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define(['jquery', 'Bacon_wrapper', 'util', 'view/completer', 'rz_bus', 'textanalysis', 'consts'],
function($, Bacon, util, completer, rz_bus, textanalysis, consts)
{
// Aliases
var value = util.value;
// Constants
var nbsp = String.fromCharCode(160);
function textanalyser_input(spec) {
var element_name = spec.element_name,
ta = {
spec: spec,
on_analysis: new Bacon.Bus(),
on_resize: new Bacon.Bus(),
element: $(element_name),
},
element = ta.element,
element_raw = element[0],
initial_width = element.width(),
analysisCompleter = completer(element, $(spec.completer_name), {hideOnTab: false}),
document_keydown = new Bacon.Bus(),
input_bus = new Bacon.Bus();
analysisCompleter.options.plug(textanalysis.suggestions_options);
util.assert(1 === element.length);
var selectionStart = function () {
return util.selectionStart(element_raw);
}
ta.selectionStart = selectionStart;
function key(val) {
return function (e) {
return e.keyCode == val;
};
};
function current_value() {
return nbsp_to_spaces(value(element_raw));
}
ta.value = current_value;
function nbsp_to_spaces(str) {
return str.replace(new RegExp(nbsp, 'g'), ' ');
}
function stretch_input_to_text_size(text)
{
var new_width = Math.min(Math.max(initial_width, text.length * 9 + 20), $(window).width() * 0.8);
element.width(new_width);
ta.on_resize.push();
}
function update_element(current_text)
{
var parts,
base_parts,
selection_start;
selection_start = selectionStart();
value(element_raw, ''); // this removes span elements as well
// here we stop treating the element as an input, this only works on a div/other "normal" element
base_parts = current_text.split(/ /)
parts = base_parts.slice(0, base_parts.length - 1).map(function (l) { return l + ' '; });
if (base_parts[base_parts.length - 1].length != 0) {
parts.push(base_parts[base_parts.length - 1]);
}
function span(text, color) {
return $('<span style="color: ' + color + '">' + text.replace(/ /g, nbsp) + '</span>');
}
parts.map(function (part, index) {
element.append(span(part, index % 2 == 0 ? 'blue' : 'red'));
});
util.setSelection(element_raw, selection_start, selection_start);
stretch_input_to_text_size(current_text);
return current_text;
}
var enters = element.asEventStream('keydown').filter(key(13))
.map(function (e) {
var text;
if (!analysisCompleter.handleEnter()) {
text = current_value();
value(element_raw, "");
return text;
} else {
return false;
}
});
rz_bus.ui_key.plug(document_keydown);
ta.on_sentence = enters.filter(function (v) { return v !== false; });
ta.on_analysis.plug(enters.filter(function (v) { return v === false; }).map(current_value));
ta.on_tab = element.asEventStream('keydown').filter(key(9));
element.asEventStream('keydown').onValue(function (e) {
document_keydown.push({where: consts.KEYSTROKE_WHERE_TEXTANALYSIS, keys: [e.keyCode]});
});
element.asEventStream('input selectionchange click').onValue(function (e) {
analysisCompleter.oninput(current_value(), selectionStart(element_raw));
e.stopPropagation();
e.preventDefault();
});
ta.on_analysis.plug(element.asEventStream('input').map(current_value).map(update_element));
return ta;
};
return textanalyser_input;
}
);
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