tooltip.js

/**
 * The following features are still outstanding: animation as a
 * function, placement as a function, inside, support for more triggers than
 * just mouse enter/leave, html tooltips, and selector delegation.
 */
angular.module( 'ui.bootstrap.tooltip', [ 'ui.bootstrap.position' ] )

/**
 * The $tooltip service creates tooltip- and popover-like directives as well as
 * houses global options for them.
 */
.provider( '$tooltip', function () {
  // The default options tooltip and popover.
  var defaultOptions = {
    placement: 'top',
    animation: true,
    popupDelay: 0
  };

  // Default hide triggers for each show trigger
  var triggerMap = {
    'mouseenter': 'mouseleave',
    'click': 'click',
    'focus': 'blur'
  };

  // The options specified to the provider globally.
  var globalOptions = {};
  
  /**
   * `options({})` allows global configuration of all tooltips in the
   * application.
   *
   *   var app = angular.module( 'App', ['ui.bootstrap.tooltip'], function( $tooltipProvider ) {
   *     // place tooltips left instead of top by default
   *     $tooltipProvider.options( { placement: 'left' } );
   *   });
   */
	this.options = function( value ) {
		angular.extend( globalOptions, value );
	};

  /**
   * This is a helper function for translating camel-case to snake-case.
   */
  function snake_case(name){
    var regexp = /[A-Z]/g;
    var separator = '-';
    return name.replace(regexp, function(letter, pos) {
      return (pos ? separator : '') + letter.toLowerCase();
    });
  }

  /**
   * Returns the actual instance of the $tooltip service.
   * TODO support multiple triggers
   */
  this.$get = [ '$window', '$compile', '$timeout', '$parse', '$document', '$position', '$interpolate', function ( $window, $compile, $timeout, $parse, $document, $position, $interpolate ) {
    return function $tooltip ( type, prefix, defaultTriggerShow ) {
      var options = angular.extend( {}, defaultOptions, globalOptions );

      /**
       * Returns an object of show and hide triggers.
       *
       * If a trigger is supplied,
       * it is used to show the tooltip; otherwise, it will use the `trigger`
       * option passed to the `$tooltipProvider.options` method; else it will
       * default to the trigger supplied to this directive factory.
       *
       * The hide trigger is based on the show trigger. If the `trigger` option
       * was passed to the `$tooltipProvider.options` method, it will use the
       * mapped trigger from `triggerMap` or the passed trigger if the map is
       * undefined; otherwise, it uses the `triggerMap` value of the show
       * trigger; else it will just use the show trigger.
       */
      function setTriggers ( trigger ) {
        var show, hide;
       
        show = trigger || options.trigger || defaultTriggerShow;
        if ( angular.isDefined ( options.trigger ) ) {
          hide = triggerMap[options.trigger] || show;
        } else {
          hide = triggerMap[show] || show;
        }

        return {
          show: show,
          hide: hide
        };
      }

      var directiveName = snake_case( type );
      var triggers = setTriggers( undefined );

      var startSym = $interpolate.startSymbol();
      var endSym = $interpolate.endSymbol();
      var template = 
        '<'+ directiveName +'-popup '+
          'title="'+startSym+'tt_title'+endSym+'" '+
          'content="'+startSym+'tt_content'+endSym+'" '+
          'placement="'+startSym+'tt_placement'+endSym+'" '+
          'animation="tt_animation()" '+
          'is-open="tt_isOpen"'+
          '>'+
        '</'+ directiveName +'-popup>';

      return {
        restrict: 'EA',
        scope: true,
        link: function link ( scope, element, attrs ) {
          var tooltip = $compile( template )( scope );
          var transitionTimeout;
          var popupTimeout;
          var $body;

          // By default, the tooltip is not open.
          // TODO add ability to start tooltip opened
          scope.tt_isOpen = false;

          function toggleTooltipBind () {
            if ( ! scope.tt_isOpen ) {
              showTooltipBind();
            } else {
              hideTooltipBind();
            }
          }
          
          // Show the tooltip with delay if specified, otherwise show it immediately
          function showTooltipBind() {
            if ( scope.tt_popupDelay ) {
              popupTimeout = $timeout( show, scope.tt_popupDelay );
            } else {
              scope.$apply( show );
            }
          }

          function hideTooltipBind () {
            scope.$apply(function () {
              hide();
            });
          }
          
          // Show the tooltip popup element.
          function show() {
            var position,
                ttWidth,
                ttHeight,
                ttPosition;

            // Don't show empty tooltips.
            if ( ! scope.tt_content ) {
              return;
            }

            // If there is a pending remove transition, we must cancel it, lest the
            // tooltip be mysteriously removed.
            if ( transitionTimeout ) {
              $timeout.cancel( transitionTimeout );
            }
            
            // Set the initial positioning.
            tooltip.css({ top: 0, left: 0, display: 'block' });
            
            // Now we add it to the DOM because need some info about it. But it's not 
            // visible yet anyway.
            if ( options.appendToBody ) {
                $body = $body || $document.find( 'body' );
                $body.append( tooltip );
            } else {
              element.after( tooltip );
            }

            // Get the position of the directive element.
            position = options.appendToBody ? $position.offset( element ) : $position.position( element );

            // Get the height and width of the tooltip so we can center it.
            ttWidth = tooltip.prop( 'offsetWidth' );
            ttHeight = tooltip.prop( 'offsetHeight' );
            
            // Calculate the tooltip's top and left coordinates to center it with
            // this directive.
            switch ( scope.tt_placement ) {
              case 'right':
                ttPosition = {
                  top: (position.top + position.height / 2 - ttHeight / 2) + 'px',
                  left: (position.left + position.width) + 'px'
                };
                break;
              case 'bottom':
                ttPosition = {
                  top: (position.top + position.height) + 'px',
                  left: (position.left + position.width / 2 - ttWidth / 2) + 'px'
                };
                break;
              case 'left':
                ttPosition = {
                  top: (position.top + position.height / 2 - ttHeight / 2) + 'px',
                  left: (position.left - ttWidth) + 'px'
                };
                break;
              default:
                ttPosition = {
                  top: (position.top - ttHeight) + 'px',
                  left: (position.left + position.width / 2 - ttWidth / 2) + 'px'
                };
                break;
            }
            
            // Now set the calculated positioning.
            tooltip.css( ttPosition );
              
            // And show the tooltip.
            scope.tt_isOpen = true;
          }
          
          // Hide the tooltip popup element.
          function hide() {
            // First things first: we don't show it anymore.
            scope.tt_isOpen = false;

            //if tooltip is going to be shown after delay, we must cancel this
            $timeout.cancel( popupTimeout );
            
            // And now we remove it from the DOM. However, if we have animation, we 
            // need to wait for it to expire beforehand.
            // FIXME: this is a placeholder for a port of the transitions library.
            if ( angular.isDefined( scope.tt_animation ) && scope.tt_animation() ) {
              transitionTimeout = $timeout( function () { tooltip.remove(); }, 500 );
            } else {
              tooltip.remove();
            }
          }

          /**
           * Observe the relevant attributes.
           */
          attrs.$observe( type, function ( val ) {
            scope.tt_content = val;
          });

          attrs.$observe( prefix+'Title', function ( val ) {
            scope.tt_title = val;
          });

          attrs.$observe( prefix+'Placement', function ( val ) {
            scope.tt_placement = angular.isDefined( val ) ? val : options.placement;
          });

          attrs.$observe( prefix+'Animation', function ( val ) {
            scope.tt_animation = angular.isDefined( val ) ? $parse( val ) : function(){ return options.animation; };
          });

          attrs.$observe( prefix+'PopupDelay', function ( val ) {
            var delay = parseInt( val, 10 );
            scope.tt_popupDelay = ! isNaN(delay) ? delay : options.popupDelay;
          });

          attrs.$observe( prefix+'Trigger', function ( val ) {
            element.unbind( triggers.show );
            element.unbind( triggers.hide );

            triggers = setTriggers( val );

            if ( triggers.show === triggers.hide ) {
              element.bind( triggers.show, toggleTooltipBind );
            } else {
              element.bind( triggers.show, showTooltipBind );
              element.bind( triggers.hide, hideTooltipBind );
            }
          });

          // if a tooltip is attached to <body> we need to remove it on
          // location change as its parent scope will probably not be destroyed
          // by the change.
          if ( options.appendToBody ) {
            scope.$on('$locationChangeSuccess', function closeTooltipOnLocationChangeSuccess () {
            if ( scope.tt_isOpen ) {
              hide();
            }
          });
          }
          
          // if this trigger element is destroyed while the tooltip is open, we
          // need to close the tooltip.
          scope.$on('$destroy', function closeTooltipOnDestroy () {
            if ( scope.tt_isOpen ) {
              hide();
            }
          });
        }
      };
    };
  }];
})

.directive( 'tooltipPopup', function () {
  return {
    restrict: 'E',
    replace: true,
    scope: { content: '@', placement: '@', animation: '&', isOpen: '&' },
    templateUrl: 'template/tooltip/tooltip-popup.html'
  };
})

.directive( 'tooltip', [ '$tooltip', function ( $tooltip ) {
  return $tooltip( 'tooltip', 'tooltip', 'mouseenter' );
}])

.directive( 'tooltipHtmlUnsafePopup', function () {
  return {
    restrict: 'E',
    replace: true,
    scope: { content: '@', placement: '@', animation: '&', isOpen: '&' },
    templateUrl: 'template/tooltip/tooltip-html-unsafe-popup.html'
  };
})

.directive( 'tooltipHtmlUnsafe', [ '$tooltip', function ( $tooltip ) {
  return $tooltip( 'tooltipHtmlUnsafe', 'tooltip', 'mouseenter' );
}]);