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| # vim: ft=python fileencoding=utf-8 sts=4 sw=4 et: | |
| # Copyright 2014-2017 Florian Bruhin (The Compiler) <[email protected]> | |
| # | |
| # This file is part of qutebrowser. | |
| # | |
| # qutebrowser is free software: you can redistribute it and/or modify | |
| # it under the terms of the GNU General Public License as published by | |
| # the Free Software Foundation, either version 3 of the License, or | |
| # (at your option) any later version. | |
| # | |
| # qutebrowser is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| # GNU General Public License for more details. | |
| # | |
| # You should have received a copy of the GNU General Public License | |
| # along with qutebrowser. If not, see <http://www.gnu.org/licenses/>. | |
| """Completion item delegate for CompletionView. | |
| We use this to be able to highlight parts of the text. | |
| """ | |
| import re | |
| import html | |
| from PyQt5.QtWidgets import QStyle, QStyleOptionViewItem, QStyledItemDelegate | |
| from PyQt5.QtCore import QRectF, QSize, Qt | |
| from PyQt5.QtGui import (QIcon, QPalette, QTextDocument, QTextOption, | |
| QAbstractTextDocumentLayout) | |
| from qutebrowser.config import config | |
| from qutebrowser.utils import qtutils, jinja | |
| class CompletionItemDelegate(QStyledItemDelegate): | |
| """Delegate used by CompletionView to draw individual items. | |
| Mainly a cleaned up port of Qt's way to draw a TreeView item, except it | |
| uses a QTextDocument to draw the text and add marking. | |
| Original implementation: | |
| qt/src/gui/styles/qcommonstyle.cpp:drawControl:2153 | |
| Attributes: | |
| _opt: The QStyleOptionViewItem which is used. | |
| _style: The style to be used. | |
| _painter: The QPainter to be used. | |
| _doc: The QTextDocument to be used. | |
| """ | |
| # FIXME this is horribly slow when resizing. | |
| # We should probably cache something in _get_textdoc or so, but as soon as | |
| # we implement eliding that cache probably isn't worth much anymore... | |
| # https://github.com/qutebrowser/qutebrowser/issues/121 | |
| def __init__(self, parent=None): | |
| self._painter = None | |
| self._opt = None | |
| self._doc = None | |
| self._style = None | |
| stylesheet = """ | |
| .highlight { | |
| color: {{ conf.colors.completion.match.fg }}; | |
| } | |
| """ | |
| with jinja.environment.no_autoescape(): | |
| self._rendered_template = jinja.environment.from_string(stylesheet).render(conf=config.val) | |
| super().__init__(parent) | |
| def _draw_background(self): | |
| """Draw the background of an ItemViewItem.""" | |
| self._style.drawPrimitive(self._style.PE_PanelItemViewItem, self._opt, | |
| self._painter, self._opt.widget) | |
| def _draw_icon(self): | |
| """Draw the icon of an ItemViewItem.""" | |
| icon_rect = self._style.subElementRect( | |
| self._style.SE_ItemViewItemDecoration, self._opt, self._opt.widget) | |
| if not icon_rect.isValid(): | |
| # The rect seems to be wrong in all kind of ways if no icon should | |
| # be displayed. | |
| return | |
| mode = QIcon.Normal | |
| if not self._opt.state & QStyle.State_Enabled: | |
| mode = QIcon.Disabled | |
| elif self._opt.state & QStyle.State_Selected: | |
| mode = QIcon.Selected | |
| state = QIcon.On if self._opt.state & QStyle.State_Open else QIcon.Off | |
| self._opt.icon.paint(self._painter, icon_rect, | |
| self._opt.decorationAlignment, mode, state) | |
| def _draw_text(self, index): | |
| """Draw the text of an ItemViewItem. | |
| This is the main part where we differ from the original implementation | |
| in Qt: We use a QTextDocument to draw text. | |
| Args: | |
| index: The QModelIndex of the item to draw. | |
| """ | |
| if not self._opt.text: | |
| return | |
| text_rect_ = self._style.subElementRect( | |
| self._style.SE_ItemViewItemText, self._opt, self._opt.widget) | |
| qtutils.ensure_valid(text_rect_) | |
| margin = self._style.pixelMetric(QStyle.PM_FocusFrameHMargin, | |
| self._opt, self._opt.widget) + 1 | |
| # remove width padding | |
| text_rect = text_rect_.adjusted(margin, 0, -margin, 0) | |
| qtutils.ensure_valid(text_rect) | |
| # move text upwards a bit | |
| if index.parent().isValid(): | |
| text_rect.adjust(0, -1, 0, -1) | |
| else: | |
| text_rect.adjust(0, -2, 0, -2) | |
| self._painter.save() | |
| state = self._opt.state | |
| if state & QStyle.State_Enabled and state & QStyle.State_Active: | |
| cg = QPalette.Normal | |
| elif state & QStyle.State_Enabled: | |
| cg = QPalette.Inactive | |
| else: | |
| cg = QPalette.Disabled | |
| if state & QStyle.State_Selected: | |
| self._painter.setPen(self._opt.palette.color( | |
| cg, QPalette.HighlightedText)) | |
| # This is a dirty fix for the text jumping by one pixel for | |
| # whatever reason. | |
| text_rect.adjust(0, -1, 0, 0) | |
| else: | |
| self._painter.setPen(self._opt.palette.color(cg, QPalette.Text)) | |
| if state & QStyle.State_Editing: | |
| self._painter.setPen(self._opt.palette.color(cg, QPalette.Text)) | |
| self._painter.drawRect(text_rect_.adjusted(0, 0, -1, -1)) | |
| self._painter.translate(text_rect.left(), text_rect.top()) | |
| self._get_textdoc(index) | |
| self._draw_textdoc(text_rect) | |
| self._painter.restore() | |
| def _draw_textdoc(self, rect): | |
| """Draw the QTextDocument of an item. | |
| Args: | |
| rect: The QRect to clip the drawing to. | |
| """ | |
| # We can't use drawContents because then the color would be ignored. | |
| clip = QRectF(0, 0, rect.width(), rect.height()) | |
| self._painter.save() | |
| if self._opt.state & QStyle.State_Selected: | |
| color = config.val.colors.completion.item.selected.fg | |
| elif not self._opt.state & QStyle.State_Enabled: | |
| color = config.val.colors.completion.category.fg | |
| else: | |
| color = config.val.colors.completion.fg | |
| self._painter.setPen(color) | |
| ctx = QAbstractTextDocumentLayout.PaintContext() | |
| ctx.palette.setColor(QPalette.Text, self._painter.pen().color()) | |
| if clip.isValid(): | |
| self._painter.setClipRect(clip) | |
| ctx.clip = clip | |
| self._doc.documentLayout().draw(self._painter, ctx) | |
| self._painter.restore() | |
| def _get_textdoc(self, index): | |
| """Create the QTextDocument of an item. | |
| Args: | |
| index: The QModelIndex of the item to draw. | |
| """ | |
| # FIXME we probably should do eliding here. See | |
| # qcommonstyle.cpp:viewItemDrawText | |
| # https://github.com/qutebrowser/qutebrowser/issues/118 | |
| text_option = QTextOption() | |
| if self._opt.features & QStyleOptionViewItem.WrapText: | |
| text_option.setWrapMode(QTextOption.WordWrap) | |
| else: | |
| text_option.setWrapMode(QTextOption.ManualWrap) | |
| text_option.setTextDirection(self._opt.direction) | |
| text_option.setAlignment(QStyle.visualAlignment( | |
| self._opt.direction, self._opt.displayAlignment)) | |
| if self._doc is not None: | |
| self._doc.deleteLater() | |
| self._doc = QTextDocument(self) | |
| self._doc.setDefaultFont(self._opt.font) | |
| self._doc.setDefaultTextOption(text_option) | |
| self._doc.setDocumentMargin(2) | |
| self._doc.setDefaultStyleSheet(self._rendered_template) | |
| if index.parent().isValid(): | |
| view = self.parent() | |
| pattern = view.pattern | |
| columns_to_filter = index.model().columns_to_filter(index) | |
| if index.column() in columns_to_filter and pattern: | |
| repl = r'<span class="highlight">\g<0></span>' | |
| text = re.sub(re.escape(pattern).replace(r'\ ', r'|'), | |
| repl, self._opt.text, flags=re.IGNORECASE) | |
| self._doc.setHtml(text) | |
| else: | |
| self._doc.setPlainText(self._opt.text) | |
| else: | |
| self._doc.setHtml( | |
| '<span style="font: {};">{}</span>'.format( | |
| html.escape(config.val.fonts.completion.category), | |
| html.escape(self._opt.text))) | |
| def _draw_focus_rect(self): | |
| """Draw the focus rectangle of an ItemViewItem.""" | |
| state = self._opt.state | |
| if not state & QStyle.State_HasFocus: | |
| return | |
| o = self._opt | |
| o.rect = self._style.subElementRect( | |
| self._style.SE_ItemViewItemFocusRect, self._opt, self._opt.widget) | |
| o.state |= QStyle.State_KeyboardFocusChange | QStyle.State_Item | |
| qtutils.ensure_valid(o.rect) | |
| if state & QStyle.State_Enabled: | |
| cg = QPalette.Normal | |
| else: | |
| cg = QPalette.Disabled | |
| if state & QStyle.State_Selected: | |
| role = QPalette.Highlight | |
| else: | |
| role = QPalette.Window | |
| o.backgroundColor = self._opt.palette.color(cg, role) | |
| self._style.drawPrimitive(QStyle.PE_FrameFocusRect, o, self._painter, | |
| self._opt.widget) | |
| def sizeHint(self, option, index): | |
| """Override sizeHint of QStyledItemDelegate. | |
| Return the cell size based on the QTextDocument size, but might not | |
| work correctly yet. | |
| Args: | |
| option: const QStyleOptionViewItem & option | |
| index: const QModelIndex & index | |
| Return: | |
| A QSize with the recommended size. | |
| """ | |
| value = index.data(Qt.SizeHintRole) | |
| if value is not None: | |
| return value | |
| self._opt = QStyleOptionViewItem(option) | |
| self.initStyleOption(self._opt, index) | |
| self._style = self._opt.widget.style() | |
| self._get_textdoc(index) | |
| docsize = self._doc.size().toSize() | |
| size = self._style.sizeFromContents(QStyle.CT_ItemViewItem, self._opt, | |
| docsize, self._opt.widget) | |
| qtutils.ensure_valid(size) | |
| return size + QSize(10, 3) | |
| def paint(self, painter, option, index): | |
| """Override the QStyledItemDelegate paint function. | |
| Args: | |
| painter: QPainter * painter | |
| option: const QStyleOptionViewItem & option | |
| index: const QModelIndex & index | |
| """ | |
| self._painter = painter | |
| self._painter.save() | |
| self._opt = QStyleOptionViewItem(option) | |
| self.initStyleOption(self._opt, index) | |
| self._style = self._opt.widget.style() | |
| self._draw_background() | |
| self._draw_icon() | |
| self._draw_text(index) | |
| self._draw_focus_rect() | |
| self._painter.restore() |
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