mirror of
https://github.com/overleaf/overleaf.git
synced 2024-10-31 21:21:03 -04:00
60 lines
2.2 KiB
CoffeeScript
60 lines
2.2 KiB
CoffeeScript
|
define [
|
||
|
|
], () ->
|
||
|
|
class SafariScrollPatcher
|
||
|
|
constructor: (ide, $scope) ->
|
||
|
|
@isBootstrapped = false
|
||
|
|
@isOverAce = false
|
||
|
|
@pdfDiv = null
|
||
|
|
@aceDiv = null
|
||
|
|
|
||
|
|
$scope.$on "loaded", () =>
|
||
|
|
console.log this
|
||
|
|
if !@isBootstrapped
|
||
|
|
console.log "bootstrapping"
|
||
|
|
|
||
|
|
@isBootstrapped = true;
|
||
|
|
@pdfDiv = document.querySelector ".pdfjs-viewer" # Grab the PDF div.
|
||
|
|
@aceDiv = document.querySelector ".ace_content" # Also the editor.
|
||
|
|
@isOverAce = false # Flag to control if the pointer is over Ace.
|
||
|
|
|
||
|
|
# Start listening to PDF wheel events when the pointer leaves the PDF region.
|
||
|
|
# P.S. This is the problem in a nutshell: although the pointer is elsewhere,
|
||
|
|
# wheel events keep being dispatched to the PDF.
|
||
|
|
@pdfDiv.addEventListener "mouseleave", () =>
|
||
|
|
@pdfDiv.addEventListener "wheel", dispatchToAce
|
||
|
|
|
||
|
|
# Stop listening to wheel events when the pointer enters the PDF region. If
|
||
|
|
# the pointer is over the PDF, native behaviour is adequate.
|
||
|
|
@pdfDiv.addEventListener "mouseenter", () =>
|
||
|
|
@pdfDiv.removeEventListener "wheel", dispatchToAce
|
||
|
|
|
||
|
|
# Set the "pointer over Ace" flag as false, when the mouse leaves its area.
|
||
|
|
@aceDiv.addEventListener "mouseleave", () =>
|
||
|
|
@isOverAce = false
|
||
|
|
|
||
|
|
# Set the "pointer over Ace" flag as true, when the mouse enters its area.
|
||
|
|
@aceDiv.addEventListener "mouseenter", () =>
|
||
|
|
@isOverAce = true
|
||
|
|
|
||
|
|
# Handler for wheel events on the PDF.
|
||
|
|
# If the pointer is over Ace, grab the event, prevent default behaviour
|
||
|
|
# and dispatch it to Ace.
|
||
|
|
dispatchToAce = (e) =>
|
||
|
|
if @isOverAce
|
||
|
|
# If this is logged, the problem just happened: the event arrived
|
||
|
|
# here (the PDF wheel handler), but it should've gone to Ace.
|
||
|
|
console.log "Event was bound to the PDF, dispatching to Ace"
|
||
|
|
|
||
|
|
# Small timeout - if we dispatch immediately, an exception is thrown.
|
||
|
|
window.setTimeout(() =>
|
||
|
|
# Dispatch the exact same event to Ace (this will keep values
|
||
|
|
# values e.g. `wheelDelta` consistent with user interaction).
|
||
|
|
@aceDiv.dispatchEvent e
|
||
|
|
, 5)
|
||
|
|
|
||
|
|
# Avoid scrolling the PDF, as we assume this was intended to the
|
||
|
|
# editor.
|
||
|
|
e.preventDefault()
|
||
|
|
|
||
|
|
|