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Fix auto-resizing of BBCode editor text box on Firefox #4

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Fix auto-resizing of BBCode editor text box on Firefox #4

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24 changes: 8 additions & 16 deletions bbcode/Editor.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,8 @@
<textarea ref="input" v-model="text" @input="onInput" v-show="!preview" :maxlength="maxlength" :placeholder="placeholder"
:class="finalClasses" @keyup="onKeyUp" :disabled="disabled" @paste="onPaste" @keypress="$emit('keypress', $event)"
:style="hasToolbar ? {'border-top-left-radius': 0} : undefined" @keydown="onKeyDown"></textarea>
<textarea ref="sizer"></textarea>
<textarea ref="sizer" :class="finalClasses"
style="height:0;min-height:0;overflow:hidden;position:absolute;top:0;visibility:hidden"></textarea>
<div class="bbcode-preview" v-show="preview">
<div class="bbcode-preview-warnings">
<div class="alert alert-danger" v-show="previewWarnings.length">
Expand Down Expand Up @@ -93,23 +94,14 @@
@Hook('mounted')
mounted(): void {
this.element = <HTMLTextAreaElement>this.$refs['input'];
const styles = getComputedStyle(this.element);
this.maxHeight = parseInt(styles.maxHeight!, 10) || 250;
this.minHeight = parseInt(styles.minHeight!, 10) || 60;
this.sizer = <HTMLTextAreaElement>this.$refs['sizer'];
setInterval(() => {
if(Date.now() - this.lastInput >= 500 && this.text !== this.undoStack[0] && this.undoIndex === 0) {
if(this.undoStack.length >= 30) this.undoStack.pop();
this.undoStack.unshift(this.text);
}
}, 500);
this.sizer = <HTMLTextAreaElement>this.$refs['sizer'];
this.sizer.style.cssText = styles.cssText;
this.sizer.style.height = '0';
this.sizer.style.minHeight = '0';
this.sizer.style.overflow = 'hidden';
this.sizer.style.position = 'absolute';
this.sizer.style.top = '0';
this.sizer.style.visibility = 'hidden';
this.resizeListener();
this.resize();
window.addEventListener('resize', this.resizeListener);
}
Expand Down Expand Up @@ -246,11 +238,11 @@
}

resize(): void {
this.sizer.style.fontSize = this.element.style.fontSize;
this.sizer.style.lineHeight = this.element.style.lineHeight;
this.sizer.style.width = `${this.element.offsetWidth}px`;
this.sizer.value = this.element.value;
this.element.style.height = `${Math.max(Math.min(this.sizer.scrollHeight, this.maxHeight), this.minHeight)}px`;
const borderHeight = this.element.offsetHeight - this.element.clientHeight;
const borderBoxHeight = this.sizer.scrollHeight + borderHeight;
this.element.style.height = `${Math.max(Math.min(borderBoxHeight, this.maxHeight), this.minHeight)}px`;
this.sizer.style.width = '0';
}

Expand Down Expand Up @@ -288,4 +280,4 @@
}
}
}
</script>
</script>