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E-book viewer: Use heuristics to try to detect comics encoded as fixed layout EPUBs to ensure they are displayed as intended. Fixes #1667357 [Private bug](https://bugs.launchpad.net/calibre/+bug/1667357)

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Kovid Goyal 2017-02-23 22:42:03 +05:30
parent 775b69d74f
commit 655372f10f
2 changed files with 8 additions and 2 deletions
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src/calibre/ebooks/oeb/display/paged.coffee
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@ -142,6 +142,14 @@ class PagedDisplay
# Check if the current document is a full screen layout like
# cover, if so we treat it specially.
single_screen = (document.body.scrollHeight < window.innerHeight + 75)
has_svg = document.getElementsByTagName('svg').length > 0
only_img = document.getElementsByTagName('img').length == 1 and document.getElementsByTagName('div').length < 3 and document.getElementsByTagName('p').length < 2
if only_img
has_viewport = document.head and document.head.querySelector('meta[name="viewport"]')
if has_viewport
# Has a viewport and only an img, is probably a comic, see for
# example: https://bugs.launchpad.net/bugs/1667357
single_screen = true
this.handle_rtl_body(body_style)
first_layout = true
if not single_screen and this.cols_per_screen > 1
@ -248,8 +256,6 @@ class PagedDisplay
# width 100% are wider than body and lead to a blank page after the
# current page (when cols_per_screen == 1). Similarly img elements
# with height=100% overflow the first column
has_svg = document.getElementsByTagName('svg').length > 0
only_img = document.getElementsByTagName('img').length == 1 and document.getElementsByTagName('div').length < 3 and document.getElementsByTagName('p').length < 2
# We only set full_screen_layout if scrollWidth is in (body_width,
# 2*body_width) as if it is <= body_width scrolling will work
# anyway and if it is >= 2*body_width it can't be a full screen