ionic/js/angular/controller/navViewController.js at master · Java1024/ionic · GitHub

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IonicModule

.controller('$ionicNavView', [

'$scope',

'$element',

'$attrs',

'$compile',

'$controller',

'$ionicNavBarDelegate',

'$ionicNavViewDelegate',

'$ionicHistory',

'$ionicViewSwitcher',

'$ionicConfig',

'$ionicScrollDelegate',

'$ionicSideMenuDelegate',

function($scope, $element, $attrs, $compile, $controller, $ionicNavBarDelegate, $ionicNavViewDelegate, $ionicHistory, $ionicViewSwitcher, $ionicConfig, $ionicScrollDelegate, $ionicSideMenuDelegate) {

var DATA_ELE_IDENTIFIER = '$eleId';

var DATA_DESTROY_ELE = '$destroyEle';

var DATA_NO_CACHE = '$noCache';

var VIEW_STATUS_ACTIVE = 'active';

var VIEW_STATUS_CACHED = 'cached';

var self = this;

var direction;

var isPrimary = false;

var navBarDelegate;

var activeEleId;

var navViewAttr = $ionicViewSwitcher.navViewAttr;

var disableRenderStartViewId, disableAnimation;

self.scope = $scope;

self.element = $element;

self.init = function() {

var navViewName = $attrs.name || '';

// Find the details of the parent view directive (if any) and use it

// to derive our own qualified view name, then hang our own details

// off the DOM so child directives can find it.

var parent = $element.parent().inheritedData('$uiView');

var parentViewName = ((parent && parent.state) ? parent.state.name : '');

if (navViewName.indexOf('@') < 0) navViewName = navViewName + '@' + parentViewName;

var viewData = { name: navViewName, state: null };

$element.data('$uiView', viewData);

var deregisterInstance = $ionicNavViewDelegate._registerInstance(self, $attrs.delegateHandle);

$scope.$on('$destroy', function() {

deregisterInstance();

// ensure no scrolls have been left frozen

if (self.isSwipeFreeze) {

$ionicScrollDelegate.freezeAllScrolls(false);

}

});

$scope.$on('$ionicHistory.deselect', self.cacheCleanup);

$scope.$on('$ionicTabs.top', onTabsTop);

$scope.$on('$ionicSubheader', onBarSubheader);

$scope.$on('$ionicTabs.beforeLeave', onTabsLeave);

$scope.$on('$ionicTabs.afterLeave', onTabsLeave);

$scope.$on('$ionicTabs.leave', onTabsLeave);

ionic.Platform.ready(function() {

if ( ionic.Platform.isWebView() && ionic.Platform.isIOS() ) {

self.initSwipeBack();

}

});

return viewData;

};

self.register = function(viewLocals) {

var leavingView = extend({}, $ionicHistory.currentView());

// register that a view is coming in and get info on how it should transition

var registerData = $ionicHistory.register($scope, viewLocals);

// update which direction

self.update(registerData);

// begin rendering and transitioning

var enteringView = $ionicHistory.getViewById(registerData.viewId) || {};

var renderStart = (disableRenderStartViewId !== registerData.viewId);

self.render(registerData, viewLocals, enteringView, leavingView, renderStart, true);

};

self.update = function(registerData) {

// always reset that this is the primary navView

isPrimary = true;

// remember what direction this navView should use

// this may get updated later by a child navView

direction = registerData.direction;

var parentNavViewCtrl = $element.parent().inheritedData('$ionNavViewController');

if (parentNavViewCtrl) {

// this navView is nested inside another one

// update the parent to use this direction and not

// the other it originally was set to

// inform the parent navView that it is not the primary navView

parentNavViewCtrl.isPrimary(false);

if (direction === 'enter' || direction === 'exit') {

// they're entering/exiting a history

// find parent navViewController

parentNavViewCtrl.direction(direction);

if (direction === 'enter') {

// reset the direction so this navView doesn't animate

// because it's parent will

direction = 'none';

}

};

self.render = function(registerData, viewLocals, enteringView, leavingView, renderStart, renderEnd) {

// register the view and figure out where it lives in the various

// histories and nav stacks, along with how views should enter/leave

var switcher = $ionicViewSwitcher.create(self, viewLocals, enteringView, leavingView, renderStart, renderEnd);

// init the rendering of views for this navView directive

switcher.init(registerData, function() {

// the view is now compiled, in the dom and linked, now lets transition the views.

// this uses a callback incase THIS nav-view has a nested nav-view, and after the NESTED

// nav-view links, the NESTED nav-view would update which direction THIS nav-view should use

// kick off the transition of views

switcher.transition(self.direction(), registerData.enableBack, !disableAnimation);

// reset private vars for next time

disableRenderStartViewId = disableAnimation = null;

});

};

self.beforeEnter = function(transitionData) {

if (isPrimary) {

// only update this nav-view's nav-bar if this is the primary nav-view

navBarDelegate = transitionData.navBarDelegate;

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

associatedNavBarCtrl && associatedNavBarCtrl.update(transitionData);

navSwipeAttr('');

}

};

self.activeEleId = function(eleId) {

if (arguments.length) {

activeEleId = eleId;

}

return activeEleId;

};

self.transitionEnd = function() {

var viewElements = $element.children();

var x, l, viewElement;

for (x = 0, l = viewElements.length; x < l; x++) {

viewElement = viewElements.eq(x);

if (viewElement.data(DATA_ELE_IDENTIFIER) === activeEleId) {

// this is the active element

navViewAttr(viewElement, VIEW_STATUS_ACTIVE);

} else if (navViewAttr(viewElement) === 'leaving' || navViewAttr(viewElement) === VIEW_STATUS_ACTIVE || navViewAttr(viewElement) === VIEW_STATUS_CACHED) {

// this is a leaving element or was the former active element, or is an cached element

if (viewElement.data(DATA_DESTROY_ELE) || viewElement.data(DATA_NO_CACHE)) {

// this element shouldn't stay cached

$ionicViewSwitcher.destroyViewEle(viewElement);

} else {

// keep in the DOM, mark as cached

navViewAttr(viewElement, VIEW_STATUS_CACHED);

// disconnect the leaving scope

ionic.Utils.disconnectScope(viewElement.scope());

}

navSwipeAttr('');

// ensure no scrolls have been left frozen

if (self.isSwipeFreeze) {

$ionicScrollDelegate.freezeAllScrolls(false);

}

};

function onTabsLeave(ev, data) {

var viewElements = $element.children();

var viewElement, viewScope;

for (var x = 0, l = viewElements.length; x < l; x++) {

viewElement = viewElements.eq(x);

if (navViewAttr(viewElement) == VIEW_STATUS_ACTIVE) {

viewScope = viewElement.scope();

viewScope && viewScope.$emit(ev.name.replace('Tabs', 'View'), data);

viewScope && viewScope.$broadcast(ev.name.replace('Tabs', 'ParentView'), data);

break;

}

self.cacheCleanup = function() {

var viewElements = $element.children();

for (var x = 0, l = viewElements.length; x < l; x++) {

if (viewElements.eq(x).data(DATA_DESTROY_ELE)) {

$ionicViewSwitcher.destroyViewEle(viewElements.eq(x));

}

};

self.clearCache = function(stateIds) {

var viewElements = $element.children();

var viewElement, viewScope, x, l, y, eleIdentifier;

for (x = 0, l = viewElements.length; x < l; x++) {

viewElement = viewElements.eq(x);

if (stateIds) {

eleIdentifier = viewElement.data(DATA_ELE_IDENTIFIER);

for (y = 0; y < stateIds.length; y++) {

if (eleIdentifier === stateIds[y]) {

$ionicViewSwitcher.destroyViewEle(viewElement);

}

continue;

}

if (navViewAttr(viewElement) == VIEW_STATUS_CACHED) {

$ionicViewSwitcher.destroyViewEle(viewElement);

} else if (navViewAttr(viewElement) == VIEW_STATUS_ACTIVE) {

viewScope = viewElement.scope();

viewScope && viewScope.$broadcast('$ionicView.clearCache');

}

};

self.getViewElements = function() {

return $element.children();

};

self.appendViewElement = function(viewEle, viewLocals) {

// compile the entering element and get the link function

var linkFn = $compile(viewEle);

$element.append(viewEle);

var viewScope = $scope.$new();

if (viewLocals && viewLocals.$$controller) {

viewLocals.$scope = viewScope;

var controller = $controller(viewLocals.$$controller, viewLocals);

if (viewLocals.$$controllerAs) {

viewScope[viewLocals.$$controllerAs] = controller;

}

$element.children().data('$ngControllerController', controller);

}

linkFn(viewScope);

return viewScope;

};

self.title = function(val) {

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

associatedNavBarCtrl && associatedNavBarCtrl.title(val);

};

/**

* @ngdoc method

* @name $ionicNavView#enableBackButton

* @description Enable/disable if the back button can be shown or not. For

* example, the very first view in the navigation stack would not have a

* back view, so the back button would be disabled.

self.enableBackButton = function(shouldEnable) {

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

associatedNavBarCtrl && associatedNavBarCtrl.enableBackButton(shouldEnable);

};

/**

* @ngdoc method

* @name $ionicNavView#showBackButton

* @description Show/hide the nav bar active back button. If the back button

* is not possible this will not force the back button to show. The

* `enableBackButton()` method handles if a back button is even possible or not.

self.showBackButton = function(shouldShow) {

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

if (associatedNavBarCtrl) {

if (arguments.length) {

return associatedNavBarCtrl.showActiveBackButton(shouldShow);

}

return associatedNavBarCtrl.showActiveBackButton();

}

return true;

};

self.showBar = function(val) {

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

if (associatedNavBarCtrl) {

if (arguments.length) {

return associatedNavBarCtrl.showBar(val);

}

return associatedNavBarCtrl.showBar();

}

return true;

};

self.isPrimary = function(val) {

if (arguments.length) {

isPrimary = val;

}

return isPrimary;

};

self.direction = function(val) {

if (arguments.length) {

direction = val;

}

return direction;

};

self.initSwipeBack = function() {

var swipeBackHitWidth = $ionicConfig.views.swipeBackHitWidth();

var viewTransition, associatedNavBarCtrl, backView;

var deregDragStart, deregDrag, deregRelease;

var windowWidth, startDragX, dragPoints;

var cancelData = {};

function onDragStart(ev) {

if (!isPrimary || !$ionicConfig.views.swipeBackEnabled() || $ionicSideMenuDelegate.isOpenRight() ) return;

startDragX = getDragX(ev);

if (startDragX > swipeBackHitWidth) return;

backView = $ionicHistory.backView();

var currentView = $ionicHistory.currentView();

if (!backView || backView.historyId !== currentView.historyId || currentView.canSwipeBack === false) return;

if (!windowWidth) windowWidth = window.innerWidth;

self.isSwipeFreeze = $ionicScrollDelegate.freezeAllScrolls(true);

var registerData = {

direction: 'back'

};

dragPoints = [];

cancelData = {

showBar: self.showBar(),

showBackButton: self.showBackButton()

};

var switcher = $ionicViewSwitcher.create(self, registerData, backView, currentView, true, false);

switcher.loadViewElements(registerData);

switcher.render(registerData);

viewTransition = switcher.transition('back', $ionicHistory.enabledBack(backView), true);

associatedNavBarCtrl = getAssociatedNavBarCtrl();

deregDrag = ionic.onGesture('drag', onDrag, $element[0]);

deregRelease = ionic.onGesture('release', onRelease, $element[0]);

}

function onDrag(ev) {

if (isPrimary && viewTransition) {

var dragX = getDragX(ev);

dragPoints.push({

t: Date.now(),

x: dragX

});

if (dragX >= windowWidth - 15) {

onRelease(ev);

} else {

var step = Math.min(Math.max(getSwipeCompletion(dragX), 0), 1);

viewTransition.run(step);

associatedNavBarCtrl && associatedNavBarCtrl.activeTransition && associatedNavBarCtrl.activeTransition.run(step);

}

function onRelease(ev) {

if (isPrimary && viewTransition && dragPoints && dragPoints.length > 1) {

var now = Date.now();

var releaseX = getDragX(ev);

var startDrag = dragPoints[dragPoints.length - 1];

for (var x = dragPoints.length - 2; x >= 0; x--) {

if (now - startDrag.t > 200) {

break;

}

startDrag = dragPoints[x];

}

var isSwipingRight = (releaseX >= dragPoints[dragPoints.length - 2].x);

var releaseSwipeCompletion = getSwipeCompletion(releaseX);

var velocity = Math.abs(startDrag.x - releaseX) / (now - startDrag.t);

// private variables because ui-router has no way to pass custom data using $state.go

disableRenderStartViewId = backView.viewId;

disableAnimation = (releaseSwipeCompletion < 0.03 || releaseSwipeCompletion > 0.97);

if (isSwipingRight && (releaseSwipeCompletion > 0.5 || velocity > 0.1)) {

// complete view transition on release

var speed = (velocity > 0.5 || velocity < 0.05 || releaseX > windowWidth - 45) ? 'fast' : 'slow';

navSwipeAttr(disableAnimation ? '' : speed);

backView.go();

associatedNavBarCtrl && associatedNavBarCtrl.activeTransition && associatedNavBarCtrl.activeTransition.complete(!disableAnimation, speed);

} else {

// cancel view transition on release

navSwipeAttr(disableAnimation ? '' : 'fast');

disableRenderStartViewId = null;

viewTransition.cancel(!disableAnimation);

associatedNavBarCtrl && associatedNavBarCtrl.activeTransition && associatedNavBarCtrl.activeTransition.cancel(!disableAnimation, 'fast', cancelData);

disableAnimation = null;

}

ionic.offGesture(deregDrag, 'drag', onDrag);

ionic.offGesture(deregRelease, 'release', onRelease);

windowWidth = viewTransition = dragPoints = null;

self.isSwipeFreeze = $ionicScrollDelegate.freezeAllScrolls(false);

}

function getDragX(ev) {

return ionic.tap.pointerCoord(ev.gesture.srcEvent).x;

}

function getSwipeCompletion(dragX) {

return (dragX - startDragX) / windowWidth;

}

deregDragStart = ionic.onGesture('dragstart', onDragStart, $element[0]);

$scope.$on('$destroy', function() {

ionic.offGesture(deregDragStart, 'dragstart', onDragStart);

ionic.offGesture(deregDrag, 'drag', onDrag);

ionic.offGesture(deregRelease, 'release', onRelease);

self.element = viewTransition = associatedNavBarCtrl = null;

});

};

function navSwipeAttr(val) {

ionic.DomUtil.cachedAttr($element, 'nav-swipe', val);

}

function onTabsTop(ev, isTabsTop) {

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

associatedNavBarCtrl && associatedNavBarCtrl.hasTabsTop(isTabsTop);

}

function onBarSubheader(ev, isBarSubheader) {

var associatedNavBarCtrl = getAssociatedNavBarCtrl();

associatedNavBarCtrl && associatedNavBarCtrl.hasBarSubheader(isBarSubheader);

}

function getAssociatedNavBarCtrl() {

if (navBarDelegate) {

for (var x = 0; x < $ionicNavBarDelegate._instances.length; x++) {

if ($ionicNavBarDelegate._instances[x].$$delegateHandle == navBarDelegate) {

return $ionicNavBarDelegate._instances[x];

}

return $element.inheritedData('$ionNavBarController');

}

}]);

ionic/js/angular/controller/navViewController.js at master · Java1024/ionic · GitHub

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