1 files changed, 109 insertions, 0 deletions

diff --git a/libre/abiword/fix-flickering.patch b/libre/abiword/fix-flickering.patch
new file mode 100644
index 000000000..70dcb154f
--- /dev/null
+++ b/libre/abiword/fix-flickering.patch
@@ -0,0 +1,109 @@
+Description: Fix flickering
+ - in GR_Caret::s_blink_timeout, avoid repeated calls by stopping the
+   timer, it will be restarted when needed,
+ .
+ - in GR_Caret::s_enable, avoid extra unnecessary _blink calls when blink
+   is enabled, as they serve no purpose,
+ .
+ - in XAP_UnixFrameImpl::_fe::expose, use the Cairo clip rectangle
+   instead of the expose event area, thanks to Hubert Figuière in
+   865c1dda7e13deff04573ffc42028b71fee07f9c,
+ .
+ - in XAP_UnixFrameImpl::_fe::expose, do not return FALSE, as other
+   handlers will need to handle the draw event,
+ .
+ - in GR_UnixCairoGraphics::flush, fix excessive draw events;
+   gtk_widget_queue_draw only marks the widget as needing redrawing,
+   which causes a draw event for each call to flush, therefore every
+   caret blink, so use gdk_flush instead,
+Author: James Cameron <quozl@laptop.org>
+Origin: other
+Bug: https://bugzilla.abisource.com/show_bug.cgi?id=13791
+Bug-SugarLabs: https://bugs.sugarlabs.org/ticket/4915
+Bug-Ubuntu: https://pad.lv/1574278
+Last-Update: 2017-09-24
+--- a/src/af/gr/gtk/gr_UnixCairoGraphics.cpp
++++ b/src/af/gr/gtk/gr_UnixCairoGraphics.cpp
+@@ -577,9 +577,7 @@ void GR_UnixCairoGraphics::_endPaint()
+ 
+ void GR_UnixCairoGraphics::flush(void)
+ {
+-	if (m_Widget) {
+-		gtk_widget_queue_draw(m_Widget);
+-	}
++	gdk_flush();
+ }
+ 
+ bool GR_UnixCairoGraphics::queryProperties(GR_Graphics::Properties gp) const
+--- a/src/af/gr/xp/gr_Caret.cpp
++++ b/src/af/gr/xp/gr_Caret.cpp
+@@ -155,22 +155,17 @@ void GR_Caret::s_enable(UT_Worker * _w)
+ {
+ 	GR_Caret * c = static_cast<GR_Caret *>(_w->getInstanceData());
+ 
++	c->m_enabler->stop();
+ 	c->m_worker->stop();
+-	c->_blink(true);
+-	if (!c->m_bCursorIsOn)
+-		c->_blink(true); // blink again
+-	else
+-	{
+-		c->_blink(true); // ?? - MARCM
+-		c->_blink(true);
+-	}
+ 	c->m_worker->start();
+-	c->m_enabler->stop();
++	c->_blink(true);
+ }
+ 
+ void GR_Caret::s_blink_timeout(UT_Worker * _w)
+ {
+ 	GR_Caret * c = static_cast<GR_Caret *>(_w->getInstanceData());
++
++	c->m_blinkTimeout->stop();
+ 	if (c->isEnabled())
+ 		c->disable();
+ }
+--- a/src/af/xap/gtk/xap_UnixFrameImpl.cpp
++++ b/src/af/xap/gtk/xap_UnixFrameImpl.cpp
+@@ -1215,8 +1215,16 @@ gboolean XAP_UnixFrameImpl::_fe::expose(
+ {
+ 	XAP_UnixFrameImpl * pUnixFrameImpl = static_cast<XAP_UnixFrameImpl *>(g_object_get_data(G_OBJECT(w), "user_data"));
+ 	FV_View * pView = static_cast<FV_View *>(pUnixFrameImpl->getFrame()->getCurrentView());
++	double x, y, width, height;
+ #if GTK_CHECK_VERSION(3,0,0)
+-	GdkEventExpose *pExposeEvent = reinterpret_cast<GdkEventExpose *>(gtk_get_current_event());
++	cairo_clip_extents (cr, &x, &y, &width, &height);
++	width -= x;
++	height -= y;
++#else
++	x = pExposeEvent->area.x;
++	y = pExposeEvent->area.y;
++	width = pExposeEvent->area.width;
++	height = pExposeEvent->area.height;
+ #endif
+ /* Jean: commenting out next lines since the zoom update code does draw only
+  * part of what needs to be updated. */
+@@ -1230,16 +1238,17 @@ gboolean XAP_UnixFrameImpl::_fe::expose(
+ 		UT_Rect rClip;
+ 		if (pGr->getPaintCount () > 0)
+ 			return TRUE;
+-		xxx_UT_DEBUGMSG(("Expose area: x %d y %d width %d  height %d \n",pExposeEvent->area.x,pExposeEvent->area.y,pExposeEvent->area.width,pExposeEvent->area.height));
+-		rClip.left = pGr->tlu(pExposeEvent->area.x);
+-		rClip.top = pGr->tlu(pExposeEvent->area.y);
+-		rClip.width = pGr->tlu(pExposeEvent->area.width)+1;
+-		rClip.height = pGr->tlu(pExposeEvent->area.height)+1;
++		rClip.left = pGr->tlu(x);
++		rClip.top = pGr->tlu(y);
+ #if GTK_CHECK_VERSION(3,0,0)
++		rClip.width = pGr->tlu(width);
++		rClip.height = pGr->tlu(height);
+ 		static_cast<GR_CairoGraphics *>(pGr)->setCairo(cr);
+ 		pView->draw(&rClip);
+ 		static_cast<GR_CairoGraphics *>(pGr)->setCairo(NULL);
+ #else
++		rClip.width = pGr->tlu(width)+1;
++		rClip.height = pGr->tlu(height)+1;
+ 		pView->draw(&rClip);
+ #endif
+ 	}