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popcorn.googlemap.js
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popcorn.googlemap.js
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// PLUGIN: Google Maps
var googleCallback;
(function ( Popcorn ) {
var i = 1,
_mapFired = false,
_mapLoaded = false,
geocoder, loadMaps;
//google api callback
googleCallback = function ( data ) {
// ensure all of the maps functions needed are loaded
// before setting _maploaded to true
if ( typeof google !== "undefined" && google.maps && google.maps.Geocoder && google.maps.LatLng ) {
geocoder = new google.maps.Geocoder();
_mapLoaded = true;
} else {
setTimeout(function () {
googleCallback( data );
}, 1);
}
};
// function that loads the google api
loadMaps = function () {
// for some reason the Google Map API adds content to the body
if ( document.body ) {
_mapFired = true;
Popcorn.getScript( "//maps.google.com/maps/api/js?sensor=false&callback=googleCallback" );
} else {
setTimeout(function () {
loadMaps();
}, 1);
}
};
/**
* googlemap popcorn plug-in
* Adds a map to the target div centered on the location specified by the user
* Options parameter will need a start, end, target, type, zoom, lat and lng, and location
* -Start is the time that you want this plug-in to execute
* -End is the time that you want this plug-in to stop executing
* -Target is the id of the DOM element that you want the map to appear in. This element must be in the DOM
* -Type [optional] either: HYBRID (default), ROADMAP, SATELLITE, TERRAIN, STREETVIEW
* -Zoom [optional] defaults to 0
* -Heading [optional] STREETVIEW orientation of camera in degrees relative to true north (0 north, 90 true east, ect)
* -Pitch [optional] STREETVIEW vertical orientation of the camera (between 1 and 3 is recommended)
* -Lat and Lng: the coordinates of the map must be present if location is not specified.
* -Location: the adress you want the map to display, must be present if lat and lng are not specified.
* Note: using location requires extra loading time, also not specifying both lat/lng and location will
* cause and error.
*
* Tweening works using the following specifications:
* -location is the start point when using an auto generated route
* -tween when used in this context is a string which specifies the end location for your route
* Note that both location and tween must be present when using an auto generated route, or the map will not tween
* -interval is the speed in which the tween will be executed, a reasonable time is 1000 ( time in milliseconds )
* Heading, Zoom, and Pitch streetview values are also used in tweening with the autogenerated route
*
* -tween is an array of objects, each containing data for one frame of a tween
* -position is an object with has two paramaters, lat and lng, both which are mandatory for a tween to work
* -pov is an object which houses heading, pitch, and zoom paramters, which are all optional, if undefined, these values default to 0
* -interval is the speed in which the tween will be executed, a reasonable time is 1000 ( time in milliseconds )
*
* @param {Object} options
*
* Example:
var p = Popcorn("#video")
.googlemap({
start: 5, // seconds
end: 15, // seconds
type: "ROADMAP",
target: "map",
lat: 43.665429,
lng: -79.403323
} )
*
*/
Popcorn.plugin( "googlemap", function ( options ) {
var newdiv, map, location,
target = document.getElementById( options.target );
// if this is the firest time running the plugins
// call the function that gets the sctipt
if ( !_mapFired ) {
loadMaps();
}
// create a new div this way anything in the target div is left intact
// this is later passed on to the maps api
newdiv = document.createElement( "div" );
newdiv.id = "actualmap" + i;
newdiv.style.width = "100%";
newdiv.style.height = "100%";
i++;
// ensure the target container the user chose exists
if ( !target && Popcorn.plugin.debug ) {
throw new Error( "target container doesn't exist" );
}
target && target.appendChild( newdiv );
// ensure that google maps and its functions are loaded
// before setting up the map parameters
var isMapReady = function () {
if ( _mapLoaded ) {
if ( options.location ) {
// calls an anonymous google function called on separate thread
geocoder.geocode({
"address": options.location
}, function ( results, status ) {
if ( status === google.maps.GeocoderStatus.OK ) {
options.lat = results[ 0 ].geometry.location.lat();
options.lng = results[ 0 ].geometry.location.lng();
location = new google.maps.LatLng( options.lat, options.lng );
map = new google.maps.Map( newdiv, {
mapTypeId: google.maps.MapTypeId[ options.type ] || google.maps.MapTypeId.HYBRID
});
map.getDiv().style.display = "none";
}
});
} else {
location = new google.maps.LatLng( options.lat, options.lng );
map = new google.maps.Map( newdiv, {
mapTypeId: google.maps.MapTypeId[ options.type ] || google.maps.MapTypeId.HYBRID
});
map.getDiv().style.display = "none";
}
} else {
setTimeout(function () {
isMapReady();
}, 5);
}
};
isMapReady();
return {
/**
* @member webpage
* The start function will be executed when the currentTime
* of the video reaches the start time provided by the
* options variable
*/
start: function( event, options ) {
var that = this,
sView;
// ensure the map has been initialized in the setup function above
var isMapSetup = function() {
if ( map ) {
map.getDiv().style.display = "block";
// reset the location and zoom just in case the user plaid with the map
google.maps.event.trigger( map, "resize" );
map.setCenter( location );
// make sure options.zoom is a number
if ( options.zoom && typeof options.zoom !== "number" ) {
options.zoom = +options.zoom;
}
options.zoom = options.zoom || 8; // default to 8
map.setZoom( options.zoom );
//Make sure heading is a number
if ( options.heading && typeof options.heading !== "number" ) {
options.heading = +options.heading;
}
//Make sure pitch is a number
if ( options.pitch && typeof options.pitch !== "number" ) {
options.pitch = +options.pitch;
}
if ( options.type === "STREETVIEW" ) {
// Switch this map into streeview mode
map.setStreetView(
// Pass a new StreetViewPanorama instance into our map
sView = new google.maps.StreetViewPanorama( newdiv, {
position: location,
pov: {
heading: options.heading = options.heading || 0,
pitch: options.pitch = options.pitch || 0,
zoom: options.zoom
}
})
);
// Function to handle tweening using a set timeout
var tween = function( rM, t ) {
var computeHeading = google.maps.geometry.spherical.computeHeading;
setTimeout(function() {
var current_time = that.media.currentTime;
// Checks whether this is a generated route or not
if ( typeof options.tween === "object" ) {
for ( var i = 0, m = rM.length; i < m; i++ ) {
var waypoint = rM[ i ];
// Checks if this position along the tween should be displayed or not
if ( current_time >= ( waypoint.interval * ( i + 1 ) ) / 1000 &&
( current_time <= ( waypoint.interval * ( i + 2 ) ) / 1000 ||
current_time >= waypoint.interval * ( m ) / 1000 ) ) {
sView3.setPosition( new google.maps.LatLng( waypoint.position.lat, waypoint.position.lng ) );
sView3.setPov({
heading: waypoint.pov.heading || computeHeading( waypoint, rM[ i + 1 ] ) || 0,
zoom: waypoint.pov.zoom || 0,
pitch: waypoint.pov.pitch || 0
});
}
}
// Calls the tween function again at the interval set by the user
tween( rM, rM[ 0 ].interval );
} else {
for ( var k = 0, l = rM.length; k < l; k++ ) {
var interval = options.interval;
if( current_time >= (interval * ( k + 1 ) ) / 1000 &&
( current_time <= (interval * ( k + 2 ) ) / 1000 ||
current_time >= interval * ( l ) / 1000 ) ) {
sView2.setPov({
heading: computeHeading( rM[ k ], rM[ k + 1 ] ) || 0,
zoom: options.zoom,
pitch: options.pitch || 0
});
sView2.setPosition( checkpoints[ k ] );
}
}
tween( checkpoints, options.interval );
}
}, t );
};
// Determines if we should use hardcoded values ( using options.tween ),
// or if we should use a start and end location and let google generate
// the route for us
if ( options.location && typeof options.tween === "string" ) {
// Creating another variable to hold the streetview map for tweening,
// Doing this because if there was more then one streetview map, the tweening would sometimes appear in other maps
var sView2 = sView;
// Create an array to store all the lat/lang values along our route
var checkpoints = [];
// Creates a new direction service, later used to create a route
var directionsService = new google.maps.DirectionsService();
// Creates a new direction renderer using the current map
// This enables us to access all of the route data that is returned to us
var directionsDisplay = new google.maps.DirectionsRenderer( sView2 );
var request = {
origin: options.location,
destination: options.tween,
travelMode: google.maps.TravelMode.DRIVING
};
// Create the route using the direction service and renderer
directionsService.route( request, function( response, status ) {
if ( status == google.maps.DirectionsStatus.OK ) {
directionsDisplay.setDirections( response );
showSteps( response, that );
}
});
var showSteps = function ( directionResult, that ) {
// Push new google map lat and lng values into an array from our list of lat and lng values
var routes = directionResult.routes[ 0 ].overview_path;
for ( var j = 0, k = routes.length; j < k; j++ ) {
checkpoints.push( new google.maps.LatLng( routes[ j ].lat(), routes[ j ].lng() ) );
}
// Check to make sure the interval exists, if not, set to a default of 1000
options.interval = options.interval || 1000;
tween( checkpoints, 10 );
};
} else if ( typeof options.tween === "object" ) {
// Same as the above to stop streetview maps from overflowing into one another
var sView3 = sView;
for ( var i = 0, l = options.tween.length; i < l; i++ ) {
// Make sure interval exists, if not, set to 1000
options.tween[ i ].interval = options.tween[ i ].interval || 1000;
tween( options.tween, 10 );
}
}
}
} else {
setTimeout(function () {
isMapSetup();
}, 13);
}
};
isMapSetup();
},
/**
* @member webpage
* The end function will be executed when the currentTime
* of the video reaches the end time provided by the
* options variable
*/
end: function ( event, options ) {
// if the map exists hide it do not delete the map just in
// case the user seeks back to time b/w start and end
if ( map ) {
map.getDiv().style.display = "none";
}
},
_teardown: function ( options ) {
var target = document.getElementById( options.target );
// the map must be manually removed
target && target.removeChild( newdiv );
newdiv = map = location = null;
}
};
}, {
about: {
name: "Popcorn Google Map Plugin",
version: "0.1",
author: "@annasob",
website: "annasob.wordpress.com"
},
options: {
start: {
elem: "input",
type: "text",
label: "In"
},
end: {
elem: "input",
type: "text",
label: "Out"
},
target: "map-container",
type: {
elem: "select",
options: [ "ROADMAP", "SATELLITE", "STREETVIEW", "HYBRID", "TERRAIN" ],
label: "Type"
},
zoom: {
elem: "input",
type: "text",
label: "Zoom"
},
lat: {
elem: "input",
type: "text",
label: "Lat"
},
lng: {
elem: "input",
type: "text",
label: "Lng"
},
location: {
elem: "input",
type: "text",
label: "Location"
},
heading: {
elem: "input",
type: "text",
label: "Heading"
},
pitch: {
elem: "input",
type: "text",
label: "Pitch"
}
}
});
})( Popcorn );