stylesheet" type="text/css" href="' + SIMPLE + '">',
' <link rel="stylesheet" type="text/css" href="' + LONG + '">',
" </head>",
" <body>Editor scroll test page</body>",
"</html>",
].join("\n")
);
const LINE_TO_SELECT = 201;
add_task(async function () {
const { ui } = await openStyleEditorForURL(DOCUMENT_WITH_LONG_SHEET);
is(ui.editors.length, 2, "Two editors present.");
const simpleEditor = ui.editors[0];
const longEditor = ui.editors[1];
info(`Selecting doc_long.css and scrolling to line ${LINE_TO_SELECT}`);
// We need to wait for editor-selected if we want to check the scroll
// position as scrolling occurs after selectStyleSheet resolves but before the
// event is emitted.
let selectEventPromise = waitForEditorToBeSelected(longEditor, ui);
await ui.selectStyleSheet(longEditor.styleSheet, LINE_TO_SELECT);
await selectEventPromise;
info("Checking that the correct line is visible after initial load");
const { from, to } = longEditor.sourceEditor.getViewport();
info(`Lines ${from}-${to} are visible (expected ${LINE_TO_SELECT}).`);
Assert.lessOrEqual(from, LINE_TO_SELECT, "The editor scrolled too much.");
Assert.greaterOrEqual(to, LINE_TO_SELECT, "The editor scrolled too little.");
const initialScrollTop = longEditor.sourceEditor.getScrollInfo().top;
info(`Storing scrollTop = ${initialScrollTop} for later comparison.`);
info("Selecting the first editor (simple.css)");
await ui.selectStyleSheet(simpleEditor.styleSheet);
info("Selecting doc_long.css again.");
selectEventPromise = waitForEditorToBeSelected(longEditor, ui);
// Can't use ui.selectStyleSheet here as it will scroll the editor back to top
// and we want to check that the previous scroll position is restored.
const summary = await ui.getEditorSummary(longEditor);
summary.click();
info("Waiting for doc_long.css to be selected.");
await selectEventPromise;
const scrollTop = longEditor.sourceEditor.getScrollInfo().top;
is(
scrollTop,
initialScrollTop,
"Scroll top was restored after the sheet was selected again."
);
});
/**
* A helper that waits "editor-selected" event for given editor.
*
* @param {StyleSheetEditor} editor
* The editor to wait for.
* @param {StyleEditorUI} ui
* The StyleEditorUI the editor belongs to.
*/
var waitForEditorToBeSelected = async function (editor, ui) {
info(`Waiting for ${editor.friendlyName} to be selected.`);
let selected = await ui.once("editor-selected");
while (selected != editor) {
info(`Ignored editor-selected for editor ${editor.friendlyName}.`);
selected = await ui.once("editor-selected");
}
info(`Got editor-selected for ${editor.friendlyName}.`);
};