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/*
* Dillo Widget
*
* Copyright 2014 Sebastian Geerken <sgeerken@dillo.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "oofawarewidget.hh"
#include "ooffloatsmgr.hh"
#include "oofposabsmgr.hh"
#include "oofposfixedmgr.hh"
using namespace dw;
using namespace dw::core;
using namespace lout::misc;
namespace dw {
namespace oof {
int OOFAwareWidget::CLASS_ID = -1;
OOFAwareWidget::OOFAwareWidget ()
{
DBG_OBJ_CREATE ("dw::oof::OOFAwareWidget");
registerName ("dw::oof::OOFAwareWidget", &CLASS_ID);
for (int i = 0; i < NUM_OOFM; i++) {
oofContainer[i] = NULL;
outOfFlowMgr[i] = NULL;
}
}
OOFAwareWidget::~OOFAwareWidget ()
{
DBG_OBJ_DELETE ();
}
void OOFAwareWidget::notifySetAsTopLevel()
{
oofContainer[OOFM_FLOATS] = oofContainer[OOFM_ABSOLUTE]
= oofContainer[OOFM_FIXED] = this;
}
bool OOFAwareWidget::isOOFContainer (Widget *widget, int oofmIndex)
{
// TODO The methods isPossibleContainer() and isPossibleContainerParent()
// are only used in few cases. Does not matter currently, however.
switch (oofmIndex) {
case OOFM_FLOATS:
return widget->instanceOf (OOFAwareWidget::CLASS_ID) &&
(// For floats, only some OOF aware widgets are considered as
// containers.
((OOFAwareWidget*)widget)->isPossibleContainer (OOFM_FLOATS) &&
// The second condition: that this block is "out of flow", in a
// wider sense.
(// The toplevel widget is "out of flow", since there is no
// parent, and so no context.
widget->getParent() == NULL ||
// A similar reasoning applies to a widget with an
// unsuitable parent (typical example: a table cell (this
// is also a text block, so possible float container)
// within a table widget, which is not a suitable float
// container parent).
!(widget->getParent()->instanceOf (OOFAwareWidget::CLASS_ID) &&
((OOFAwareWidget*)widget->getParent())
->isPossibleContainerParent (OOFM_FLOATS)) ||
// Inline blocks are containing blocks, too.
widget->getStyle()->display == core::style::DISPLAY_INLINE_BLOCK ||
// Finally, "out of flow" in a narrower sense: floats; absolutely
// and fixedly positioned elements.
testWidgetOutOfFlow (widget)));
case OOFM_ABSOLUTE:
// Only the toplevel widget (as for all) as well as absolutely,
// relatively, and fixedly positioned elements constitute the
// containing block for absolutely positioned elements, but
// neither floats nor other elements like table cells.
//
// (Notice that relative positions are not yet supported, but
// only tested to get the correct containing block. Furthermore,
// it seems that this test would be incorrect for floats.)
//
// We also test whether this widget is a textblock: is this
// necessary? (What about other absolutely widgets containing
// children, like tables? TODO: Check CSS spec.)
return widget->instanceOf (OOFAwareWidget::CLASS_ID) &&
(widget->getParent() == NULL ||
testWidgetAbsolutelyPositioned (widget) ||
testWidgetRelativelyPositioned (widget) ||
testWidgetFixedlyPositioned (widget));
case OOFM_FIXED:
// The single container for fixedly positioned elements is the
// toplevel (canvas; actually the viewport). (The toplevel
// widget should always be a textblock; at least this is the
// case in dillo.)
return widget->getParent() == NULL;
default:
// compiler happiness
lout::misc::assertNotReached ();
return false;
}
}
void OOFAwareWidget::notifySetParent ()
{
// Search for containing blocks.
for (int oofmIndex = 0; oofmIndex < NUM_OOFM; oofmIndex++) {
oofContainer[oofmIndex] = NULL;
for (Widget *widget = this;
widget != NULL && oofContainer[oofmIndex] == NULL;
widget = widget->getParent ())
if (isOOFContainer (widget, oofmIndex)) {
assert (widget->instanceOf (OOFAwareWidget::CLASS_ID));
oofContainer[oofmIndex] = (OOFAwareWidget*)widget;
}
DBG_OBJ_ARRSET_PTR ("containingBlock", oofmIndex,
containingBlock[oofmIndex]);
assert (oofContainer[oofmIndex] != NULL);
}
}
void OOFAwareWidget::initOutOfFlowMgrs ()
{
if (oofContainer[OOFM_FLOATS]->outOfFlowMgr[OOFM_FLOATS] == NULL) {
oofContainer[OOFM_FLOATS]->outOfFlowMgr[OOFM_FLOATS] =
new OOFFloatsMgr (oofContainer[OOFM_FLOATS]);
DBG_OBJ_ASSOC (oofContainer[OOFM_FLOATS],
oofContainer[OOFM_FLOATS]->outOfFlowMgr[OOFM_FLOATS]);
}
if (oofContainer[OOFM_ABSOLUTE]->outOfFlowMgr[OOFM_ABSOLUTE] == NULL) {
oofContainer[OOFM_ABSOLUTE]->outOfFlowMgr[OOFM_ABSOLUTE] =
new OOFPosAbsMgr (oofContainer[OOFM_ABSOLUTE]);
DBG_OBJ_ASSOC (oofContainer[OOFM_ABSOLUTE],
oofContainer[OOFM_ABSOLUTE]->outOfFlowMgr[OOFM_ABSOLUTE]);
}
if (oofContainer[OOFM_FIXED]->outOfFlowMgr[OOFM_FIXED] == NULL) {
oofContainer[OOFM_FIXED]->outOfFlowMgr[OOFM_FIXED] =
new OOFPosFixedMgr (oofContainer[OOFM_FIXED]);
DBG_OBJ_ASSOC (oofContainer[OOFM_FIXED],
oofContainer[OOFM_FIXED]->outOfFlowMgr[OOFM_FIXED]);
}
}
void OOFAwareWidget::sizeAllocateStart (core::Allocation *allocation)
{
for (int i = 0; i < NUM_OOFM; i++)
if (oofContainer[i]->outOfFlowMgr[i])
oofContainer[i]->outOfFlowMgr[i]->sizeAllocateStart (this, allocation);
}
void OOFAwareWidget::sizeAllocateEnd ()
{
for (int i = 0; i < NUM_OOFM; i++)
if (oofContainer[i]->outOfFlowMgr[i])
oofContainer[i]->outOfFlowMgr[i]->sizeAllocateEnd (this);
}
void OOFAwareWidget::borderChanged (int y, Widget *vloat)
{
assertNotReached ();
}
void OOFAwareWidget::oofSizeChanged (bool extremesChanged)
{
DBG_OBJ_ENTER ("resize", 0, "oofSizeChanged", "%s",
extremesChanged ? "true" : "false");
queueResize (-1, extremesChanged);
// Extremes changes may become also relevant for the children.
if (extremesChanged)
containerSizeChanged ();
DBG_OBJ_LEAVE ();
}
int OOFAwareWidget::getLineBreakWidth ()
{
assertNotReached ();
return 0;
}
bool OOFAwareWidget::isPossibleContainer (int oofmIndex)
{
return oofmIndex != OOFM_FLOATS;
}
bool OOFAwareWidget::isPossibleContainerParent (int oofmIndex)
{
return oofmIndex != OOFM_FLOATS;
}
} // namespace oof
} // namespace dw
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