Merge pull request #2940 from ether/extend-getAttributesOnSelection

extend attributesonselection method
This commit is contained in:
John McLear 2016-04-05 22:30:15 +01:00
commit 282b1cdcfe
3 changed files with 102 additions and 4 deletions

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@ -37,13 +37,19 @@ Returns the `rep` object.
## editorInfo.ace_isCaret(?)
## editorInfo.ace_getLineAndCharForPoint(?)
## editorInfo.ace_performDocumentApplyAttributesToCharRange(?)
## editorInfo.ace_setAttributeOnSelection(?)
## editorInfo.ace_setAttributeOnSelection(attribute, enabled)
Sets an attribute on current range.
Example: `call.editorInfo.ace_setAttributeOnSelection("turkey::balls", true); // turkey is the attribute here, balls is the value
Notes: to remove the attribute pass enabled as false
## editorInfo.ace_toggleAttributeOnSelection(?)
## editorInfo.ace_getAttributeOnSelection(attribute)
## editorInfo.ace_getAttributeOnSelection(attribute, prevChar)
Returns a boolean if an attribute exists on a selected range.
prevChar value should be true if you want to get the previous Character attribute instead of the current selection for example
if the caret is at position 0,1 (after first character) it's probable you want the attributes on the character at 0,0
The attribute should be the string name of the attribute applied to the selection IE subscript
Example usage: Apply the activeButton Class to a button if an attribute is on a highlighted/selected caret position or range.
Example: `call.editorInfo.ace_getAttributeOnSelection("subscript");` // call here is the callstack from aceEditEvent.
Example `var isItThere = documentAttributeManager.getAttributeOnSelection("turkey::balls", true);`
See the ep_subscript plugin for an example of this function in action.
Notes: Does not work on first or last character of a line. Suffers from a race condition if called with aceEditEvent.
## editorInfo.ace_performSelectionChange(?)

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@ -179,6 +179,89 @@ 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
// If we're looking for the caret attribute not the selection
// has the user already got a selection or is this purely a caret location?
var isNotSelection = (rep.selStart[0] == rep.selEnd[0] && rep.selEnd[1] === rep.selStart[1]);
if(isNotSelection){
if(prevChar){
// If it's not the start of the line
if(rep.selStart[1] !== 0){
rep.selStart[1]--;
}
}
}
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
@param lineNumber starting with zero

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@ -2338,8 +2338,17 @@ function Ace2Inner(){
editorInfo.ace_setAttributeOnSelection = setAttributeOnSelection;
function getAttributeOnSelection(attributeName){
function getAttributeOnSelection(attributeName, prevChar){
if (!(rep.selStart && rep.selEnd)) return
var isNotSelection = (rep.selStart[0] == rep.selEnd[0] && rep.selEnd[1] === rep.selStart[1]);
if(isNotSelection){
if(prevChar){
// If it's not the start of the line
if(rep.selStart[1] !== 0){
rep.selStart[1]--;
}
}
}
var withIt = Changeset.makeAttribsString('+', [
[attributeName, 'true']