Fixes #17418)

Summary of the issue:
Nvda crashes when selecting whole text in specific source files in Android Studio and IntelliJ Idea

Description of user facing changes
NVDA should no longer crash.

Description of development approach
Java Access Bridge has a buffer limit of 10240 characters for the text. If the text is too large to fit on this buffer size, NVDA will split the calls to take the buffer size in account.

source/JABHandler.py

@@ -647,7 +647,7 @@ def getAccessibleTextSelectionInfo(self):
 		bridgeDll.getAccessibleTextSelectionInfo(self.vmID, self.accContext, byref(textSelectionInfo))
 		return textSelectionInfo
 
-	def getAccessibleTextRange(self, start, end):
+	def _javaGetAccessibleTextRange(self, start, end):
 		length = (end + 1) - start
 		if length <= 0:
 			return ""
@@ -656,6 +656,24 @@ def getAccessibleTextRange(self, start, end):
 		bridgeDll.getAccessibleTextRange(self.vmID, self.accContext, start, end, buf, length)
 		return textUtils.getTextFromRawBytes(buf.raw, numChars=length, encoding=textUtils.WCHAR_ENCODING)
 
+	# Constant gotten from AccessBridgePackages.h,
+	# minus one to accommodate the null character
+	MAX_BUFFER_SIZE = 10239
+
+	def getAccessibleTextRange(self, start, end):
+		length = (end + 1) - start
+		if length <= 0:
+			return ""
+
+		text = []
+		while start <= end:
+			bufferSize = min(self.MAX_BUFFER_SIZE, length)
+			text.append(self._javaGetAccessibleTextRange(start, start + bufferSize - 1))
+			start += bufferSize
+			length = (end + 1) - start
+
+		return "".join(text)
+
 	def getAccessibleTextLineBounds(self, index):
 		index = max(index, 0)
 		log.debug("lineBounds: index %s" % index)

user_docs/en/changes.md

@@ -53,6 +53,7 @@ Prefix matching on command line flags, e.g. using `--di` for `--disable-addons`
 
 ### Bug Fixes
 
+* NVDA will no longer crash when selecting whole text in specific source files in Android Studio or IntelliJ Idea. (#17418, @thgcode)
 * Math reading has been fixed for some web elements.
 Specifically, MathML inside of span and other elements that have the attribute `role="math"`. (#15058)
 * Native support for the Dot Pad tactile graphics device from Dot Inc as a multiline braille display. (#17007)