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/*****************************************************************************
*
* ElementLabel.js - This class realizes the object labels
*
* Copyright (c) 2004-2016 NagVis Project (Contact: info@nagvis.org)
*
* License:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*****************************************************************************/
var ElementLabel = Element.extend({
label_text: null,
update: function() {
this.label_text = this.obj.conf.label_text || '';
// Replace configuration based macros in label_text when needed
if (this.label_text && this.label_text !== '') {
var objName;
// For maps use the alias as display string
if (this.obj.conf.type == 'map') {
objName = this.obj.conf.alias;
} else {
objName = this.obj.conf.name;
}
this.label_text = this.label_text.replace(getRegEx('name', '\\[name\\]', 'g'), objName);
this.label_text = this.label_text.replace(getRegEx('alias', '\\[alias\\]', 'g'), this.obj.conf.alias);
if (this.obj.conf.type == 'service') {
this.label_text = this.label_text.replace(getRegEx('service_description', '\\[service_description\\]', 'g'), this.obj.conf.service_description);
}
}
},
updateAttrs: function(only_state) {
// update the label on every state update where at least the output or perfdata changed
if (!only_state || (!this.obj.stateChanged() && this.obj.outputOrPerfdataChanged())) {
this.erase();
this.render();
this.draw();
// The x/y coords set above are only temporary coordinates. The right ones are
// later set by the place() executed in:
// a) onload of icon images
// b) at end of lines render() methods
//
// Normally the following call of this.place() should not be neccessary but there seem
// to be cases where the onload handler function of icons does not fire and
// icons won't be moved to their expected position. To workaround this, we call
// this.place() here which won't get the exact coordinates (in case of relative
// coordinates to the icon like bottom/center).
this.place();
}
},
render: function() {
this.dom_obj = renderNagVisTextbox(
this.obj.conf.object_id + '-label',
this.obj.conf.label_background, this.obj.conf.label_border,
0, 0,
this.obj.conf.z,
this.obj.conf.label_width, '', this.getText(),
this.obj.conf.label_style
);
},
unlock: function () {
addEvent(this.dom_obj, 'mouseover', function() {
document.body.style.cursor = 'move';
});
addEvent(this.dom_obj, 'mouseout', function() {
document.body.style.cursor = 'auto';
});
makeDragable(this.dom_obj, this.obj, this.saveLabel, this.dragLabel);
},
lock: function () {
this.dom_obj.onmouseover = null;
this.dom_obj.onmouseout = null;
makeUndragable(this.dom_obj);
},
/**
* Calculates and applies the real positions of the objects label. It uses the configuration
* variables label_x/label_y and repositions the labels based on the config. The label
* must have been rendered and added to dom to have the dimensions of the object to be able
* to realize the center/bottom coordinate definitions.
*/
place: function () {
this.dom_obj.style.left = this.parseLabelCoord('x') + 'px';
this.dom_obj.style.top = this.parseLabelCoord('y') + 'px';
},
//
// END OF PUBLIC METHODS
//
// Returns the label with even state based macros replaced
getText: function () {
var text = this.label_text;
// Replace static macros in label_text when needed
if (text && text !== '') {
text = text.replace(getRegEx('output', '\\[output\\]', 'g'), this.obj.conf.output);
if (this.obj.conf.type == 'service' || this.obj.conf.type == 'host') {
text = text.replace(getRegEx('perfdata', '\\[perfdata\\]', 'g'), this.obj.conf.perfdata);
}
}
if (this.obj.conf.label_maxlen > 0 && text.length > this.obj.conf.label_maxlen)
text = text.substr(0, this.obj.conf.label_maxlen - 2) + '...';
return text;
},
/**
* This needs to calculate the offset of the current position to the first position,
* then create a new coord (relative/absolue) and save them in label_x/y attributes
*/
// Important: It is called from an event handler the 'this.' keyword can not be used here.
dragLabel: function(trigger_obj, obj, event) {
var isRelative = function(coord) {
return coord.toString().match(/^(?:\+|\-|center|bottom)/);
};
// Calculates relative/absolute coords depending on the current configured type
var calcNewLabelCoord = function (labelCoord, coord, newCoord) {
if (isRelative(labelCoord)) {
var ret = newCoord - coord;
if(ret >= 0)
return '+' + ret;
return ret;
} else
return newCoord;
};
obj.conf.label_x = calcNewLabelCoord(obj.conf.label_x,
obj.parseCoord(obj.conf.x, 'x', false), trigger_obj.x);
obj.conf.label_y = calcNewLabelCoord(obj.conf.label_y,
obj.parseCoord(obj.conf.y, 'y', false), trigger_obj.y);
if (isRelative(obj.conf.label_x) || isRelative(obj.conf.label_y))
obj.highlight(true);
},
// Important: It is called from an event handler the 'this.' keyword can not be used here.
saveLabel: function(trigger_obj, obj, oParent) {
saveObjectAttr(obj.conf.object_id, {
'label_x': obj.conf.label_x,
'label_y': obj.conf.label_y
});
obj.highlight(false);
},
parseLabelCoord: function (dir) {
if (dir === 'x') {
var coord = this.obj.conf.label_x;
if (this.obj.conf.view_type && this.obj.conf.view_type == 'line') {
var obj_coord = this.obj.getLineMid(this.obj.conf.x, 'x');
} else {
var obj_coord = addZoomFactor(this.obj.parseCoords(this.obj.conf.x, 'x', false)[0], true);
}
} else {
var coord = this.obj.conf.label_y;
if (this.obj.conf.view_type && this.obj.conf.view_type == 'line') {
var obj_coord = this.obj.getLineMid(this.obj.conf.y, 'y');
} else {
var obj_coord = addZoomFactor(this.obj.parseCoords(this.obj.conf.y, 'y', false)[0], true);
}
}
if (dir == 'x' && coord && coord.toString() == 'center') {
var diff = parseInt(parseInt(this.dom_obj.clientWidth) - rmZoomFactor(this.obj.getObjWidth())) / 2;
coord = obj_coord - diff;
} else if (dir == 'y' && coord && coord.toString() == 'bottom') {
coord = obj_coord + rmZoomFactor(this.obj.getObjHeight());
} else if (coord && coord.toString().match(/^(?:\+|\-)/)) {
// If there is a presign it should be relative to the objects x/y
coord = obj_coord + addZoomFactor(parseFloat(coord));
} else if (!coord || coord === '0') {
// If no x/y coords set, fallback to object x/y
coord = obj_coord;
} else {
// This must be absolute coordinates, apply zoom factor
coord = addZoomFactor(coord, true);
}
return coord;
}
});
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