modal.js

angular.module('ui.bootstrap.modal', [])

/**
 * A helper, internal data structure that acts as a map but also allows getting / removing
 * elements in the LIFO order
 */
  .factory('$$stackedMap', function () {
    return {
      createNew: function () {
        var stack = [];

        return {
          add: function (key, value) {
            stack.push({
              key: key,
              value: value
            });
          },
          get: function (key) {
            for (var i = 0; i < stack.length; i++) {
              if (key == stack[i].key) {
                return stack[i];
              }
            }
          },
          keys: function() {
            var keys = [];
            for (var i = 0; i < stack.length; i++) {
              keys.push(stack[i].key);
            }
            return keys;
          },
          top: function () {
            return stack[stack.length - 1];
          },
          remove: function (key) {
            var idx = -1;
            for (var i = 0; i < stack.length; i++) {
              if (key == stack[i].key) {
                idx = i;
                break;
              }
            }
            return stack.splice(idx, 1)[0];
          },
          removeTop: function () {
            return stack.splice(stack.length - 1, 1)[0];
          },
          length: function () {
            return stack.length;
          }
        };
      }
    };
  })

/**
 * A helper directive for the $modal service. It creates a backdrop element.
 */
  .directive('modalBackdrop', ['$timeout', function ($timeout) {
    return {
      restrict: 'EA',
      replace: true,
      templateUrl: 'template/modal/backdrop.html',
      compile: function (tElement, tAttrs) {
        tElement.addClass(tAttrs.backdropClass);
        return linkFn;
      }
    };

    function linkFn(scope, element, attrs) {
      scope.animate = false;

      //trigger CSS transitions
      $timeout(function () {
        scope.animate = true;
      });
    }
  }])

  .directive('modalWindow', ['$modalStack', '$q', function ($modalStack, $q) {
    return {
      restrict: 'EA',
      scope: {
        index: '@',
        animate: '='
      },
      replace: true,
      transclude: true,
      templateUrl: function(tElement, tAttrs) {
        return tAttrs.templateUrl || 'template/modal/window.html';
      },
      link: function (scope, element, attrs) {
        element.addClass(attrs.windowClass || '');
        scope.size = attrs.size;

        scope.close = function (evt) {
          var modal = $modalStack.getTop();
          if (modal && modal.value.backdrop && modal.value.backdrop != 'static' && (evt.target === evt.currentTarget)) {
            evt.preventDefault();
            evt.stopPropagation();
            $modalStack.dismiss(modal.key, 'backdrop click');
          }
        };

        // This property is only added to the scope for the purpose of detecting when this directive is rendered.
        // We can detect that by using this property in the template associated with this directive and then use
        // {@link Attribute#$observe} on it. For more details please see {@link TableColumnResize}.
        scope.$isRendered = true;

        // Deferred object that will be resolved when this modal is render.
        var modalRenderDeferObj = $q.defer();
        // Observe function will be called on next digest cycle after compilation, ensuring that the DOM is ready.
        // In order to use this way of finding whether DOM is ready, we need to observe a scope property used in modal's template.
        attrs.$observe('modalRender', function (value) {
          if (value == 'true') {
            modalRenderDeferObj.resolve();
          }
        });

        modalRenderDeferObj.promise.then(function () {
          // trigger CSS transitions
          scope.animate = true;

          var inputsWithAutofocus = element[0].querySelectorAll('[autofocus]');
          /**
           * Auto-focusing of a freshly-opened modal element causes any child elements
           * with the autofocus attribute to lose focus. This is an issue on touch
           * based devices which will show and then hide the onscreen keyboard.
           * Attempts to refocus the autofocus element via JavaScript will not reopen
           * the onscreen keyboard. Fixed by updated the focusing logic to only autofocus
           * the modal element if the modal does not contain an autofocus element.
           */
          if (inputsWithAutofocus.length) {
            inputsWithAutofocus[0].focus();
          } else {
            element[0].focus();
          }

          // Notify {@link $modalStack} that modal is rendered.
          var modal = $modalStack.getTop();
          if (modal) {
            $modalStack.modalRendered(modal.key);
          }
        });
      }
    };
  }])

  .directive('enforceFocus',['$document', '$modalStack', function ($document, $modalStack) {
    return {
      link: function($scope, iElm) {
        var body = $document.find('body').eq(0);
        var trapFocusDomEl = angular.element('<div tabindex="0"></div>');
        body.append(trapFocusDomEl);


        function currentModal(){
          var modal = $modalStack.getTop();
          if (modal && modal.value) {
            return modal.value.modalDomEl[0] === iElm[0];
          }
        }

        //enforceFocus inside modal
        function enforceFocus(evt) {
          if (!currentModal()) {
            return;
          }
          if (iElm[0] !== evt.target && !iElm[0].contains(evt.target)) {
            iElm[0].focus();
          }
        }
        $document[0].addEventListener('focus', enforceFocus, true);


        //return lastFocusable element inside modal
        function lastFocusable(domEl) {
          var tababbleSelector = 'a[href], area[href], input:not([disabled]), button:not([disabled]),select:not([disabled]), textarea:not([disabled]), iframe, object, embed, *[tabindex], *[contenteditable]';
          var list = domEl.querySelectorAll(tababbleSelector);
          return list[list.length - 1];
        }

        var lastEl = lastFocusable(iElm[0]);
        //focus lastElement when shitKey Tab first element
        function shiftKeyTabTrap (evt) {
          if (!currentModal()) {
            return;
          }
          if(iElm[0] === evt.target && evt.shiftKey && evt.keyCode === 9){
            lastEl.focus();
            evt.preventDefault();
          }
        }
        $document.bind('keydown', shiftKeyTabTrap);


        $scope.$on('$destroy',function() {
          //Remove trap
          trapFocusDomEl.remove();
          //Remove event listener
          $document[0].removeEventListener('focus', enforceFocus, true);
          $document.unbind('keydown', shiftKeyTabTrap);
        });
      }
    };
  }])

  .directive('modalAnimationClass', [
    function () {
      return {
        compile: function (tElement, tAttrs) {
          if (tAttrs.modalAnimation) {
            tElement.addClass(tAttrs.modalAnimationClass);
          }
        }
      };
    }])

  .directive('modalTransclude', function () {
    return {
      link: function($scope, $element, $attrs, controller, $transclude) {
        $transclude($scope.$parent, function(clone) {
          $element.empty();
          $element.append(clone);
        });
      }
    };
  })

  .factory('$modalStack', ['$animate', '$timeout', '$document', '$compile', '$rootScope', '$$stackedMap',
    function ($animate, $timeout, $document, $compile, $rootScope, $$stackedMap) {

      var OPENED_MODAL_CLASS = 'modal-open';

      var backdropDomEl, backdropScope;
      var openedWindows = $$stackedMap.createNew();
      var $modalStack = {};

      function backdropIndex() {
        var topBackdropIndex = -1;
        var opened = openedWindows.keys();
        for (var i = 0; i < opened.length; i++) {
          if (openedWindows.get(opened[i]).value.backdrop) {
            topBackdropIndex = i;
          }
        }
        return topBackdropIndex;
      }

      $rootScope.$watch(backdropIndex, function(newBackdropIndex){
        if (backdropScope) {
          backdropScope.index = newBackdropIndex;
        }
      });

      function removeModalWindow(modalInstance) {

        var body = $document.find('body').eq(0);
        var modalWindow = openedWindows.get(modalInstance).value;

        //clean up the stack
        openedWindows.remove(modalInstance);

        //remove window DOM element
        removeAfterAnimate(modalWindow.modalDomEl, modalWindow.modalScope, function() {
          body.toggleClass(OPENED_MODAL_CLASS, openedWindows.length() > 0);
          checkRemoveBackdrop();
        });
      }

      function checkRemoveBackdrop() {
          //remove backdrop if no longer needed
          if (backdropDomEl && backdropIndex() == -1) {
            var backdropScopeRef = backdropScope;
            removeAfterAnimate(backdropDomEl, backdropScope, function () {
              backdropScopeRef = null;
            });
            backdropDomEl = undefined;
            backdropScope = undefined;
          }
      }

      function removeAfterAnimate(domEl, scope, done) {
        // Closing animation
        scope.animate = false;

        if (domEl.attr('modal-animation') && $animate.enabled()) {
          // transition out
          domEl.one('$animate:close', function closeFn() {
            $rootScope.$evalAsync(afterAnimating);
          });
        } else {
          // Ensure this call is async
          $timeout(afterAnimating);
        }

        function afterAnimating() {
          if (afterAnimating.done) {
            return;
          }
          afterAnimating.done = true;

          domEl.remove();
          scope.$destroy();
          if (done) {
            done();
          }
        }
      }

      $document.bind('keydown', function (evt) {
        var modal;

        if (evt.which === 27) {
          modal = openedWindows.top();
          if (modal && modal.value.keyboard) {
            evt.preventDefault();
            $rootScope.$apply(function () {
              $modalStack.dismiss(modal.key, 'escape key press');
            });
          }
        }
      });

      $modalStack.open = function (modalInstance, modal) {

        var modalOpener = $document[0].activeElement;

        openedWindows.add(modalInstance, {
          deferred: modal.deferred,
          renderDeferred: modal.renderDeferred,
          modalScope: modal.scope,
          backdrop: modal.backdrop,
          keyboard: modal.keyboard
        });

        var body = $document.find('body').eq(0),
            currBackdropIndex = backdropIndex();

        if (currBackdropIndex >= 0 && !backdropDomEl) {
          backdropScope = $rootScope.$new(true);
          backdropScope.index = currBackdropIndex;
          var angularBackgroundDomEl = angular.element('<div modal-backdrop="modal-backdrop"></div>');
          angularBackgroundDomEl.attr('backdrop-class', modal.backdropClass);
          if (modal.animation) {
            angularBackgroundDomEl.attr('modal-animation', 'true');
          }
          backdropDomEl = $compile(angularBackgroundDomEl)(backdropScope);
          body.append(backdropDomEl);
        }

        var angularDomEl = angular.element('<div enforce-focus modal-window="modal-window"></div>');
        angularDomEl.attr({
          'template-url': modal.windowTemplateUrl,
          'window-class': modal.windowClass,
          'size': modal.size,
          'index': openedWindows.length() - 1,
          'animate': 'animate'
        }).html(modal.content);
        if (modal.animation) {
          angularDomEl.attr('modal-animation', 'true');
        }

        var modalDomEl = $compile(angularDomEl)(modal.scope);
        openedWindows.top().value.modalDomEl = modalDomEl;
        openedWindows.top().value.modalOpener = modalOpener;
        body.append(modalDomEl);
        body.addClass(OPENED_MODAL_CLASS);
      };

      function broadcastClosing(modalWindow, resultOrReason, closing) {
          return !modalWindow.value.modalScope.$broadcast('modal.closing', resultOrReason, closing).defaultPrevented;
      }

      $modalStack.close = function (modalInstance, result) {
        var modalWindow = openedWindows.get(modalInstance);
        if (modalWindow && broadcastClosing(modalWindow, result, true)) {
          modalWindow.value.deferred.resolve(result);
          removeModalWindow(modalInstance);
          modalWindow.value.modalOpener.focus();
          return true;
        }
        return !modalWindow;
      };

      $modalStack.dismiss = function (modalInstance, reason) {
        var modalWindow = openedWindows.get(modalInstance);
        if (modalWindow && broadcastClosing(modalWindow, reason, false)) {
          modalWindow.value.deferred.reject(reason);
          removeModalWindow(modalInstance);
          modalWindow.value.modalOpener.focus();
          return true;
        }
        return !modalWindow;
      };

      $modalStack.dismissAll = function (reason) {
        var topModal = this.getTop();
        while (topModal && this.dismiss(topModal.key, reason)) {
          topModal = this.getTop();
        }
      };

      $modalStack.getTop = function () {
        return openedWindows.top();
      };

      $modalStack.modalRendered = function (modalInstance) {
        var modalWindow = openedWindows.get(modalInstance);
        if (modalWindow) {
          modalWindow.value.renderDeferred.resolve();
        }
      };

      return $modalStack;
    }])

  .provider('$modal', function () {

    var $modalProvider = {
      options: {
        animation: true,
        backdrop: true, //can also be false or 'static'
        keyboard: true
      },
      $get: ['$injector', '$rootScope', '$q', '$templateRequest', '$controller', '$modalStack',
        function ($injector, $rootScope, $q, $templateRequest, $controller, $modalStack) {

          var $modal = {};

          function getTemplatePromise(options) {
            return options.template ? $q.when(options.template) :
              $templateRequest(angular.isFunction(options.templateUrl) ? (options.templateUrl)() : options.templateUrl);
          }

          function getResolvePromises(resolves) {
            var promisesArr = [];
            angular.forEach(resolves, function (value) {
              if (angular.isFunction(value) || angular.isArray(value)) {
                promisesArr.push($q.when($injector.invoke(value)));
              }
            });
            return promisesArr;
          }

          $modal.open = function (modalOptions) {

            var modalResultDeferred = $q.defer();
            var modalOpenedDeferred = $q.defer();
            var modalRenderDeferred = $q.defer();

            //prepare an instance of a modal to be injected into controllers and returned to a caller
            var modalInstance = {
              result: modalResultDeferred.promise,
              opened: modalOpenedDeferred.promise,
              rendered: modalRenderDeferred.promise,
              close: function (result) {
                return $modalStack.close(modalInstance, result);
              },
              dismiss: function (reason) {
                return $modalStack.dismiss(modalInstance, reason);
              }
            };

            //merge and clean up options
            modalOptions = angular.extend({}, $modalProvider.options, modalOptions);
            modalOptions.resolve = modalOptions.resolve || {};

            //verify options
            if (!modalOptions.template && !modalOptions.templateUrl) {
              throw new Error('One of template or templateUrl options is required.');
            }

            var templateAndResolvePromise =
              $q.all([getTemplatePromise(modalOptions)].concat(getResolvePromises(modalOptions.resolve)));


            templateAndResolvePromise.then(function resolveSuccess(tplAndVars) {

              var modalScope = (modalOptions.scope || $rootScope).$new();
              modalScope.$close = modalInstance.close;
              modalScope.$dismiss = modalInstance.dismiss;

              var ctrlInstance, ctrlLocals = {};
              var resolveIter = 1;

              //controllers
              if (modalOptions.controller) {
                ctrlLocals.$scope = modalScope;
                ctrlLocals.$modalInstance = modalInstance;
                angular.forEach(modalOptions.resolve, function (value, key) {
                  ctrlLocals[key] = tplAndVars[resolveIter++];
                });

                ctrlInstance = $controller(modalOptions.controller, ctrlLocals);
                if (modalOptions.controllerAs) {
                  modalScope[modalOptions.controllerAs] = ctrlInstance;
                }
              }

              $modalStack.open(modalInstance, {
                scope: modalScope,
                deferred: modalResultDeferred,
                renderDeferred: modalRenderDeferred,
                content: tplAndVars[0],
                animation: modalOptions.animation,
                backdrop: modalOptions.backdrop,
                keyboard: modalOptions.keyboard,
                backdropClass: modalOptions.backdropClass,
                windowClass: modalOptions.windowClass,
                windowTemplateUrl: modalOptions.windowTemplateUrl,
                size: modalOptions.size
              });

            }, function resolveError(reason) {
              modalResultDeferred.reject(reason);
            });

            templateAndResolvePromise.then(function () {
              modalOpenedDeferred.resolve(true);
            }, function (reason) {
              modalOpenedDeferred.reject(reason);
            });

            return modalInstance;
          };

          return $modal;
        }]
    };

    return $modalProvider;
  });