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// textarea.js
// resizeTextareas(maxWidth)
// Resizes all textareas on the page.
// minWidth = The minimum textarea width.
// maxWidth = The maximum textarea width.
function resizeTextareas(minWidth, maxWidth) {
//alert('resizeTextareas('+maxWidth+')');
var textareas = document.getElementsByTagName("textarea");
for ( $i=0; $i<textareas.length; $i++ ) {
resizeTextareaById(textareas[$i], minWidth, maxWidth)
}
}
// resizeTextarea(eName,maxWidth)
// Resizes eName textarea.
// maxWidth = The maximum textarea width.
function resizeTextarea(eName, minWidth, maxWidth) {
eId = document.getElementById(eName);
resizeTextareaById(eId,maxWidth);
}
// resizeTextareaById(eId, maxWidth)
// Called by resizeTextareas() or resizeTextarea() to resize this textarea.
function resizeTextareaById(eId, minWidth, maxWidth) {
console.log('resizeTextareaById('+eId.name+','+minWidth+','+maxWidth+')');
var width = 0; // Used to calculate the textarea's current width.
var height = 0; // Used to calculate the textarea's current height.
//var minWidth = 20; // The textarea's minimum width.
var minHeight = 5; // The textarea's minimum height.
var linelengthmodifier = 1.1; // Used to modify linelength due to font.
lines = eId.value.split('\n'); // Get an array of the textarea's lines.
//alert('name='+eId.name+' value='+eId.value);
for (var i = 0; i < lines.length; i++) { // Loop through each line.
var linelength = lines[i].length * linelengthmodifier; // Get the line length.
console.log(linelength);
if ( linelength > width ) width = linelength; // Increase width if needed.
height++; // Increment height.
}
//height *= 1.4;
if ( width > maxWidth ) { // If width too large reset it and increment height.
console.log('width='+width+' > maxWidth'+maxWidth);
width = maxWidth;
for (var i = 0; i < lines.length; i++) { // Loop through each line.
var linelength = lines[i].length; // Get the line length.
if ( linelength > width ) height++; // Increment height.
}
height++; // Increment height.
}
if ( width < minWidth ) width = minWidth; // If width too small set to minWidth.
if ( height < minHeight ) height = minHeight; // If height too small set to minHeight.
console.log('name='+eId.name+' width='+width+' height='+height);
if ( width > 0 ) eId.cols = width; // Set the textarea's width.
if ( height > 0 ) eId.rows = height; // Set the textarea's height.
}