mirror of
https://github.com/flynx/PortableMag.git
synced 2025-10-31 20:10:13 +00:00
408 lines
10 KiB
JavaScript
Executable File
408 lines
10 KiB
JavaScript
Executable File
/**********************************************************************
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*
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* XXX add copyright and licence info...
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*
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**********************************************************************/
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var SNAP_TO_PAGES_IN_RIBBON = false
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var DEFAULT_TRANSITION_DURATION = 200
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var INNERTIA_SCALE = 0.25
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/********************************************************** layout ***/
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var toggleThemes = createCSSClassToggler('.chrome', [
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'light-viewer',
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// this is the default (no class set)...
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'none',
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'dark-viewer'
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])
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var togglePageFitMode = createCSSClassToggler(
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'.chrome',
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'page-fit-to-viewer',
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function(action){
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if(action == 'on'){
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var n = getPageNumber()
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var scale = getMagazineScale()
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$(RESIZABLE_PAGES)
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.width($('.viewer').width() / scale)
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} else {
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var n = getPageNumber()
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$(RESIZABLE_PAGES).width('')
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}
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setCurrentPage(n)
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})
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var togglePageView = createCSSClassToggler(
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'.chrome',
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'full-page-view-mode',
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function(action){
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var view = $('.viewer')
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var page = $('.page')
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// XXX
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setTransitionDuration($('.magazine'), 0)
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var n = getPageNumber()
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if(action == 'on'){
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var scale = getPageTargetScale(1).value
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setMagazineScale(scale)
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//unanimated($('.magazine, .viewer'), togglePageFitMode)('on')
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togglePageFitMode('on')
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$('.viewer').trigger('fullScreenMode')
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} else {
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//unanimated($('.magazine, .viewer'), togglePageFitMode)('off')
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togglePageFitMode('off')
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var scale = getPageTargetScale(PAGES_IN_RIBBON).value
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setMagazineScale(scale)
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$('.viewer').trigger('ribbonMode')
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}
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// NOTE: can't disable transitions on this one because ScrollTo
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// uses jQuery animation...
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setCurrentPage(n)
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})
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/************************************************** event handlers ***/
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// Click
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// - in full page do the default click, if clicked on other page, select
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// - in ribbon, open clicked page in full mode
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function handleClick(evt, data){
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var target = getPageNumber(data.orig_event.target)
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if(target != -1){
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var mag = $('.magazine')
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if(togglePageView('?') == 'on'){
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setTransitionDuration(mag, DEFAULT_TRANSITION_DURATION)
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} else {
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togglePageView('on')
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}
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setCurrentPage(target)
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//setTransitionEasing(mag, 'ease')
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setTransitionEasing(mag, 'cubic-bezier(0.33,0.66,0.66,1)')
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}
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}
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// Long Click
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// - in full page, go to ribbon
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// - in ribbon, center clicked page
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function handleLongClick(evt, data){
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var target = getPageNumber(data.orig_event.target)
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if(target != -1){
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var mag = $('.magazine')
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if(togglePageView('?') == 'on'){
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togglePageView('off')
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} else {
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setTransitionDuration(mag, DEFAULT_TRANSITION_DURATION)
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}
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setCurrentPage(target)
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//setTransitionEasing(mag, 'ease')
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setTransitionEasing(mag, 'cubic-bezier(0.33,0.66,0.66,1)')
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}
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}
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// Swipe Left/Right
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// - in full page, next/prev page select
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// - in ribbon, kinetic scroll
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// - with two fingers, select next/prev article
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function makeSwipeHandler(actionA, actionB){
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return function(evt, data){
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// ribbon mode...
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if(togglePageView('?') == 'off'){
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// article navigation...
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if(data.touches >= 2){
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actionB($('.current.page'))
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return
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}
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// this makes things snap...
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if(SNAP_TO_PAGES_IN_RIBBON){
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setCurrentPage()
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return
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}
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return handleScrollRelease(evt, data)
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}
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// full page view...
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var mag = $('.magazine')
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//setTransitionEasing(mag, 'ease-out')
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setTransitionEasing(mag, 'cubic-bezier(0.33,0.66,0.66,1)')
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if(data.touches >= 2){
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actionB($('.current.page'))
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} else {
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actionA($('.current.page'))
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}
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}
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}
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var handleSwipeLeft = makeSwipeHandler(prevPage, prevArticle)
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var handleSwipeRight = makeSwipeHandler(nextPage, nextArticle)
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// Scroll Release
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// - check bounds and if out center first/last page
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// - filter out "throw" speeds below threshold
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// - do inertial scroll (within check bounds)
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// - snap to pages
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//
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// NOTE: this will also handle swipeUp/swopeDown as we do not
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// explicitly bind them...
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// NOTE: at this point this ONLY handles horizontal scroll...
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// XXX restore all the changed values...
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function handleScrollRelease(evt, data){
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var speed = data.speed.x
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var pages = $('.page')
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var mag = $('.magazine')
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// innertial scroll...
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// XXX make this generic...
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var t = DEFAULT_TRANSITION_DURATION * (1+Math.abs(speed))
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// XXX this is only horizontal at this point...
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var at = getElementShift(mag).left
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var to = (at + (t*speed*INNERTIA_SCALE))
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var first = getMagazineOffset(pages.first(), null, 'center')
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var last = getMagazineOffset(pages.last(), null, 'center')
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var easing
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// filter out really small speeds...
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if(Math.abs(speed) > 0.5){
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// check bounds...
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// NOTE: need to cut the distance and time if we are going the
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// hit the bounds...
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if(to > first){
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// trim the time proportionally...
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var _t = t
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t = Math.abs(t * ((at-first)/(at-to)))
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to = first
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//easing = 'linear'
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easing = 'cubic-bezier(0.33,0.66,0.66,1)'
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} else if(to < last){
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// trim the time proportionally...
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var _t = t
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t = Math.abs(t * ((at-last)/(at-to)))
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to = last
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//easing = 'linear'
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easing = 'cubic-bezier(0.33,0.66,0.66,1)'
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} else {
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//easing = 'ease-out'
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easing = 'cubic-bezier(0.33,0.66,0.66,1)'
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}
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animateElementTo(mag, to, t, easing, speed)
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// check scroll bounds...
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// do not let the user scroll out of view...
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} else {
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if(at > first){
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//animateElementTo(mag, first, DEFAULT_TRANSITION_DURATION, 'ease-in')
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animateElementTo(mag, first,
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DEFAULT_TRANSITION_DURATION,
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'cubic-bezier(0.33,0.66,0.66,1)')
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} else if(at < last){
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//animateElementTo(mag, last, DEFAULT_TRANSITION_DURATION, 'ease-in')
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animateElementTo(mag, last,
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DEFAULT_TRANSITION_DURATION,
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'cubic-bezier(0.33,0.66,0.66,1)')
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}
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}
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}
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/********************************************************* helpers ***/
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function getPageInMagazineOffset(page, scale){
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if(page == null){
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page = $('.current.page')
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} else if(typeof(page) == typeof(7)){
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page = $($('.page')[page])
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}
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return page.position().left / (scale == null ? getMagazineScale() : scale)
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}
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// XXX there is something here that depends on scale that is either not
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// compensated, or is over compensated...
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function getMagazineOffset(page, scale, align){
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if(page == null){
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page = $('.current.page')
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// if no current page get the first...
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if(page.length == 0){
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page = $('.page').first()
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}
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}
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if(scale == null){
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scale = getMagazineScale()
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}
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if(align == null){
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align = getPageAlign(page)
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}
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var mag = $('.magazine')
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// calculate the align offset...
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if(align == 'left'){
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var offset = 0
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} else if(align == 'right'){
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var offset = $('.viewer').width() - page.width()*scale
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// center (default)
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} else {
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var offset = $('.viewer').width()/2 - (page.width()/2)*scale
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}
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// NOTE: this without scaling also represents the inner width of
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// the viewer...
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var w = mag.outerWidth(true)
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// XXX this depends on scale...
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//var pos = getPageInMagazineOffset(page, scale)
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var pos = page.position().left//*scale
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var l = 0
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return -((w - w*scale)/2 + pos) + offset
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}
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function getPageNumber(page){
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// a page/element is given explicitly...
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if(page != null){
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page = $(page)
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if(!page.hasClass('page')){
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page = page.parents('.page')
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}
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return $('.page').index(page)
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}
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// current page index...
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if(togglePageView('?') == 'on'){
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return $('.page').index($('.current.page'))
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// get the closest page to view center...
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// NOTE: this ignores page aligns and only gets the page who's center
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// is closer to view's center
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} else {
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var scale = getMagazineScale()
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var o = -$($('.magazine')[0]).offset().left - $('.viewer').offset().left
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var W = $('.viewer').width()
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var cur = -1
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var res = $('.page').map(function(i, e){
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e = $(e)
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var l = e.position().left
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var w = e.width()*scale
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return Math.abs((l+(w/2)) - (o+(W/2)))
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}).toArray()
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cur = res.indexOf(Math.min.apply(Math, res))
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return cur
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}
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}
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function getMagazineScale(){
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return getElementScale($('.magazine'))
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}
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function setMagazineScale(scale){
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var mag = $('.magazine')
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var cur = $('.current.page')
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if(cur.length == 0){
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cur = $('.page').first()
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}
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// center-align ribbon view pages...
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var align = togglePageView('?') == 'off' ? 'center' : null
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var left = getMagazineOffset(cur, scale, align)
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setElementTransform(mag, left, scale)
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return mag
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}
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/********************************************************* actions ***/
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function setCurrentPage(n, use_transitions){
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if(n == null){
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n = getPageNumber()
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}
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if(typeof(n) != typeof(3)){
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n = getPageNumber(n)
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}
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var l = $('.page').length
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// normalize the number...
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n = n < 0 ? l - n : n
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n = n < -l ? 0 : n
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n = n >= l ? l - 1 : n
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use_transitions = use_transitions != null ?
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use_transitions
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: USE_TRANSITIONS_FOR_ANIMATION
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$('.current.page').removeClass('current')
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$($('.page')[n]).addClass('current')
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var cur = $('.current.page')
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// center-align pages in ribbon view...
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var align = togglePageView('?') == 'off' ? 'center' : null
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var left = getMagazineOffset(cur, null, align)
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if(use_transitions){
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setElementTransform($('.magazine'), left)
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} else {
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animateElementTo($('.magazine'), left)
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}
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$('.viewer').trigger('pageChanged', n)
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return cur
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}
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function nextPage(page){
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// XXX is this the right place for this?
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setTransitionDuration($('.magazine'), DEFAULT_TRANSITION_DURATION)
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setCurrentPage(getPageNumber(page)+1)
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}
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function prevPage(page){
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// XXX is this the right place for this?
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setTransitionDuration($('.magazine'), DEFAULT_TRANSITION_DURATION)
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var n = getPageNumber(page)-1
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n = n < 0 ? 0 : n
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setCurrentPage(n)
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}
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function firstPage(){
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// XXX is this the right place for this?
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setTransitionDuration($('.magazine'), DEFAULT_TRANSITION_DURATION)
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setCurrentPage(0)
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}
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function lastPage(){
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// XXX is this the right place for this?
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setTransitionDuration($('.magazine'), DEFAULT_TRANSITION_DURATION)
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setCurrentPage(-1)
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}
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/**********************************************************************
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* vim:set ts=4 sw=4 : */
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