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#!/usr/bin/env python3
#******************************************************************************
# outputview.py, provides a class for the data output view
#
# TreeLine, an information storage program
# Copyright (C) 2017, Douglas W. Bell
#
# This is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License, either Version 2 or any later
# version. This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY. See the included LICENSE file for details.
#******************************************************************************
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPalette, QTextCursor
from PyQt5.QtWidgets import QTextBrowser, QTextEdit
import treeoutput
import urltools
import dataeditors
import globalref
class OutputView(QTextBrowser):
"""Class override for the data output view.
Sets view defaults and updates the content.
"""
def __init__(self, treeView, isChildView=True, parent=None):
"""Initialize the output view.
Arguments:
treeView - the tree view, needed for the current selection model
isChildView -- shows selected nodes if false, child nodes if true
parent -- the parent main window
"""
super().__init__(parent)
self.treeView = treeView
self.isChildView = isChildView
self.hideChildView = not globalref.genOptions['InitShowChildPane']
self.showDescendants = globalref.genOptions['InitShowDescendants']
self.setFocusPolicy(Qt.NoFocus)
def updateContents(self):
"""Reload the view's content if the view is shown.
Avoids update if view is not visible or has zero height or width.
"""
selSpots = self.treeView.selectionModel().selectedSpots()
if self.isChildView:
if (len(selSpots) > 1 or self.hideChildView or
(selSpots and not selSpots[0].nodeRef.childList)):
self.hide()
return
if not selSpots:
# use top node childList from tree structure
selSpots = [globalref.mainControl.activeControl.structure.
structSpot()]
elif not selSpots:
self.hide()
return
self.show()
if not self.isVisible() or self.height() == 0 or self.width() == 0:
return
if self.isChildView:
if self.showDescendants:
outputGroup = treeoutput.OutputGroup(selSpots, False, True)
if outputGroup.hasPrefixes():
outputGroup.combineAllSiblings()
outputGroup.addBlanksBetween()
outputGroup.addAbsoluteIndents()
else:
outputGroup = treeoutput.OutputGroup(selSpots[0].childSpots())
outputGroup.addBlanksBetween()
outputGroup.addSiblingPrefixes()
else:
outputGroup = treeoutput.OutputGroup(selSpots)
outputGroup.addBlanksBetween()
outputGroup.addSiblingPrefixes()
self.setHtml('\n'.join(outputGroup.getLines()))
self.setSearchPaths([str(globalref.mainControl.defaultPathObj(True))])
def setSource(self, url):
"""Called when a user clicks on a URL link.
Selects an internal link or opens an external browser.
Arguments:
url -- the QUrl that is clicked
"""
name = url.toString()
if name.startswith('#'):
if not self.treeView.selectionModel().selectNodeById(name[1:]):
super().setSource(url)
else:
if urltools.isRelative(name): # check for relative path
defaultPath = globalref.mainControl.defaultPathObj(True)
name = urltools.toAbsolute(name, str(defaultPath))
dataeditors.openExtUrl(name)
def hasSelectedText(self):
"""Return True if text is selected.
"""
return self.textCursor().hasSelection()
def highlightSearch(self, wordList=None, regExpList=None):
"""Highlight any found search terms.
Arguments:
wordList -- list of words to highlight
regExpList -- a list of regular expression objects to highlight
"""
backColor = self.palette().brush(QPalette.Active,
QPalette.Highlight)
foreColor = self.palette().brush(QPalette.Active,
QPalette.HighlightedText)
if wordList is None:
wordList = []
if regExpList is None:
regExpList = []
for regExp in regExpList:
for match in regExp.finditer(self.toPlainText()):
matchText = match.group()
if matchText not in wordList:
wordList.append(matchText)
selections = []
for word in wordList:
while self.find(word):
extraSel = QTextEdit.ExtraSelection()
extraSel.cursor = self.textCursor()
extraSel.format.setBackground(backColor)
extraSel.format.setForeground(foreColor)
selections.append(extraSel)
cursor = QTextCursor(self.document())
self.setTextCursor(cursor) # reset main cursor/selection
self.setExtraSelections(selections)
def contextMenuEvent(self, event):
"""Add a popup menu for select all and copy actions.
Arguments:
event -- the menu event
"""
menu = self.createStandardContextMenu()
menu.removeAction(menu.actions()[1]) #remove copy link location
menu.exec_(event.globalPos())
def resizeEvent(self, event):
"""Update view if was collaped by splitter.
"""
if ((event.oldSize().height() == 0 and event.size().height()) or
(event.oldSize().width() == 0 and event.size().width())):
self.updateContents()
return super().resizeEvent(event)
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