bool LinuxEnvironment::requestSelectionContent(UString &selection_content, Atom selection, Atom requested_format)
{
// send a SelectionRequest to the window owning the selection and waits for its answer (with a timeout)
// the selection owner will be asked to set the MCENGINE_SEL property on m_window with the selection content
Atom property_name = XInternAtom(m_display, "MCENGINE_SEL", false);
XConvertSelection(m_display, selection, requested_format, property_name, m_window, CurrentTime);
bool gotReply = false;
int timeoutMs = 200; // will wait at most for 200 ms
do
{
XEvent event;
gotReply = XCheckTypedWindowEvent(m_display, m_window, SelectionNotify, &event);
if (gotReply)
{
if (event.xselection.property == property_name)
{
selection_content = readWindowProperty(event.xselection.requestor, event.xselection.property, requested_format, true);
return true;
}
else // the format we asked for was denied.. (event.xselection.property == None)
return false;
}
// not very elegant.. we could do a select() or something like that... however clipboard content requesting
// is inherently slow on x11, it often takes 50ms or more so...
usleep(4000);
timeoutMs -= 4;
}
while (timeoutMs > 0);
debugLog("LinuxEnvironment::requestSelectionContent() : Timeout!\n");
return false;
}
/*
==============================================================================
This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-11 by Raw Material Software Ltd.
------------------------------------------------------------------------------
JUCE can be redistributed and/or modified under the terms of the GNU General
Public License (Version 2), as published by the Free Software Foundation.
A copy of the license is included in the JUCE distribution, or can be found
online at www.gnu.org/licenses.
JUCE 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.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.rawmaterialsoftware.com/juce for more information.
==============================================================================
*/
extern Display* display;
extern Window juce_messageWindowHandle;
namespace ClipboardHelpers
{
static String localClipboardContent;
static Atom atom_UTF8_STRING;
static Atom atom_CLIPBOARD;
static Atom atom_TARGETS;
//==============================================================================
static void initSelectionAtoms()
{
static bool isInitialised = false;
if (! isInitialised)
{
atom_UTF8_STRING = XInternAtom (display, "UTF8_STRING", False);
atom_CLIPBOARD = XInternAtom (display, "CLIPBOARD", False);
atom_TARGETS = XInternAtom (display, "TARGETS", False);
}
}
//==============================================================================
// Read the content of a window property as either a locale-dependent string or an utf8 string
// works only for strings shorter than 1000000 bytes
static String readWindowProperty (Window window, Atom prop, Atom fmt)
{
String returnData;
char* clipData;
Atom actualType;
int actualFormat;
unsigned long numItems, bytesLeft;
if (XGetWindowProperty (display, window, prop,
0L /* offset */, 1000000 /* length (max) */, False,
AnyPropertyType /* format */,
&actualType, &actualFormat, &numItems, &bytesLeft,
(unsigned char**) &clipData) == Success)
{
if (actualType == atom_UTF8_STRING && actualFormat == 8)
returnData = String::fromUTF8 (clipData, numItems);
else if (actualType == XA_STRING && actualFormat == 8)
returnData = String (clipData, numItems);
if (clipData != nullptr)
XFree (clipData);
jassert (bytesLeft == 0 || numItems == 1000000);
}
XDeleteProperty (display, window, prop);
return returnData;
}
//==============================================================================
// Send a SelectionRequest to the window owning the selection and waits for its answer (with a timeout) */
static bool requestSelectionContent (String& selectionContent, Atom selection, Atom requestedFormat)
{
Atom property_name = XInternAtom (display, "JUCE_SEL", false);
// The selection owner will be asked to set the JUCE_SEL property on the
// juce_messageWindowHandle with the selection content
XConvertSelection (display, selection, requestedFormat, property_name,
juce_messageWindowHandle, CurrentTime);
int count = 50; // will wait at most for 200 ms
while (--count >= 0)
{
XEvent event;
if (XCheckTypedWindowEvent (display, juce_messageWindowHandle, SelectionNotify, &event))
{
if (event.xselection.property == property_name)
{
jassert (event.xselection.requestor == juce_messageWindowHandle);
selectionContent = readWindowProperty (event.xselection.requestor,
event.xselection.property,
requestedFormat);
return true;
}
else
{
return false; // the format we asked for was denied.. (event.xselection.property == None)
}
}
// not very elegant.. we could do a select() or something like that...
// however clipboard content requesting is inherently slow on x11, it
// often takes 50ms or more so...
Thread::sleep (4);
}
return false;
}
