mirror of
https://github.com/kovidgoyal/calibre.git
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79 lines
2.3 KiB
Plaintext
79 lines
2.3 KiB
Plaintext
# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
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from __python__ import bound_methods, hash_literals
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class Hints:
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def __init__(self, view):
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self.view = view
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container = self.container
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container.setAttribute('tabindex', '0')
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container.style.overflow = 'hidden'
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container.addEventListener('keydown', self.on_keydown, {'passive': False})
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container.addEventListener('click', self.container_clicked, {'passive': False})
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@property
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def container(self):
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return document.getElementById('book-hints-overlay')
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@property
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def is_visible(self):
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return self.container.style.display is not 'none'
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def focus(self):
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self.container.focus()
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def hide(self):
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if self.is_visible:
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self.container.style.display = 'none'
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self.send_message('hide')
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def show(self):
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if not self.is_visible:
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self.container.style.display = 'block'
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self.focus()
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self.send_message('show')
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def on_keydown(self, ev):
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ev.preventDefault(), ev.stopPropagation()
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def container_clicked(self, ev):
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ev.stopPropagation(), ev.preventDefault()
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self.hide()
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def send_message(self, type, **kw):
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self.view.iframe_wrapper.send_message('hints', type=type, **kw)
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def handle_message(self, msg):
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if msg.type is 'shown':
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self.hints_map = msg.hints_map
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def is_visible(a):
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if not a.offsetParent:
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return False
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rect = a.getBoundingClientRect()
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return rect.left >= 0 and rect.top >= 0 and rect.left < window.innerWidth and rect.top < window.innerHeight
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def hint_visible_links(link_attr):
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i = 0
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hint_map = {}
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for a in document.body.querySelectorAll(f'a[{link_attr}]'):
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if is_visible(a):
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i += 1
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h = i + ''
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a.setAttribute('calibre-hint-render', i.toString(36))
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a.setAttribute('calibre-hint-value', h)
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hint_map[h] = a.getAttribute(link_attr)
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a.classList.add('calibre-hint-visible')
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return hint_map
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def unhint_links(link_attr):
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for a in document.body.querySelectorAll(f'a[{link_attr}]'):
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a.classList.remove('calibre-hint-visible')
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a.removeAttribute('calibre-hint-render')
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a.removeAttribute('calibre-hint-value')
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