Added editor highlighting for markdown.

2019-04-06 16:50:42 +02:00
parent 7126e59bc7
commit aee91ef925
4 changed files with 155 additions and 22 deletions
@@ -0,0 +1,108 @@
+# -*- coding: utf-8 -*
+"""novelWriter GUI Document Highlighter
+
+ novelWriter – GUI Document Highlighter
+========================================
+ Syntax highlighting for MarkDown
+
+ File History:
+ Created: 2019-04-06 [0.0.1]
+
+"""
+
+import logging
+import nw
+
+from PyQt5.QtCore import QRegularExpression
+from PyQt5.QtGui  import QColor, QTextCharFormat, QFont, QSyntaxHighlighter
+
+logger = logging.getLogger(__name__)
+
+class GuiDocHighlighter(QSyntaxHighlighter):
+
+    def __init__(self, theDoc):
+        QSyntaxHighlighter.__init__(self, theDoc)
+
+        logger.debug("Initialising DocHighlighter ...")
+        self.mainConf = nw.CONFIG
+        self.theDoc   = theDoc
+
+        self.hStyles = {
+            "header1"   : self._makeFormat((  0,  0,200,255),"bold",20),
+            "header2"   : self._makeFormat((  0,  0,200,255),"bold",18),
+            "header3"   : self._makeFormat((  0,  0,200,255),"bold",16),
+            "header4"   : self._makeFormat((  0,  0,200,255),"bold",14),
+            "bold"      : self._makeFormat((192,150,  0,255),"bold"),
+            "italic"    : self._makeFormat((  0,  0,  0,255),"italic"),
+            "strike"    : self._makeFormat((  0,  0,  0,255),"strike"),
+            "underline" : self._makeFormat((  0,  0,  0,255),"underline"),
+            "dialogue"  : self._makeFormat((  0,150,  0,255)),
+            "hidden"    : self._makeFormat((100,100,100,255)),
+            "keyword"   : self._makeFormat((192,150,  0,255)),
+            "value"     : self._makeFormat((  0,150,  0,255)),
+        }
+
+        self.hRules = [
+            (r"^#{1}[^#].*[^\n]",     0, self.hStyles["header1"]),
+            (r"^#{2}[^#].*[^\n]",     0, self.hStyles["header2"]),
+            (r"^#{3}[^#].*[^\n]",     0, self.hStyles["header3"]),
+            (r"^#{4}[^#].*[^\n]",     0, self.hStyles["header4"]),
+            (r"\*{2}(.+?)\*{2}",      0, self.hStyles["bold"]),
+            (r"\/{2}(.+?)\/{2}",      0, self.hStyles["italic"]),
+            (r"~{2}(.+?)~{2}",        0, self.hStyles["strike"]),
+            (r"_{2}(.+?)_{2}",        0, self.hStyles["underline"]),
+            (r'"(.+?)"',              0, self.hStyles["dialogue"]),
+            (r"«(.+?)»",              0, self.hStyles["dialogue"]),
+            (r"“(.+?)”",              0, self.hStyles["dialogue"]),
+            (r"^(@.+?)\s*:\s*(.+?)$", 1, self.hStyles["keyword"]),
+            (r"^(@.+?)\s*:\s*(.+?)$", 2, self.hStyles["value"]),
+            (r"^%.*$",                0, self.hStyles["hidden"]),
+        ]
+
+        # Build a QRegExp for each pattern
+        self.rules = [(QRegularExpression(a),b,c) for (a,b,c) in self.hRules]
+
+        logger.debug("DocHighlighter initialisation complete")
+
+        return
+
+    def _makeFormat(self, fmtCol=None, fmtStyle=None, fmtSize=None):
+        theFormat = QTextCharFormat()
+
+        if fmtCol is not None:
+            theCol = QColor()
+            if isinstance(fmtCol,str):
+                theCol.setNamedColor(fmtCol)
+            else:
+                theCol.setRgb(*fmtCol)
+            theFormat.setForeground(theCol)
+
+        if fmtStyle is not None:
+            if "bold" in fmtStyle:
+                theFormat.setFontWeight(QFont.Bold)
+            if "italic" in fmtStyle:
+                theFormat.setFontItalic(True)
+            if "strike" in fmtStyle:
+                theFormat.setFontStrikeOut(True)
+            if "underline" in fmtStyle:
+                theFormat.setFontUnderline(True)
+
+        if isinstance(fmtSize,int):
+            theFormat.setFontPointSize(fmtSize)
+
+        return theFormat
+
+    def highlightBlock(self, theText):
+        for rX, nth, fmt in self.rules:
+            rxItt = rX.globalMatch(theText, 0)
+            while rxItt.hasNext():
+                rxMatch = rxItt.next()
+                xPos = rxMatch.capturedStart(nth)
+                xLen = rxMatch.capturedLength(nth)
+                # logger.verbose("Captured[%d]: '%s'" % (nth,rxMatch.captured(nth)))
+                # print(rxMatch.capturedTexts())
+                self.setFormat(xPos, xLen, fmt)
+
+        self.setCurrentBlockState(0)
+
+# END Class DocHighlighter