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avoid exception in pdf viewer when no visible pages

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This commit is contained in:
Brian Gough 2016-07-13 14:14:51 +01:00
parent d8c11a0824
commit d53fa5de47
1 changed files with 15 additions and 14 deletions
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29
services/web/public/coffee/ide/pdfng/directives/pdfViewer.coffee
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@ -275,20 +275,21 @@ define [
getExtraPages = (visiblePages) ->
extra = []
firstVisiblePage = visiblePages[0].pageNum
firstVisiblePageIdx = firstVisiblePage - 1
len = visiblePages.length
lastVisiblePage = visiblePages[len-1].pageNum
lastVisiblePageIdx = lastVisiblePage - 1
# first page after
if lastVisiblePageIdx + 1 < scope.pages.length
extra.push scope.pages[lastVisiblePageIdx + 1]
# page before
if firstVisiblePageIdx > 0
extra.push scope.pages[firstVisiblePageIdx - 1]
# second page after
if lastVisiblePageIdx + 2 < scope.pages.length
extra.push scope.pages[lastVisiblePageIdx + 2]
if visiblePages.length > 0
firstVisiblePage = visiblePages[0].pageNum
firstVisiblePageIdx = firstVisiblePage - 1
len = visiblePages.length
lastVisiblePage = visiblePages[len-1].pageNum
lastVisiblePageIdx = lastVisiblePage - 1
# first page after
if lastVisiblePageIdx + 1 < scope.pages.length
extra.push scope.pages[lastVisiblePageIdx + 1]
# page before
if firstVisiblePageIdx > 0
extra.push scope.pages[firstVisiblePageIdx - 1]
# second page after
if lastVisiblePageIdx + 2 < scope.pages.length
extra.push scope.pages[lastVisiblePageIdx + 2]
return visiblePages.concat extra
rescaleTimer = null