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Code Issues Releases Wiki Activity

WIP: Braincracking with headers...

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This commit is contained in:
Pierre-Henri Lavigne 2024-09-08 01:25:33 +09:00
parent 6af700c333
commit 9f93fc115c
2 changed files with 160 additions and 18 deletions
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2
example/index.html
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@ -15,7 +15,7 @@
<script>
const easyMDE = new EasyMDE({
parsingConfig: {
headingLevels: [ 5, 2, 3, 4, 5 ]
headingLevels: [ 5, 2, 3, 5 ]
}
});
</script>

176
src/js/easymde.js
View File

@ -1825,9 +1825,14 @@ function EasyMDE(options) {
if ( options.parsingConfig.headingLevels ) {
var headingLevels = [];
for ( var l = 0, requestedLevels = options.parsingConfig.headingLevels; l < requestedLevels.length; l++ ) {
if ( ! isNaN( requestedLevels[ l ] ) && headingLevels.indexOf( requestedLevels[ l ] ) === -1 ) {
headingLevels[ l ] = parseInt( requestedLevels[ l ], 10 );
requestedLevels[ l ] = parseInt( requestedLevels[ l ], 10 );
if ( isNaN( requestedLevels[ l ] ) || headingLevels.indexOf( requestedLevels[ l ] ) !== -1 ) {
continue;
}
if ( requestedLevels[ l ] < 1 && requestedLevels[ l ] > 6 ) {
continue;
}
headingLevels[ l ] = requestedLevels[ l ];
}
options.parsingConfig.headingLevels = headingLevels.sort();
}
@ -2199,28 +2204,165 @@ EasyMDE.prototype.render = function (el) {
});
}
if (options.parsingConfig.headingLevels) {
this.codemirror.on('beforeChange', function (cm, obj) {
if (!obj || !obj.from || !obj.to) {
// If the *headingLevels* argument is present, set our custom modifiers
var makeBiggerHeadline = function(headline, from, to) {
headline = headline || '';
if (!from || !to) {
return '';
}
var level = '';
while (from < to) {
level += '#';
from++;
}
level += ' '; console.log(level);
return /#/.test(headline) ? headline.replace(/#\s*/, level) : level;
}
var headlineNeedUpdate = function(myCurrHeadline, allowedHeadlingLevels) {
if (!myCurrHeadline || !allowedHeadlingLevels) {
return false;
}
if (obj.from.line !== obj.to.line) {
if (!/^[#]+/.test(myCurrHeadline.trim())){
return false;
}
if (!obj.from.ch || !obj.to.ch || obj.to.ch > 6) {
return false;
}
if (!obj.text || obj.text.length !== 1 || obj.text[0] !== ' ') {
return false;
}
var myText = cm.getRange({line: obj.from.line, ch: 0}, {line: obj.to.line, ch: obj.to.ch});
if (!/^#+$/.test(myText.trim())){
return false;
}
var allowedHeadlingLevels = cm.options.backdrop.headingLevels,
currHeadlingLevel = (myText.match(/#/g) || []).length;
var currHeadlingLevel = ((myCurrHeadline || '').match(/#/g) || []).length;
if (allowedHeadlingLevels.indexOf(currHeadlingLevel) !== -1) {
return false;
}
var newHeadingLevel = 0, n = 0;
while (n < allowedHeadlingLevels.length) {
if (allowedHeadlingLevels[n] > currHeadlingLevel) {
newHeadingLevel = allowedHeadlingLevels[n];
break;
}
n++;
}
if (!newHeadingLevel) {
n = allowedHeadlingLevels.length - 1;
while (n > -1) {
if (allowedHeadlingLevels[n] < currHeadlingLevel) {
newHeadingLevel = allowedHeadlingLevels[n];
break;
}
n--;
}
}
if (!newHeadingLevel || newHeadingLevel === currHeadlingLevel) {
return false;
}
return {
from: currHeadlingLevel,
to: newHeadingLevel,
};
};
var checkNewHeadline = function(cm, obj) {
var myHeadline = cm.getRange({
line: obj.from.line,
ch: 0,
}, {
line: obj.to.line,
ch: obj.to.ch,
});
var levels = headlineNeedUpdate(myHeadline, cm.options.backdrop.headingLevels);
if (!levels || !levels.from || !levels.to) {
return false;
}
if (obj.from.line === obj.to.line) {
// Most simple case when a modification has occured on a single line
if (levels.to > levels.from) {
// Current level is forbidden so we jump to the closest upper level allowed
// We only need to update the text value before the modification is applied
obj.text[0] = makeBiggerHeadline('', levels.from, levels.to);
}
else {
// The current level is forbidden and we jump to the closest lower level available
// A bit more complicated: we have to cancel the update and trigger a replacement with the existing string
obj.cancel();
var newHeadline = '';
while (levels.to > 0) {
newHeadline += '#';
levels.to--;
}
newHeadline += ' ';
cm.doc.replaceRange(newHeadline, {
line: obj.from.line,
ch: 0,
}, {
line: obj.to.line,
ch: obj.to.ch,
}, myHeadline );
}
}
return true;
};
var checkExistingHeadline = function(cm, obj) {
var myChar = cm.getRange({
line: obj.from.line,
ch: obj.from.ch,
}, {
line: obj.to.line,
ch: obj.to.ch + 1,
});
console.log( '==' + myChar + '==' );
if (!/\s|#/.test(myChar || '')) {
return false;
}
var myText = cm.getRange({line: obj.from.line, ch: 0}, {line: obj.to.line, ch: 8});
console.log( myText );
if ((obj.from.line === obj.to.line) && obj.text.length === 1 && obj.text[0] === '#') {
if (!/[^\s#]/.test(myText)) {
// Newly created, skip the check for now
return false;
}
var levels = headlineNeedUpdate(myText.replace(/#/, '##'), cm.options.backdrop.headingLevels);
if (!levels || !levels.from || !levels.to) {
return false;
}
if (levels.to > levels.from) {
obj.text[0] = '#';
while (levels.from < levels.to) {
obj.text[0] += '#';
levels.from++;
}
return true;
}
}
};
this.codemirror.on('beforeChange', function (cm, obj) {
console.log(obj);
if (!obj || !obj.from || !obj.to || !obj.text) {
// Don't go further 'cause a required argument is missing...
return false;
}
if ((obj.from.line === obj.to.line) && obj.to.ch > 6) {
// No need to trigger a check if we are on the same line at character 7 or upper
// As we are sure the cursor is not inside a markdown header
return false;
}
if (/input/.test(obj.origin || '+input')) { // Something was added
if (!obj.text.length || !obj.text[0].length) {
// Just in case
return false;
}
if (obj.text.length === 1 && obj.text[0].length === 1) {
// Only one character in one line is being updated
if (obj.text[0] === ' ') {
return checkNewHeadline(cm, obj);
}
else if (obj.text[0] === '#') {
return checkExistingHeadline(cm, obj);
}
else {
return false;
}
}
else {
}
}
else if (/delete/.test(obj.origin)) { // Something was removed
return checkExistingHeadline(cm, obj);
}
});
}