/*
* Walk throught the children tokens tree, and execute function
* for each token with a text range relative to the base token
*
* It stops at block tokens
*
* @param {Token} base
* @param {Function(token, range)} iter: function to call for each range of text
* @return {String}
*/
function walk(base, iter) {
var offset = 0;
var tokens = base.getTokens();
if (tokens.size === 0) {
iter(base, Range(0, base.getText().length));
return base.getText();
}
return tokens.reduce(function(output, token) {
if (token.isBlock()) {
return output;
}
var innerText = walk(token, function(tok, range) {
var realRange = Range.moveBy(range, offset);
iter(tok, realRange);
});
iter(
token,
Range(offset, innerText.length)
);
offset += innerText.length;
return (output + innerText);
}, '');
}
return tokens.reduce(function(output, token) {
if (token.isBlock()) {
return output;
}
var innerText = walk(token, function(tok, range) {
var realRange = Range.moveBy(range, offset);
iter(tok, realRange);
});
iter(
token,
Range(offset, innerText.length)
);
offset += innerText.length;
return (output + innerText);
}, '');