extend it further so it's exposed to DAM

getATtriuteOnSelection-extend
John McLear 2016-03-26 10:38:39 +08:00
parent 0e0d040108
commit 1d1354e212
1 changed files with 71 additions and 0 deletions

View File

@ -178,6 +178,77 @@ AttributeManager.prototype = _(AttributeManager.prototype).extend({
}
return [];
},
/*
Gets a given attribute on a selection
@param attributeName
@param prevChar
returns true or false if an attribute is visible in range
*/
getAttributeOnSelection: function(attributeName, prevChar){
var rep = this.rep;
if (!(rep.selStart && rep.selEnd)) return
var withIt = Changeset.makeAttribsString('+', [
[attributeName, 'true']
], rep.apool);
var withItRegex = new RegExp(withIt.replace(/\*/g, '\\*') + "(\\*|$)");
function hasIt(attribs)
{
return withItRegex.test(attribs);
}
return rangeHasAttrib(rep.selStart, rep.selEnd)
function rangeHasAttrib(selStart, selEnd) {
// if range is collapsed -> no attribs in range
if(selStart[1] == selEnd[1] && selStart[0] == selEnd[0]) return false
if(selStart[0] != selEnd[0]) { // -> More than one line selected
var hasAttrib = true
// from selStart to the end of the first line
hasAttrib = hasAttrib && rangeHasAttrib(selStart, [selStart[0], rep.lines.atIndex(selStart[0]).text.length])
// for all lines in between
for(var n=selStart[0]+1; n < selEnd[0]; n++) {
hasAttrib = hasAttrib && rangeHasAttrib([n, 0], [n, rep.lines.atIndex(n).text.length])
}
// for the last, potentially partial, line
hasAttrib = hasAttrib && rangeHasAttrib([selEnd[0], 0], [selEnd[0], selEnd[1]])
return hasAttrib
}
// Logic tells us we now have a range on a single line
var lineNum = selStart[0]
, start = selStart[1]
, end = selEnd[1]
, hasAttrib = true
// Iterate over attribs on this line
var opIter = Changeset.opIterator(rep.alines[lineNum])
, indexIntoLine = 0
while (opIter.hasNext()) {
var op = opIter.next();
var opStartInLine = indexIntoLine;
var opEndInLine = opStartInLine + op.chars;
if (!hasIt(op.attribs)) {
// does op overlap selection?
if (!(opEndInLine <= start || opStartInLine >= end)) {
hasAttrib = false; // since it's overlapping but hasn't got the attrib -> range hasn't got it
break;
}
}
indexIntoLine = opEndInLine;
}
return hasAttrib
}
},
/*
Gets all attributes at a position containing line number and column