ionic-angular
Version:
[](https://circleci.com/gh/driftyco/ionic)
384 lines (310 loc) • 11.2 kB
JavaScript
IonicModule
.controller('$ionicHeaderBar', [
'$scope',
'$element',
'$attrs',
'$q',
'$ionicConfig',
'$ionicHistory',
function($scope, $element, $attrs, $q, $ionicConfig, $ionicHistory) {
var TITLE = 'title';
var BACK_TEXT = 'back-text';
var BACK_BUTTON = 'back-button';
var DEFAULT_TITLE = 'default-title';
var PREVIOUS_TITLE = 'previous-title';
var HIDE = 'hide';
var self = this;
var titleText = '';
var previousTitleText = '';
var titleLeft = 0;
var titleRight = 0;
var titleCss = '';
var isBackEnabled = false;
var isBackShown = true;
var isNavBackShown = true;
var isBackElementShown = false;
var titleTextWidth = 0;
self.beforeEnter = function(viewData) {
$scope.$broadcast('$ionicView.beforeEnter', viewData);
};
self.title = function(newTitleText) {
if (arguments.length && newTitleText !== titleText) {
getEle(TITLE).innerHTML = newTitleText;
titleText = newTitleText;
titleTextWidth = 0;
}
return titleText;
};
self.enableBack = function(shouldEnable, disableReset) {
// whether or not the back button show be visible, according
// to the navigation and history
if (arguments.length) {
isBackEnabled = shouldEnable;
if (!disableReset) self.updateBackButton();
}
return isBackEnabled;
};
self.showBack = function(shouldShow, disableReset) {
// different from enableBack() because this will always have the back
// visually hidden if false, even if the history says it should show
if (arguments.length) {
isBackShown = shouldShow;
if (!disableReset) self.updateBackButton();
}
return isBackShown;
};
self.showNavBack = function(shouldShow) {
// different from showBack() because this is for the entire nav bar's
// setting for all of it's child headers. For internal use.
isNavBackShown = shouldShow;
self.updateBackButton();
};
self.updateBackButton = function() {
var ele;
if ((isBackShown && isNavBackShown && isBackEnabled) !== isBackElementShown) {
isBackElementShown = isBackShown && isNavBackShown && isBackEnabled;
ele = getEle(BACK_BUTTON);
ele && ele.classList[ isBackElementShown ? 'remove' : 'add' ](HIDE);
}
if (isBackEnabled) {
ele = ele || getEle(BACK_BUTTON);
if (ele) {
if (self.backButtonIcon !== $ionicConfig.backButton.icon()) {
ele = getEle(BACK_BUTTON + ' .icon');
if (ele) {
self.backButtonIcon = $ionicConfig.backButton.icon();
ele.className = 'icon ' + self.backButtonIcon;
}
}
if (self.backButtonText !== $ionicConfig.backButton.text()) {
ele = getEle(BACK_BUTTON + ' .back-text');
if (ele) {
ele.textContent = self.backButtonText = $ionicConfig.backButton.text();
}
}
}
}
};
self.titleTextWidth = function() {
var element = getEle(TITLE);
if ( element ) {
// If the element has a nav-bar-title, use that instead
// to calculate the width of the title
var children = angular.element(element).children();
for ( var i = 0; i < children.length; i++ ) {
if ( angular.element(children[i]).hasClass('nav-bar-title') ) {
element = children[i];
break;
}
}
}
var bounds = ionic.DomUtil.getTextBounds(element);
titleTextWidth = Math.min(bounds && bounds.width || 30);
return titleTextWidth;
};
self.titleWidth = function() {
var titleWidth = self.titleTextWidth();
var offsetWidth = getEle(TITLE).offsetWidth;
if (offsetWidth < titleWidth) {
titleWidth = offsetWidth + (titleLeft - titleRight - 5);
}
return titleWidth;
};
self.titleTextX = function() {
return ($element[0].offsetWidth / 2) - (self.titleWidth() / 2);
};
self.titleLeftRight = function() {
return titleLeft - titleRight;
};
self.backButtonTextLeft = function() {
var offsetLeft = 0;
var ele = getEle(BACK_TEXT);
while (ele) {
offsetLeft += ele.offsetLeft;
ele = ele.parentElement;
}
return offsetLeft;
};
self.resetBackButton = function(viewData) {
if ($ionicConfig.backButton.previousTitleText()) {
var previousTitleEle = getEle(PREVIOUS_TITLE);
if (previousTitleEle) {
previousTitleEle.classList.remove(HIDE);
var view = (viewData && $ionicHistory.getViewById(viewData.viewId));
var newPreviousTitleText = $ionicHistory.backTitle(view);
if (newPreviousTitleText !== previousTitleText) {
previousTitleText = previousTitleEle.innerHTML = newPreviousTitleText;
}
}
var defaultTitleEle = getEle(DEFAULT_TITLE);
if (defaultTitleEle) {
defaultTitleEle.classList.remove(HIDE);
}
}
};
self.align = function(textAlign) {
var titleEle = getEle(TITLE);
textAlign = textAlign || $attrs.alignTitle || $ionicConfig.navBar.alignTitle();
var widths = self.calcWidths(textAlign, false);
if (isBackShown && previousTitleText && $ionicConfig.backButton.previousTitleText()) {
var previousTitleWidths = self.calcWidths(textAlign, true);
var availableTitleWidth = $element[0].offsetWidth - previousTitleWidths.titleLeft - previousTitleWidths.titleRight;
if (self.titleTextWidth() <= availableTitleWidth) {
widths = previousTitleWidths;
}
}
return self.updatePositions(titleEle, widths.titleLeft, widths.titleRight, widths.buttonsLeft, widths.buttonsRight, widths.css, widths.showPrevTitle);
};
self.calcWidths = function(textAlign, isPreviousTitle) {
var titleEle = getEle(TITLE);
var backBtnEle = getEle(BACK_BUTTON);
var x, y, z, b, c, d, childSize, bounds;
var childNodes = $element[0].childNodes;
var buttonsLeft = 0;
var buttonsRight = 0;
var isCountRightOfTitle;
var updateTitleLeft = 0;
var updateTitleRight = 0;
var updateCss = '';
var backButtonWidth = 0;
// Compute how wide the left children are
// Skip all titles (there may still be two titles, one leaving the dom)
// Once we encounter a titleEle, realize we are now counting the right-buttons, not left
for (x = 0; x < childNodes.length; x++) {
c = childNodes[x];
childSize = 0;
if (c.nodeType == 1) {
// element node
if (c === titleEle) {
isCountRightOfTitle = true;
continue;
}
if (c.classList.contains(HIDE)) {
continue;
}
if (isBackShown && c === backBtnEle) {
for (y = 0; y < c.childNodes.length; y++) {
b = c.childNodes[y];
if (b.nodeType == 1) {
if (b.classList.contains(BACK_TEXT)) {
for (z = 0; z < b.children.length; z++) {
d = b.children[z];
if (isPreviousTitle) {
if (d.classList.contains(DEFAULT_TITLE)) continue;
backButtonWidth += d.offsetWidth;
} else {
if (d.classList.contains(PREVIOUS_TITLE)) continue;
backButtonWidth += d.offsetWidth;
}
}
} else {
backButtonWidth += b.offsetWidth;
}
} else if (b.nodeType == 3 && b.nodeValue.trim()) {
bounds = ionic.DomUtil.getTextBounds(b);
backButtonWidth += bounds && bounds.width || 0;
}
}
childSize = backButtonWidth || c.offsetWidth;
} else {
// not the title, not the back button, not a hidden element
childSize = c.offsetWidth;
}
} else if (c.nodeType == 3 && c.nodeValue.trim()) {
// text node
bounds = ionic.DomUtil.getTextBounds(c);
childSize = bounds && bounds.width || 0;
}
if (isCountRightOfTitle) {
buttonsRight += childSize;
} else {
buttonsLeft += childSize;
}
}
// Size and align the header titleEle based on the sizes of the left and
// right children, and the desired alignment mode
if (textAlign == 'left') {
updateCss = 'title-left';
if (buttonsLeft) {
updateTitleLeft = buttonsLeft + 15;
}
if (buttonsRight) {
updateTitleRight = buttonsRight + 15;
}
} else if (textAlign == 'right') {
updateCss = 'title-right';
if (buttonsLeft) {
updateTitleLeft = buttonsLeft + 15;
}
if (buttonsRight) {
updateTitleRight = buttonsRight + 15;
}
} else {
// center the default
var margin = Math.max(buttonsLeft, buttonsRight) + 10;
if (margin > 10) {
updateTitleLeft = updateTitleRight = margin;
}
}
return {
backButtonWidth: backButtonWidth,
buttonsLeft: buttonsLeft,
buttonsRight: buttonsRight,
titleLeft: updateTitleLeft,
titleRight: updateTitleRight,
showPrevTitle: isPreviousTitle,
css: updateCss
};
};
self.updatePositions = function(titleEle, updateTitleLeft, updateTitleRight, buttonsLeft, buttonsRight, updateCss, showPreviousTitle) {
var deferred = $q.defer();
// only make DOM updates when there are actual changes
if (titleEle) {
if (updateTitleLeft !== titleLeft) {
titleEle.style.left = updateTitleLeft ? updateTitleLeft + 'px' : '';
titleLeft = updateTitleLeft;
}
if (updateTitleRight !== titleRight) {
titleEle.style.right = updateTitleRight ? updateTitleRight + 'px' : '';
titleRight = updateTitleRight;
}
if (updateCss !== titleCss) {
updateCss && titleEle.classList.add(updateCss);
titleCss && titleEle.classList.remove(titleCss);
titleCss = updateCss;
}
}
if ($ionicConfig.backButton.previousTitleText()) {
var prevTitle = getEle(PREVIOUS_TITLE);
var defaultTitle = getEle(DEFAULT_TITLE);
prevTitle && prevTitle.classList[ showPreviousTitle ? 'remove' : 'add'](HIDE);
defaultTitle && defaultTitle.classList[ showPreviousTitle ? 'add' : 'remove'](HIDE);
}
ionic.requestAnimationFrame(function() {
if (titleEle && titleEle.offsetWidth + 10 < titleEle.scrollWidth) {
var minRight = buttonsRight + 5;
var testRight = $element[0].offsetWidth - titleLeft - self.titleTextWidth() - 20;
updateTitleRight = testRight < minRight ? minRight : testRight;
if (updateTitleRight !== titleRight) {
titleEle.style.right = updateTitleRight + 'px';
titleRight = updateTitleRight;
}
}
deferred.resolve();
});
return deferred.promise;
};
self.setCss = function(elementClassname, css) {
ionic.DomUtil.cachedStyles(getEle(elementClassname), css);
};
var eleCache = {};
function getEle(className) {
if (!eleCache[className]) {
eleCache[className] = $element[0].querySelector('.' + className);
}
return eleCache[className];
}
$scope.$on('$destroy', function() {
for (var n in eleCache) eleCache[n] = null;
});
}]);