60 lines
1.9 KiB
JavaScript
60 lines
1.9 KiB
JavaScript
/*\
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title: $:/core/modules/editor/operations/text/prefix-lines.js
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type: application/javascript
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module-type: texteditoroperation
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Text editor operation to add a prefix to the selected lines
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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exports["prefix-lines"] = function(event,operation) {
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// Cut just past the preceding line break, or the start of the text
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operation.cutStart = $tw.utils.findPrecedingLineBreak(operation.text,operation.selStart);
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// Cut to just past the following line break, or to the end of the text
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operation.cutEnd = $tw.utils.findFollowingLineBreak(operation.text,operation.selEnd);
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// Process each line
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var lines = operation.text.substring(operation.cutStart,operation.cutEnd).split(/\r?\n/mg);
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$tw.utils.each(lines,function(line,index) {
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// Compose the required prefix
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var prefix = event.paramObject.character.repeat(event.paramObject.count);
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// Check if we already have the required prefix
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if(line.substring(0,prefix.length) === prefix) {
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// If so, remove the prefix
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line = line.substring(prefix.length);
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// Remove any whitespace
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while(line.charAt(0) === " ") {
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line = line.substring(1);
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}
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} else {
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// If we didn't have the prefix, remove any existing prefix characters
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while(line.charAt(0) === event.paramObject.character) {
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line = line.substring(1);
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}
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// Remove any whitespace
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while(line.charAt(0) === " ") {
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line = line.substring(1);
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}
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// Apply the prefix
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line = prefix + " " + line;
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}
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// Save the modified line
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lines[index] = line;
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});
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// Stitch the replacement text together and set the selection
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operation.replacement = lines.join("\n");
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if(lines.length === 1) {
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operation.newSelStart = operation.cutStart + operation.replacement.length;
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operation.newSelEnd = operation.newSelStart;
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} else {
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operation.newSelStart = operation.cutStart;
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operation.newSelEnd = operation.newSelStart + operation.replacement.length;
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}
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};
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})();
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