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/*
This file is part of rhizi, a collaborative knowledge graph editor.
Copyright (C) 2014-2015 Rhizi
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
define(['jquery', 'Bacon', 'consts', 'model/diff', 'rz_bus', 'consts'],
function($, Bacon, consts, model_diff, rz_bus, consts)
{
var svg_input_fo_node_y = '-.70em',
svg_input_fo_height = '30px';
/**
* svgInput - creates an embedded input element in an svg node.
*
* edit_node(@sibling, @node)
* edit_link(@sibling, @link)
*/
var svgInput = function(vis, graph) {
var original_element,
is_link,
graphEditBus = new Bacon.Bus(),
currentIdBus = new Bacon.Bus(),
current_id = currentIdBus.toProperty(null);
graph.diffBus
.filter(model_diff.is_attr_diff)
.combine(current_id, function(diff, id) { return [diff, id]; })
.filter(function (val) {
var diff = val[0],
id = val[1];
return (is_link && diff.has_link_id_attr_write(id, 'name')) ||
(!is_link && diff.has_node_id_attr_write(id, 'name'));
})
.map(function (val) { return graph.find_node__by_id(val[1]).name; })
.onValue(function (name) {
var svg_input = createOrGetSvgInput();
svg_input.text(name);
});
function appendForeignElementInputWithID(base, elemid, width, height)
{
var textnode = document.createTextNode(''),
div = document.createElement('div'),
fo = document.createElementNS('http://www.w3.org/2000/svg', 'foreignObject');
div.setAttribute('contentEditable', 'true');
div.setAttribute('width', 'auto');
div.appendChild(textnode);
div.style.pointerEvents = 'all';
div.classList.add('insideforeign');
div.setAttribute('id', elemid);
fo.setAttribute('width', '100%');
fo.setAttribute('height', '100%');
fo.style.pointerEvents = 'none';
fo.classList.add('foreign');
fo.appendChild(div);
base.appendChild(fo);
return div;
}
function onkeydown(e) {
var ret = undefined,
jelement = createOrGetSvgInput(),
element = jelement[0],
newname = jelement.text(),
fo = createOrGetSvgInputFO(),
d;
if (element != this) {
console.log('unexpected editname_on_keypress this should be the svg-input element');
}
if (e.which == consts.VK_ENTER || e.which == consts.VK_ESCAPE) {
ret = false;
d = jelement.data().d;
if (e.which == consts.VK_ENTER && newname != d.name) {
if (d.hasOwnProperty('__src')) {
graph.update_link(d, {name: newname});
} else {
// TODO - display hourglass
// TODO - use promises to make A follows B readable.
graph.update_node(d, {name: newname});
}
}
hide();
}
rz_bus.ui_key.push({where: consts.KEYSTROKE_WHERE_EDIT_NODE, keys: [e.which]});
return ret;
};
// FIXME: element being deleted. Some delete is legit - removal of related element. Some isn't (a click).
// Instead of investigating (time constraint) reparenting as sibling, and introducing
// this function. Cost of creation of element is negligble, it's just ugly..
function createOrGetSvgInput()
{
var svg_input_name = 'svg-input',
svg_input_selector = '#' + svg_input_name,
svg_input = $(svg_input_selector);
if (svg_input.length == 0) {
console.log('creating new svg-input');
svg_input = $(appendForeignElementInputWithID(vis[0][0], svg_input_name));
svg_input.on('keydown', onkeydown);
}
return svg_input;
}
function createOrGetSvgInputFO()
{
return createOrGetSvgInput().parent();
}
/*
* Makes the input element visible at the position of @e with text
* from @n. Uses @x as x offset.
*
* @param e visual node element
* @param n node model object
* @param x offset on x dimension from e
*/
function enable(e, n, x) {
var oldname = n.name,
svg_input = createOrGetSvgInput(),
fo = createOrGetSvgInputFO();
is_link = n.hasOwnProperty('__src');
currentIdBus.push(n.id);
e.parentNode.appendChild(fo[0]); // This will unparent from the old parent
if (is_link) {
fo.attr('transform', e.getAttribute('transform'));
// XXX links set the text-anchor middle attribute. no idea how to do that
fo.attr('x', -$(e).width() / 2);
fo.attr('y', -$(e).height() / 2 - 3); // XXX This minus 3 is only kinda ok.
fo.attr('class', 'svg-input-fo-link');
} else {
fo.attr('x', x);
fo.attr('y', svg_input_fo_node_y);
fo.attr('transform', null);
fo.attr('class', 'svg-input-fo-node');
}
// Set width correctly
fo.show();
svg_input.text(oldname);
svg_input.data().d = n;
svg_input.focus();
if (original_element) {
original_element.show();
}
original_element = $(e);
original_element.hide();
// TODO: set cursor to correct location in text
}
function hide() {
createOrGetSvgInputFO().hide();
if (original_element && original_element.show) {
original_element.show();
}
}
// on change to graph.node[id] update val
// on change to graph.link[id] update val
// on delete of id hide
return {
enable: enable,
hide: hide,
};
};
return svgInput;
});
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