Implement text highlight in epub backend
The UI part is working, but the changes are not permanent,
we need check what html files are modified
and zip again in the epub file.
Gonzalo Odiard
9 years ago
| 64 | 64 | return False |
| 65 | 65 | |
| 66 | 66 | def can_highlight(self): |
| 67 | return False | |
| 67 | return True | |
| 68 | ||
| 69 | def show_highlights(self, page): | |
| 70 | # we save the highlights in the page as html | |
| 71 | pass | |
| 72 | ||
| 73 | def toggle_highlight(self, highlight): | |
| 74 | self._view.set_editable(True) | |
| 75 | ||
| 76 | if highlight: | |
| 77 | self._view.execute_script( | |
| 78 | 'document.execCommand("backColor", false, "yellow");') | |
| 79 | else: | |
| 80 | # need remove the highlight nodes | |
| 81 | js = """ | |
| 82 | var selObj = window.getSelection(); | |
| 83 | var range = selObj.getRangeAt(0); | |
| 84 | var node = range.startContainer; | |
| 85 | while (node.parentNode != null) { | |
| 86 | if (node.localName == "span") { | |
| 87 | if (node.hasAttributes()) { | |
| 88 | var attrs = node.attributes; | |
| 89 | for(var i = attrs.length - 1; i >= 0; i--) { | |
| 90 | if (attrs[i].name == "style" && | |
| 91 | attrs[i].value == "background-color: yellow;") { | |
| 92 | node.removeAttribute("style"); | |
| 93 | break; | |
| 94 | }; | |
| 95 | }; | |
| 96 | }; | |
| 97 | }; | |
| 98 | node = node.parentNode; | |
| 99 | };""" | |
| 100 | self._view.execute_script(js) | |
| 101 | ||
| 102 | self._view.set_editable(False) | |
| 103 | ||
| 104 | def in_highlight(self): | |
| 105 | # Verify if the selection already exist or the cursor | |
| 106 | # is in a highlighted area | |
| 107 | page_title = self._view.get_title() | |
| 108 | js = """ | |
| 109 | var selObj = window.getSelection(); | |
| 110 | var range = selObj.getRangeAt(0); | |
| 111 | var node = range.startContainer; | |
| 112 | var onHighlight = false; | |
| 113 | while (node.parentNode != null) { | |
| 114 | if (node.localName == "span") { | |
| 115 | if (node.hasAttributes()) { | |
| 116 | var attrs = node.attributes; | |
| 117 | for(var i = attrs.length - 1; i >= 0; i--) { | |
| 118 | if (attrs[i].name == "style" && | |
| 119 | attrs[i].value == "background-color: yellow;") { | |
| 120 | onHighlight = true; | |
| 121 | }; | |
| 122 | }; | |
| 123 | }; | |
| 124 | }; | |
| 125 | node = node.parentNode; | |
| 126 | }; | |
| 127 | document.title=onHighlight;""" | |
| 128 | self._view.execute_script(js) | |
| 129 | on_highlight = self._view.get_title() == 'true' | |
| 130 | self._view.execute_script('document.title = "%s";' % page_title) | |
| 131 | # the second parameter is only used in the text backend | |
| 132 | return on_highlight, None | |
| 68 | 133 | |
| 69 | 134 | def can_do_text_to_speech(self): |
| 70 | 135 | return False |