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/* eslint-disable import/prefer-default-export, func-names, space-before-function-paren, wrap-iife, no-var, no-param-reassign, no-cond-assign, quotes, one-var, one-var-declaration-per-line, operator-assignment, no-else-return, prefer-template, prefer-arrow-callback, no-empty, max-len, consistent-return, no-unused-vars, no-return-assign, max-len, vars-on-top */
const textUtils = {};
textUtils.selectedText = function(text, textarea) {
return text.substring(textarea.selectionStart, textarea.selectionEnd);
};
textUtils.lineBefore = function(text, textarea) {
var split;
split = text.substring(0, textarea.selectionStart).trim().split('\n');
return split[split.length - 1];
};
textUtils.lineAfter = function(text, textarea) {
return text.substring(textarea.selectionEnd).trim().split('\n')[0];
};
textUtils.blockTagText = function(text, textArea, blockTag, selected) {
var lineAfter, lineBefore;
lineBefore = this.lineBefore(text, textArea);
lineAfter = this.lineAfter(text, textArea);
if (lineBefore === blockTag && lineAfter === blockTag) {
// To remove the block tag we have to select the line before & after
if (blockTag != null) {
textArea.selectionStart = textArea.selectionStart - (blockTag.length + 1);
textArea.selectionEnd = textArea.selectionEnd + (blockTag.length + 1);
}
return selected;
} else {
return blockTag + "\n" + selected + "\n" + blockTag;
}
};
textUtils.insertText = function(textArea, text, tag, blockTag, selected, wrap) {
var insertText, inserted, selectedSplit, startChar, removedLastNewLine, removedFirstNewLine, currentLineEmpty, lastNewLine;
removedLastNewLine = false;
removedFirstNewLine = false;
currentLineEmpty = false;
// Remove the first newline
if (selected.indexOf('\n') === 0) {
removedFirstNewLine = true;
selected = selected.replace(/\n+/, '');
}
// Remove the last newline
if (textArea.selectionEnd - textArea.selectionStart > selected.replace(/\n$/, '').length) {
removedLastNewLine = true;
selected = selected.replace(/\n$/, '');
}
selectedSplit = selected.split('\n');
if (!wrap) {
lastNewLine = textArea.value.substr(0, textArea.selectionStart).lastIndexOf('\n');
// Check whether the current line is empty or consists only of spaces(=handle as empty)
if (/^\s*$/.test(textArea.value.substring(lastNewLine, textArea.selectionStart))) {
currentLineEmpty = true;
}
}
startChar = !wrap && !currentLineEmpty && textArea.selectionStart > 0 ? '\n' : '';
if (selectedSplit.length > 1 && (!wrap || (blockTag != null && blockTag !== ''))) {
if (blockTag != null && blockTag !== '') {
insertText = this.blockTagText(text, textArea, blockTag, selected);
} else {
insertText = selectedSplit.map(function(val) {
if (val.indexOf(tag) === 0) {
return "" + (val.replace(tag, ''));
} else {
return "" + tag + val;
}
}).join('\n');
}
} else {
insertText = "" + startChar + tag + selected + (wrap ? tag : ' ');
}
if (removedFirstNewLine) {
insertText = '\n' + insertText;
}
if (removedLastNewLine) {
insertText += '\n';
}
if (document.queryCommandSupported('insertText')) {
inserted = document.execCommand('insertText', false, insertText);
}
if (!inserted) {
try {
document.execCommand("ms-beginUndoUnit");
} catch (error) {}
textArea.value = this.replaceRange(text, textArea.selectionStart, textArea.selectionEnd, insertText);
try {
document.execCommand("ms-endUndoUnit");
} catch (error) {}
}
return this.moveCursor(textArea, tag, wrap, removedLastNewLine);
};
textUtils.moveCursor = function(textArea, tag, wrapped, removedLastNewLine) {
var pos;
if (!textArea.setSelectionRange) {
return;
}
if (textArea.selectionStart === textArea.selectionEnd) {
if (wrapped) {
pos = textArea.selectionStart - tag.length;
} else {
pos = textArea.selectionStart;
}
if (removedLastNewLine) {
pos -= 1;
}
return textArea.setSelectionRange(pos, pos);
}
};
textUtils.updateText = function(textArea, tag, blockTag, wrap) {
var $textArea, selected, text;
$textArea = $(textArea);
textArea = $textArea.get(0);
text = $textArea.val();
selected = this.selectedText(text, textArea);
$textArea.focus();
return this.insertText(textArea, text, tag, blockTag, selected, wrap);
};
textUtils.init = function(form) {
var self;
self = this;
return $('.js-md', form).off('click').on('click', function() {
var $this;
$this = $(this);
return self.updateText($this.closest('.md-area').find('textarea'), $this.data('mdTag'), $this.data('mdBlock'), !$this.data('mdPrepend'));
});
};
textUtils.removeListeners = function(form) {
return $('.js-md', form).off('click');
};
textUtils.replaceRange = function(s, start, end, substitute) {
return s.substring(0, start) + substitute + s.substring(end);
};
export default textUtils;
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