Convert presentation mode to ES6 syntax
This commit is contained in:
Tim van der Meij
parent
3554a93c2b
commit
ccdc7ba3c8
@ -15,10 +15,19 @@
|
||||
|
||||
import { normalizeWheelEventDelta } from './ui_utils';
|
||||
|
||||
var DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS = 1500; // in ms
|
||||
var DELAY_BEFORE_HIDING_CONTROLS = 3000; // in ms
|
||||
var ACTIVE_SELECTOR = 'pdfPresentationMode';
|
||||
var CONTROLS_SELECTOR = 'pdfPresentationModeControls';
|
||||
const DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS = 1500; // in ms
|
||||
const DELAY_BEFORE_HIDING_CONTROLS = 3000; // in ms
|
||||
const ACTIVE_SELECTOR = 'pdfPresentationMode';
|
||||
const CONTROLS_SELECTOR = 'pdfPresentationModeControls';
|
||||
const MOUSE_SCROLL_COOLDOWN_TIME = 50; // in ms
|
||||
const PAGE_SWITCH_THRESHOLD = 0.1;
|
||||
|
||||
// Number of CSS pixels for a movement to count as a swipe.
|
||||
const SWIPE_MIN_DISTANCE_THRESHOLD = 50;
|
||||
|
||||
// Swipe angle deviation from the x or y axis before it is not
|
||||
// considered a swipe in that direction any more.
|
||||
const SWIPE_ANGLE_THRESHOLD = Math.PI / 6;
|
||||
|
||||
/**
|
||||
* @typedef {Object} PDFPresentationModeOptions
|
||||
@ -30,15 +39,11 @@ var CONTROLS_SELECTOR = 'pdfPresentationModeControls';
|
||||
* to the context menu in Presentation Mode.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @class
|
||||
*/
|
||||
var PDFPresentationMode = (function PDFPresentationModeClosure() {
|
||||
class PDFPresentationMode {
|
||||
/**
|
||||
* @constructs PDFPresentationMode
|
||||
* @param {PDFPresentationModeOptions} options
|
||||
*/
|
||||
function PDFPresentationMode(options) {
|
||||
constructor(options) {
|
||||
this.container = options.container;
|
||||
this.viewer = options.viewer || options.container.firstElementChild;
|
||||
this.pdfViewer = options.pdfViewer;
|
||||
@ -53,457 +58,432 @@ var PDFPresentationMode = (function PDFPresentationModeClosure() {
|
||||
this.touchSwipeState = null;
|
||||
|
||||
if (contextMenuItems) {
|
||||
contextMenuItems.contextFirstPage.addEventListener('click',
|
||||
function PDFPresentationMode_contextFirstPageClick(e) {
|
||||
contextMenuItems.contextFirstPage.addEventListener('click', () => {
|
||||
this.contextMenuOpen = false;
|
||||
this.eventBus.dispatch('firstpage');
|
||||
}.bind(this));
|
||||
contextMenuItems.contextLastPage.addEventListener('click',
|
||||
function PDFPresentationMode_contextLastPageClick(e) {
|
||||
});
|
||||
contextMenuItems.contextLastPage.addEventListener('click', () => {
|
||||
this.contextMenuOpen = false;
|
||||
this.eventBus.dispatch('lastpage');
|
||||
}.bind(this));
|
||||
contextMenuItems.contextPageRotateCw.addEventListener('click',
|
||||
function PDFPresentationMode_contextPageRotateCwClick(e) {
|
||||
});
|
||||
contextMenuItems.contextPageRotateCw.addEventListener('click', () => {
|
||||
this.contextMenuOpen = false;
|
||||
this.eventBus.dispatch('rotatecw');
|
||||
}.bind(this));
|
||||
contextMenuItems.contextPageRotateCcw.addEventListener('click',
|
||||
function PDFPresentationMode_contextPageRotateCcwClick(e) {
|
||||
});
|
||||
contextMenuItems.contextPageRotateCcw.addEventListener('click', () => {
|
||||
this.contextMenuOpen = false;
|
||||
this.eventBus.dispatch('rotateccw');
|
||||
}.bind(this));
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
PDFPresentationMode.prototype = {
|
||||
/**
|
||||
* Request the browser to enter fullscreen mode.
|
||||
* @returns {boolean} Indicating if the request was successful.
|
||||
*/
|
||||
request: function PDFPresentationMode_request() {
|
||||
if (this.switchInProgress || this.active ||
|
||||
!this.viewer.hasChildNodes()) {
|
||||
return false;
|
||||
}
|
||||
this._addFullscreenChangeListeners();
|
||||
this._setSwitchInProgress();
|
||||
this._notifyStateChange();
|
||||
/**
|
||||
* Request the browser to enter fullscreen mode.
|
||||
* @returns {boolean} Indicating if the request was successful.
|
||||
*/
|
||||
request() {
|
||||
if (this.switchInProgress || this.active || !this.viewer.hasChildNodes()) {
|
||||
return false;
|
||||
}
|
||||
this._addFullscreenChangeListeners();
|
||||
this._setSwitchInProgress();
|
||||
this._notifyStateChange();
|
||||
|
||||
if (this.container.requestFullscreen) {
|
||||
this.container.requestFullscreen();
|
||||
} else if (this.container.mozRequestFullScreen) {
|
||||
this.container.mozRequestFullScreen();
|
||||
} else if (this.container.webkitRequestFullscreen) {
|
||||
this.container.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
|
||||
} else if (this.container.msRequestFullscreen) {
|
||||
this.container.msRequestFullscreen();
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
if (this.container.requestFullscreen) {
|
||||
this.container.requestFullscreen();
|
||||
} else if (this.container.mozRequestFullScreen) {
|
||||
this.container.mozRequestFullScreen();
|
||||
} else if (this.container.webkitRequestFullscreen) {
|
||||
this.container.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
|
||||
} else if (this.container.msRequestFullscreen) {
|
||||
this.container.msRequestFullscreen();
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
|
||||
this.args = {
|
||||
page: this.pdfViewer.currentPageNumber,
|
||||
previousScale: this.pdfViewer.currentScaleValue,
|
||||
};
|
||||
this.args = {
|
||||
page: this.pdfViewer.currentPageNumber,
|
||||
previousScale: this.pdfViewer.currentScaleValue,
|
||||
};
|
||||
|
||||
return true;
|
||||
},
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_mouseWheel: function PDFPresentationMode_mouseWheel(evt) {
|
||||
if (!this.active) {
|
||||
return;
|
||||
}
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_mouseWheel(evt) {
|
||||
if (!this.active) {
|
||||
return;
|
||||
}
|
||||
|
||||
evt.preventDefault();
|
||||
evt.preventDefault();
|
||||
|
||||
var delta = normalizeWheelEventDelta(evt);
|
||||
var delta = normalizeWheelEventDelta(evt);
|
||||
var currentTime = (new Date()).getTime();
|
||||
var storedTime = this.mouseScrollTimeStamp;
|
||||
|
||||
var MOUSE_SCROLL_COOLDOWN_TIME = 50;
|
||||
var PAGE_SWITCH_THRESHOLD = 0.1;
|
||||
|
||||
var currentTime = (new Date()).getTime();
|
||||
var storedTime = this.mouseScrollTimeStamp;
|
||||
|
||||
// If we've already switched page, avoid accidentally switching again.
|
||||
if (currentTime > storedTime &&
|
||||
currentTime - storedTime < MOUSE_SCROLL_COOLDOWN_TIME) {
|
||||
return;
|
||||
}
|
||||
// If the scroll direction changed, reset the accumulated scroll delta.
|
||||
if ((this.mouseScrollDelta > 0 && delta < 0) ||
|
||||
(this.mouseScrollDelta < 0 && delta > 0)) {
|
||||
this._resetMouseScrollState();
|
||||
}
|
||||
this.mouseScrollDelta += delta;
|
||||
|
||||
if (Math.abs(this.mouseScrollDelta) >= PAGE_SWITCH_THRESHOLD) {
|
||||
var totalDelta = this.mouseScrollDelta;
|
||||
this._resetMouseScrollState();
|
||||
var success = totalDelta > 0 ? this._goToPreviousPage()
|
||||
: this._goToNextPage();
|
||||
if (success) {
|
||||
this.mouseScrollTimeStamp = currentTime;
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
get isFullscreen() {
|
||||
return !!(document.fullscreenElement ||
|
||||
document.mozFullScreen ||
|
||||
document.webkitIsFullScreen ||
|
||||
document.msFullscreenElement);
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_goToPreviousPage: function PDFPresentationMode_goToPreviousPage() {
|
||||
var page = this.pdfViewer.currentPageNumber;
|
||||
// If we're at the first page, we don't need to do anything.
|
||||
if (page <= 1) {
|
||||
return false;
|
||||
}
|
||||
this.pdfViewer.currentPageNumber = (page - 1);
|
||||
return true;
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_goToNextPage: function PDFPresentationMode_goToNextPage() {
|
||||
var page = this.pdfViewer.currentPageNumber;
|
||||
// If we're at the last page, we don't need to do anything.
|
||||
if (page >= this.pdfViewer.pagesCount) {
|
||||
return false;
|
||||
}
|
||||
this.pdfViewer.currentPageNumber = (page + 1);
|
||||
return true;
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_notifyStateChange: function PDFPresentationMode_notifyStateChange() {
|
||||
this.eventBus.dispatch('presentationmodechanged', {
|
||||
source: this,
|
||||
active: this.active,
|
||||
switchInProgress: !!this.switchInProgress
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Used to initialize a timeout when requesting Presentation Mode,
|
||||
* i.e. when the browser is requested to enter fullscreen mode.
|
||||
* This timeout is used to prevent the current page from being scrolled
|
||||
* partially, or completely, out of view when entering Presentation Mode.
|
||||
* NOTE: This issue seems limited to certain zoom levels (e.g. page-width).
|
||||
* @private
|
||||
*/
|
||||
_setSwitchInProgress: function PDFPresentationMode_setSwitchInProgress() {
|
||||
if (this.switchInProgress) {
|
||||
clearTimeout(this.switchInProgress);
|
||||
}
|
||||
this.switchInProgress = setTimeout(function switchInProgressTimeout() {
|
||||
this._removeFullscreenChangeListeners();
|
||||
delete this.switchInProgress;
|
||||
this._notifyStateChange();
|
||||
}.bind(this), DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS);
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_resetSwitchInProgress:
|
||||
function PDFPresentationMode_resetSwitchInProgress() {
|
||||
if (this.switchInProgress) {
|
||||
clearTimeout(this.switchInProgress);
|
||||
delete this.switchInProgress;
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_enter: function PDFPresentationMode_enter() {
|
||||
this.active = true;
|
||||
this._resetSwitchInProgress();
|
||||
this._notifyStateChange();
|
||||
this.container.classList.add(ACTIVE_SELECTOR);
|
||||
|
||||
// Ensure that the correct page is scrolled into view when entering
|
||||
// Presentation Mode, by waiting until fullscreen mode in enabled.
|
||||
setTimeout(function enterPresentationModeTimeout() {
|
||||
this.pdfViewer.currentPageNumber = this.args.page;
|
||||
this.pdfViewer.currentScaleValue = 'page-fit';
|
||||
}.bind(this), 0);
|
||||
|
||||
this._addWindowListeners();
|
||||
this._showControls();
|
||||
this.contextMenuOpen = false;
|
||||
this.container.setAttribute('contextmenu', 'viewerContextMenu');
|
||||
|
||||
// Text selection is disabled in Presentation Mode, thus it's not possible
|
||||
// for the user to deselect text that is selected (e.g. with "Select all")
|
||||
// when entering Presentation Mode, hence we remove any active selection.
|
||||
window.getSelection().removeAllRanges();
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_exit: function PDFPresentationMode_exit() {
|
||||
var page = this.pdfViewer.currentPageNumber;
|
||||
this.container.classList.remove(ACTIVE_SELECTOR);
|
||||
|
||||
// Ensure that the correct page is scrolled into view when exiting
|
||||
// Presentation Mode, by waiting until fullscreen mode is disabled.
|
||||
setTimeout(function exitPresentationModeTimeout() {
|
||||
this.active = false;
|
||||
this._removeFullscreenChangeListeners();
|
||||
this._notifyStateChange();
|
||||
|
||||
this.pdfViewer.currentScaleValue = this.args.previousScale;
|
||||
this.pdfViewer.currentPageNumber = page;
|
||||
this.args = null;
|
||||
}.bind(this), 0);
|
||||
|
||||
this._removeWindowListeners();
|
||||
this._hideControls();
|
||||
// If we've already switched page, avoid accidentally switching again.
|
||||
if (currentTime > storedTime &&
|
||||
currentTime - storedTime < MOUSE_SCROLL_COOLDOWN_TIME) {
|
||||
return;
|
||||
}
|
||||
// If the scroll direction changed, reset the accumulated scroll delta.
|
||||
if ((this.mouseScrollDelta > 0 && delta < 0) ||
|
||||
(this.mouseScrollDelta < 0 && delta > 0)) {
|
||||
this._resetMouseScrollState();
|
||||
this.container.removeAttribute('contextmenu');
|
||||
}
|
||||
this.mouseScrollDelta += delta;
|
||||
|
||||
if (Math.abs(this.mouseScrollDelta) >= PAGE_SWITCH_THRESHOLD) {
|
||||
var totalDelta = this.mouseScrollDelta;
|
||||
this._resetMouseScrollState();
|
||||
var success = totalDelta > 0 ? this._goToPreviousPage()
|
||||
: this._goToNextPage();
|
||||
if (success) {
|
||||
this.mouseScrollTimeStamp = currentTime;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
get isFullscreen() {
|
||||
return !!(document.fullscreenElement || document.mozFullScreen ||
|
||||
document.webkitIsFullScreen || document.msFullscreenElement);
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_goToPreviousPage() {
|
||||
var page = this.pdfViewer.currentPageNumber;
|
||||
// If we're at the first page, we don't need to do anything.
|
||||
if (page <= 1) {
|
||||
return false;
|
||||
}
|
||||
this.pdfViewer.currentPageNumber = (page - 1);
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_goToNextPage() {
|
||||
var page = this.pdfViewer.currentPageNumber;
|
||||
// If we're at the last page, we don't need to do anything.
|
||||
if (page >= this.pdfViewer.pagesCount) {
|
||||
return false;
|
||||
}
|
||||
this.pdfViewer.currentPageNumber = (page + 1);
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_notifyStateChange() {
|
||||
this.eventBus.dispatch('presentationmodechanged', {
|
||||
source: this,
|
||||
active: this.active,
|
||||
switchInProgress: !!this.switchInProgress,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Used to initialize a timeout when requesting Presentation Mode,
|
||||
* i.e. when the browser is requested to enter fullscreen mode.
|
||||
* This timeout is used to prevent the current page from being scrolled
|
||||
* partially, or completely, out of view when entering Presentation Mode.
|
||||
* NOTE: This issue seems limited to certain zoom levels (e.g. page-width).
|
||||
*
|
||||
* @private
|
||||
*/
|
||||
_setSwitchInProgress() {
|
||||
if (this.switchInProgress) {
|
||||
clearTimeout(this.switchInProgress);
|
||||
}
|
||||
this.switchInProgress = setTimeout(() => {
|
||||
this._removeFullscreenChangeListeners();
|
||||
delete this.switchInProgress;
|
||||
this._notifyStateChange();
|
||||
}, DELAY_BEFORE_RESETTING_SWITCH_IN_PROGRESS);
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_resetSwitchInProgress() {
|
||||
if (this.switchInProgress) {
|
||||
clearTimeout(this.switchInProgress);
|
||||
delete this.switchInProgress;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_enter() {
|
||||
this.active = true;
|
||||
this._resetSwitchInProgress();
|
||||
this._notifyStateChange();
|
||||
this.container.classList.add(ACTIVE_SELECTOR);
|
||||
|
||||
// Ensure that the correct page is scrolled into view when entering
|
||||
// Presentation Mode, by waiting until fullscreen mode in enabled.
|
||||
setTimeout(() => {
|
||||
this.pdfViewer.currentPageNumber = this.args.page;
|
||||
this.pdfViewer.currentScaleValue = 'page-fit';
|
||||
}, 0);
|
||||
|
||||
this._addWindowListeners();
|
||||
this._showControls();
|
||||
this.contextMenuOpen = false;
|
||||
this.container.setAttribute('contextmenu', 'viewerContextMenu');
|
||||
|
||||
// Text selection is disabled in Presentation Mode, thus it's not possible
|
||||
// for the user to deselect text that is selected (e.g. with "Select all")
|
||||
// when entering Presentation Mode, hence we remove any active selection.
|
||||
window.getSelection().removeAllRanges();
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_exit() {
|
||||
var page = this.pdfViewer.currentPageNumber;
|
||||
this.container.classList.remove(ACTIVE_SELECTOR);
|
||||
|
||||
// Ensure that the correct page is scrolled into view when exiting
|
||||
// Presentation Mode, by waiting until fullscreen mode is disabled.
|
||||
setTimeout(() => {
|
||||
this.active = false;
|
||||
this._removeFullscreenChangeListeners();
|
||||
this._notifyStateChange();
|
||||
|
||||
this.pdfViewer.currentScaleValue = this.args.previousScale;
|
||||
this.pdfViewer.currentPageNumber = page;
|
||||
this.args = null;
|
||||
}, 0);
|
||||
|
||||
this._removeWindowListeners();
|
||||
this._hideControls();
|
||||
this._resetMouseScrollState();
|
||||
this.container.removeAttribute('contextmenu');
|
||||
this.contextMenuOpen = false;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_mouseDown(evt) {
|
||||
if (this.contextMenuOpen) {
|
||||
this.contextMenuOpen = false;
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_mouseDown: function PDFPresentationMode_mouseDown(evt) {
|
||||
if (this.contextMenuOpen) {
|
||||
this.contextMenuOpen = false;
|
||||
evt.preventDefault();
|
||||
return;
|
||||
}
|
||||
if (evt.button === 0) {
|
||||
// Enable clicking of links in presentation mode. Note: only links
|
||||
// pointing to destinations in the current PDF document work.
|
||||
var isInternalLink = (evt.target.href &&
|
||||
evt.target.classList.contains('internalLink'));
|
||||
if (!isInternalLink) {
|
||||
// Unless an internal link was clicked, advance one page.
|
||||
evt.preventDefault();
|
||||
return;
|
||||
this.pdfViewer.currentPageNumber += (evt.shiftKey ? -1 : 1);
|
||||
}
|
||||
if (evt.button === 0) {
|
||||
// Enable clicking of links in presentation mode. Please note:
|
||||
// Only links pointing to destinations in the current PDF document work.
|
||||
var isInternalLink = (evt.target.href &&
|
||||
evt.target.classList.contains('internalLink'));
|
||||
if (!isInternalLink) {
|
||||
// Unless an internal link was clicked, advance one page.
|
||||
evt.preventDefault();
|
||||
this.pdfViewer.currentPageNumber += (evt.shiftKey ? -1 : 1);
|
||||
}
|
||||
}
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_contextMenu: function PDFPresentationMode_contextMenu() {
|
||||
this.contextMenuOpen = true;
|
||||
},
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_contextMenu() {
|
||||
this.contextMenuOpen = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_showControls: function PDFPresentationMode_showControls() {
|
||||
if (this.controlsTimeout) {
|
||||
clearTimeout(this.controlsTimeout);
|
||||
} else {
|
||||
this.container.classList.add(CONTROLS_SELECTOR);
|
||||
}
|
||||
this.controlsTimeout = setTimeout(function showControlsTimeout() {
|
||||
this.container.classList.remove(CONTROLS_SELECTOR);
|
||||
delete this.controlsTimeout;
|
||||
}.bind(this), DELAY_BEFORE_HIDING_CONTROLS);
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_hideControls: function PDFPresentationMode_hideControls() {
|
||||
if (!this.controlsTimeout) {
|
||||
return;
|
||||
}
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_showControls() {
|
||||
if (this.controlsTimeout) {
|
||||
clearTimeout(this.controlsTimeout);
|
||||
} else {
|
||||
this.container.classList.add(CONTROLS_SELECTOR);
|
||||
}
|
||||
this.controlsTimeout = setTimeout(() => {
|
||||
this.container.classList.remove(CONTROLS_SELECTOR);
|
||||
delete this.controlsTimeout;
|
||||
},
|
||||
}, DELAY_BEFORE_HIDING_CONTROLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* Resets the properties used for tracking mouse scrolling events.
|
||||
* @private
|
||||
*/
|
||||
_resetMouseScrollState:
|
||||
function PDFPresentationMode_resetMouseScrollState() {
|
||||
this.mouseScrollTimeStamp = 0;
|
||||
this.mouseScrollDelta = 0;
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_touchSwipe: function PDFPresentationMode_touchSwipe(evt) {
|
||||
if (!this.active) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Must move at least these many CSS pixels for it to count as a swipe
|
||||
var SWIPE_MIN_DISTANCE_THRESHOLD = 50;
|
||||
// The swipe angle is allowed to deviate from the x or y axis by this much
|
||||
// before it is not considered a swipe in that direction any more.
|
||||
var SWIPE_ANGLE_THRESHOLD = Math.PI / 6;
|
||||
|
||||
if (evt.touches.length > 1) {
|
||||
// Multiple touch points detected, cancel the swipe.
|
||||
this.touchSwipeState = null;
|
||||
return;
|
||||
}
|
||||
switch (evt.type) {
|
||||
case 'touchstart':
|
||||
this.touchSwipeState = {
|
||||
startX: evt.touches[0].pageX,
|
||||
startY: evt.touches[0].pageY,
|
||||
endX: evt.touches[0].pageX,
|
||||
endY: evt.touches[0].pageY
|
||||
};
|
||||
break;
|
||||
case 'touchmove':
|
||||
if (this.touchSwipeState === null) {
|
||||
return;
|
||||
}
|
||||
this.touchSwipeState.endX = evt.touches[0].pageX;
|
||||
this.touchSwipeState.endY = evt.touches[0].pageY;
|
||||
// Do a preventDefault to avoid the swipe from triggering browser
|
||||
// gestures (Chrome in particular has some sort of swipe gesture in
|
||||
// fullscreen mode).
|
||||
evt.preventDefault();
|
||||
break;
|
||||
case 'touchend':
|
||||
if (this.touchSwipeState === null) {
|
||||
return;
|
||||
}
|
||||
var delta = 0;
|
||||
var dx = this.touchSwipeState.endX - this.touchSwipeState.startX;
|
||||
var dy = this.touchSwipeState.endY - this.touchSwipeState.startY;
|
||||
var absAngle = Math.abs(Math.atan2(dy, dx));
|
||||
if (Math.abs(dx) > SWIPE_MIN_DISTANCE_THRESHOLD &&
|
||||
(absAngle <= SWIPE_ANGLE_THRESHOLD ||
|
||||
absAngle >= (Math.PI - SWIPE_ANGLE_THRESHOLD))) {
|
||||
// horizontal swipe
|
||||
delta = dx;
|
||||
} else if (Math.abs(dy) > SWIPE_MIN_DISTANCE_THRESHOLD &&
|
||||
Math.abs(absAngle - (Math.PI / 2)) <= SWIPE_ANGLE_THRESHOLD) {
|
||||
// vertical swipe
|
||||
delta = dy;
|
||||
}
|
||||
if (delta > 0) {
|
||||
this._goToPreviousPage();
|
||||
} else if (delta < 0) {
|
||||
this._goToNextPage();
|
||||
}
|
||||
break;
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_addWindowListeners: function PDFPresentationMode_addWindowListeners() {
|
||||
this.showControlsBind = this._showControls.bind(this);
|
||||
this.mouseDownBind = this._mouseDown.bind(this);
|
||||
this.mouseWheelBind = this._mouseWheel.bind(this);
|
||||
this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);
|
||||
this.contextMenuBind = this._contextMenu.bind(this);
|
||||
this.touchSwipeBind = this._touchSwipe.bind(this);
|
||||
|
||||
window.addEventListener('mousemove', this.showControlsBind);
|
||||
window.addEventListener('mousedown', this.mouseDownBind);
|
||||
window.addEventListener('wheel', this.mouseWheelBind);
|
||||
window.addEventListener('keydown', this.resetMouseScrollStateBind);
|
||||
window.addEventListener('contextmenu', this.contextMenuBind);
|
||||
window.addEventListener('touchstart', this.touchSwipeBind);
|
||||
window.addEventListener('touchmove', this.touchSwipeBind);
|
||||
window.addEventListener('touchend', this.touchSwipeBind);
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_removeWindowListeners:
|
||||
function PDFPresentationMode_removeWindowListeners() {
|
||||
window.removeEventListener('mousemove', this.showControlsBind);
|
||||
window.removeEventListener('mousedown', this.mouseDownBind);
|
||||
window.removeEventListener('wheel', this.mouseWheelBind);
|
||||
window.removeEventListener('keydown', this.resetMouseScrollStateBind);
|
||||
window.removeEventListener('contextmenu', this.contextMenuBind);
|
||||
window.removeEventListener('touchstart', this.touchSwipeBind);
|
||||
window.removeEventListener('touchmove', this.touchSwipeBind);
|
||||
window.removeEventListener('touchend', this.touchSwipeBind);
|
||||
|
||||
delete this.showControlsBind;
|
||||
delete this.mouseDownBind;
|
||||
delete this.mouseWheelBind;
|
||||
delete this.resetMouseScrollStateBind;
|
||||
delete this.contextMenuBind;
|
||||
delete this.touchSwipeBind;
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_fullscreenChange: function PDFPresentationMode_fullscreenChange() {
|
||||
if (this.isFullscreen) {
|
||||
this._enter();
|
||||
} else {
|
||||
this._exit();
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_addFullscreenChangeListeners:
|
||||
function PDFPresentationMode_addFullscreenChangeListeners() {
|
||||
this.fullscreenChangeBind = this._fullscreenChange.bind(this);
|
||||
|
||||
window.addEventListener('fullscreenchange', this.fullscreenChangeBind);
|
||||
window.addEventListener('mozfullscreenchange', this.fullscreenChangeBind);
|
||||
if (typeof PDFJSDev === 'undefined' ||
|
||||
!PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
|
||||
window.addEventListener('webkitfullscreenchange',
|
||||
this.fullscreenChangeBind);
|
||||
window.addEventListener('MSFullscreenChange',
|
||||
this.fullscreenChangeBind);
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_removeFullscreenChangeListeners:
|
||||
function PDFPresentationMode_removeFullscreenChangeListeners() {
|
||||
window.removeEventListener('fullscreenchange', this.fullscreenChangeBind);
|
||||
window.removeEventListener('mozfullscreenchange',
|
||||
this.fullscreenChangeBind);
|
||||
if (typeof PDFJSDev === 'undefined' ||
|
||||
!PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
|
||||
window.removeEventListener('webkitfullscreenchange',
|
||||
this.fullscreenChangeBind);
|
||||
window.removeEventListener('MSFullscreenChange',
|
||||
this.fullscreenChangeBind);
|
||||
}
|
||||
|
||||
delete this.fullscreenChangeBind;
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_hideControls() {
|
||||
if (!this.controlsTimeout) {
|
||||
return;
|
||||
}
|
||||
};
|
||||
clearTimeout(this.controlsTimeout);
|
||||
this.container.classList.remove(CONTROLS_SELECTOR);
|
||||
delete this.controlsTimeout;
|
||||
}
|
||||
|
||||
return PDFPresentationMode;
|
||||
})();
|
||||
/**
|
||||
* Resets the properties used for tracking mouse scrolling events.
|
||||
*
|
||||
* @private
|
||||
*/
|
||||
_resetMouseScrollState() {
|
||||
this.mouseScrollTimeStamp = 0;
|
||||
this.mouseScrollDelta = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_touchSwipe(evt) {
|
||||
if (!this.active) {
|
||||
return;
|
||||
}
|
||||
if (evt.touches.length > 1) {
|
||||
// Multiple touch points detected; cancel the swipe.
|
||||
this.touchSwipeState = null;
|
||||
return;
|
||||
}
|
||||
|
||||
switch (evt.type) {
|
||||
case 'touchstart':
|
||||
this.touchSwipeState = {
|
||||
startX: evt.touches[0].pageX,
|
||||
startY: evt.touches[0].pageY,
|
||||
endX: evt.touches[0].pageX,
|
||||
endY: evt.touches[0].pageY,
|
||||
};
|
||||
break;
|
||||
case 'touchmove':
|
||||
if (this.touchSwipeState === null) {
|
||||
return;
|
||||
}
|
||||
this.touchSwipeState.endX = evt.touches[0].pageX;
|
||||
this.touchSwipeState.endY = evt.touches[0].pageY;
|
||||
// Avoid the swipe from triggering browser gestures (Chrome in
|
||||
// particular has some sort of swipe gesture in fullscreen mode).
|
||||
evt.preventDefault();
|
||||
break;
|
||||
case 'touchend':
|
||||
if (this.touchSwipeState === null) {
|
||||
return;
|
||||
}
|
||||
var delta = 0;
|
||||
var dx = this.touchSwipeState.endX - this.touchSwipeState.startX;
|
||||
var dy = this.touchSwipeState.endY - this.touchSwipeState.startY;
|
||||
var absAngle = Math.abs(Math.atan2(dy, dx));
|
||||
if (Math.abs(dx) > SWIPE_MIN_DISTANCE_THRESHOLD &&
|
||||
(absAngle <= SWIPE_ANGLE_THRESHOLD ||
|
||||
absAngle >= (Math.PI - SWIPE_ANGLE_THRESHOLD))) {
|
||||
// Horizontal swipe.
|
||||
delta = dx;
|
||||
} else if (Math.abs(dy) > SWIPE_MIN_DISTANCE_THRESHOLD &&
|
||||
Math.abs(absAngle - (Math.PI / 2)) <= SWIPE_ANGLE_THRESHOLD) {
|
||||
// Vertical swipe.
|
||||
delta = dy;
|
||||
}
|
||||
if (delta > 0) {
|
||||
this._goToPreviousPage();
|
||||
} else if (delta < 0) {
|
||||
this._goToNextPage();
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_addWindowListeners() {
|
||||
this.showControlsBind = this._showControls.bind(this);
|
||||
this.mouseDownBind = this._mouseDown.bind(this);
|
||||
this.mouseWheelBind = this._mouseWheel.bind(this);
|
||||
this.resetMouseScrollStateBind = this._resetMouseScrollState.bind(this);
|
||||
this.contextMenuBind = this._contextMenu.bind(this);
|
||||
this.touchSwipeBind = this._touchSwipe.bind(this);
|
||||
|
||||
window.addEventListener('mousemove', this.showControlsBind);
|
||||
window.addEventListener('mousedown', this.mouseDownBind);
|
||||
window.addEventListener('wheel', this.mouseWheelBind);
|
||||
window.addEventListener('keydown', this.resetMouseScrollStateBind);
|
||||
window.addEventListener('contextmenu', this.contextMenuBind);
|
||||
window.addEventListener('touchstart', this.touchSwipeBind);
|
||||
window.addEventListener('touchmove', this.touchSwipeBind);
|
||||
window.addEventListener('touchend', this.touchSwipeBind);
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_removeWindowListeners() {
|
||||
window.removeEventListener('mousemove', this.showControlsBind);
|
||||
window.removeEventListener('mousedown', this.mouseDownBind);
|
||||
window.removeEventListener('wheel', this.mouseWheelBind);
|
||||
window.removeEventListener('keydown', this.resetMouseScrollStateBind);
|
||||
window.removeEventListener('contextmenu', this.contextMenuBind);
|
||||
window.removeEventListener('touchstart', this.touchSwipeBind);
|
||||
window.removeEventListener('touchmove', this.touchSwipeBind);
|
||||
window.removeEventListener('touchend', this.touchSwipeBind);
|
||||
|
||||
delete this.showControlsBind;
|
||||
delete this.mouseDownBind;
|
||||
delete this.mouseWheelBind;
|
||||
delete this.resetMouseScrollStateBind;
|
||||
delete this.contextMenuBind;
|
||||
delete this.touchSwipeBind;
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_fullscreenChange() {
|
||||
if (this.isFullscreen) {
|
||||
this._enter();
|
||||
} else {
|
||||
this._exit();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_addFullscreenChangeListeners() {
|
||||
this.fullscreenChangeBind = this._fullscreenChange.bind(this);
|
||||
|
||||
window.addEventListener('fullscreenchange', this.fullscreenChangeBind);
|
||||
window.addEventListener('mozfullscreenchange', this.fullscreenChangeBind);
|
||||
if (typeof PDFJSDev === 'undefined' ||
|
||||
!PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
|
||||
window.addEventListener('webkitfullscreenchange',
|
||||
this.fullscreenChangeBind);
|
||||
window.addEventListener('MSFullscreenChange',
|
||||
this.fullscreenChangeBind);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @private
|
||||
*/
|
||||
_removeFullscreenChangeListeners() {
|
||||
window.removeEventListener('fullscreenchange', this.fullscreenChangeBind);
|
||||
window.removeEventListener('mozfullscreenchange',
|
||||
this.fullscreenChangeBind);
|
||||
if (typeof PDFJSDev === 'undefined' ||
|
||||
!PDFJSDev.test('FIREFOX || MOZCENTRAL')) {
|
||||
window.removeEventListener('webkitfullscreenchange',
|
||||
this.fullscreenChangeBind);
|
||||
window.removeEventListener('MSFullscreenChange',
|
||||
this.fullscreenChangeBind);
|
||||
}
|
||||
|
||||
delete this.fullscreenChangeBind;
|
||||
}
|
||||
}
|
||||
|
||||
export {
|
||||
PDFPresentationMode,
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user