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Fix up textarea growing to avoid rounding issues in Chrome

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This commit is contained in:
Pavel Djundik 2019-02-05 23:15:47 +02:00
parent f3864f8295
commit d33021773c
2 changed files with 7 additions and 8 deletions
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2
client/css/style.css
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@ -1983,7 +1983,7 @@ part/quit messages where we don't load previews (adds a blank line otherwise) */
min-height: 19px; /* Required when computing input height at char deletion */
height: 19px;
max-height: 95px; /* min-height/height x number of lines maximum */
line-height: 19px /* should match height */;
line-height: 19px; /* should match height */
outline: none;
margin: 5px;
padding: 0;

13
client/js/lounge.js
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@ -82,23 +82,22 @@ $(function() {
});
function resetInputHeight(input) {
input.style.height = input.style.minHeight;
input.style.height = "";
}
const input = $("#input")
.on("input", function() {
const style = window.getComputedStyle(this);
const lineHeight = parseFloat(style.lineHeight, 10) || 1;
// Start by resetting height before computing as scrollHeight does not
// decrease when deleting characters
resetInputHeight(this);
this.style.height = Math.min(
Math.round(window.innerHeight - 100), // prevent overflow
this.scrollHeight
+ Math.round(parseFloat(style.borderTopWidth) || 0)
+ Math.round(parseFloat(style.borderBottomWidth) || 0)
) + "px";
// Use scrollHeight to calculate how many lines there are in input, and ceil the value
// because some browsers tend to incorrently round the values when using high density
// displays or using page zoom feature
this.style.height = Math.ceil(this.scrollHeight / lineHeight) * lineHeight + "px";
chat.find(".chan.active .chat").trigger("keepToBottom"); // fix growing
});