mozilla-central/devtools/client/shared/test/browser_inplace-editor_maxwidth.js (file symbol)

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/* Any copyright is dedicated to the Public Domain.
/* import-globals-from helper_inplace_editor.js */
"use strict";
loadHelperScript("helper_inplace_editor.js");
const MAX_WIDTH = 300;
const START_TEXT = "Start text";
const LONG_TEXT =
"I am a long text and I will not fit in a 300px container. " +
"I expect the inplace editor to wrap over more than two lines.";
// Test the inplace-editor behavior with a maxWidth configuration option
// defined.
add_task(async function () {
await addTab("data:text/html;charset=utf-8,inplace editor max width tests");
const { host, doc } = await createHost();
info("Testing the maxWidth option in pixels, to precisely check the size");
await new Promise(resolve => {
createInplaceEditorAndClick(
{
multiline: true,
maxWidth: MAX_WIDTH,
start: testMaxWidth,
done: resolve,
},
doc,
START_TEXT
);
});
host.destroy();
gBrowser.removeCurrentTab();
});
const testMaxWidth = async function (editor) {
is(editor.input.value, START_TEXT, "Span text content should be used");
Assert.less(
editor.input.offsetWidth,
MAX_WIDTH,
"Input width should be strictly smaller than MAX_WIDTH"
);
is(getLines(editor.input), 1, "Input should display 1 line of text");
info("Check a text is on several lines if it does not fit MAX_WIDTH");
for (const key of LONG_TEXT) {
EventUtils.sendChar(key);
checkScrollbars(editor.input);
}
is(editor.input.value, LONG_TEXT, "Long text should be the input value");
is(
editor.input.offsetWidth,
MAX_WIDTH,
"Input width should be the same as MAX_WIDTH"
);
is(getLines(editor.input), 3, "Input should display 3 lines of text");
checkScrollbars(editor.input);
info("Delete all characters on line 3.");
while (getLines(editor.input) === 3) {
EventUtils.sendKey("BACK_SPACE");
checkScrollbars(editor.input);
}
is(
editor.input.offsetWidth,
MAX_WIDTH,
"Input width should be the same as MAX_WIDTH"
);
is(getLines(editor.input), 2, "Input should display 2 lines of text");
checkScrollbars(editor.input);
info("Delete all characters on line 2.");
while (getLines(editor.input) === 2) {
EventUtils.sendKey("BACK_SPACE");
checkScrollbars(editor.input);
}
is(getLines(editor.input), 1, "Input should display 1 line of text");
checkScrollbars(editor.input);
info("Delete all characters.");
while (editor.input.value !== "") {
EventUtils.sendKey("BACK_SPACE");
checkScrollbars(editor.input);
}
Assert.less(
editor.input.offsetWidth,
MAX_WIDTH,
"Input width should again be strictly smaller than MAX_WIDTH"
);
Assert.greater(
editor.input.offsetWidth,
0,
"Even with no content, the input has a non-zero width"
);
is(getLines(editor.input), 1, "Input should display 1 line of text");
checkScrollbars(editor.input);
info("Leave the inplace-editor");
EventUtils.sendKey("RETURN");
};
/**
* Retrieve the current number of lines displayed in the provided textarea.
*
* @param {DOMNode} textarea
* @return {Number} the number of lines
*/
function getLines(textarea) {
const win = textarea.ownerDocument.defaultView;
const style = win.getComputedStyle(textarea);
return Math.floor(textarea.clientHeight / parseFloat(style.fontSize));
}
/**
* Verify that the provided textarea has no vertical or horizontal scrollbar.
*
* @param {DOMNode} textarea
*/
function checkScrollbars(textarea) {
is(
textarea.scrollHeight,
textarea.clientHeight,
"Textarea should never have vertical scrollbars"
);
is(
textarea.scrollWidth,
textarea.clientWidth,
"Textarea should never have horizontal scrollbars"
);
}