src/views/SkViewInflate.cpp

/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SkViewInflate.h"
#include "SkView.h"
#include <stdio.h>

SkViewInflate::SkViewInflate() : fIDs(kMinIDStrAlloc), fStrings(kMinIDStrAlloc)
{
}

SkViewInflate::~SkViewInflate()
{
}

void SkViewInflate::rInflate(const SkDOM& dom, const SkDOM::Node* node, SkView* parent)
{
	const char* str = dom.findAttr(node, "id");
	if (str)
		fIDs.set(str, parent);

	const SkDOM::Node* child = dom.getFirstChild(node);
	while (child)
	{
		SkView* view = this->createView(dom, child);
		if (view)
		{
			this->rInflate(dom, child, view);
			parent->attachChildToFront(view)->unref();
		}
		else
		{
			const char* name = dom.getName(child);
			const char* target;

			if (!strcmp(name, "listenTo") && (target = dom.findAttr(child, "target")) != NULL)
				this->addIDStr(&fListenTo, parent, target);

			if (!strcmp(name, "broadcastTo") && (target = dom.findAttr(child, "target")) != NULL)
				this->addIDStr(&fBroadcastTo, parent, target);
		}
		child = dom.getNextSibling(child);
	}

	parent->setVisibleP(true);
	this->inflateView(parent, dom, node);
}

void SkViewInflate::inflateView(SkView* view, const SkDOM& dom, const SkDOM::Node* node)
{
	// called after all of view's children have been instantiated.
	// this may be overridden by a subclass, to load in layout or other helpers
	// they should call through to us (INHERITED) before or after their patch
	view->inflate(dom, node);
}

SkView* SkViewInflate::inflate(const SkDOM& dom, const SkDOM::Node* node, SkView* root)
{
	fIDs.reset();

	if (root == NULL)
	{
		root = this->createView(dom, node);
		if (root == NULL)
		{
			printf("createView returned NULL on <%s>\n", dom.getName(node));
			return NULL;
		}
	}
	this->rInflate(dom, node, root);

	// resolve listeners and broadcasters
	{
		SkView*			target;
		const IDStr*	iter = fListenTo.begin();
		const IDStr*	stop = fListenTo.end();
		for (; iter < stop; iter++)
		{
			if (fIDs.find(iter->fStr, &target))
				target->addListenerID(iter->fView->getSinkID());
		}

		iter = fBroadcastTo.begin();
		stop = fBroadcastTo.end();
		for (; iter < stop; iter++)
		{
			if (fIDs.find(iter->fStr, &target))
				iter->fView->addListenerID(target->getSinkID());
		}
	}

	// now that the tree is built, give everyone a shot at the ID dict
	root->postInflate(fIDs);
	return root;
}

SkView* SkViewInflate::inflate(const char xml[], size_t len, SkView* root)
{
	SkDOM				dom;
	const SkDOM::Node*	node = dom.build(xml, len);

	return node ? this->inflate(dom, node, root) : NULL;
}

SkView* SkViewInflate::findViewByID(const char id[]) const
{
	SkASSERT(id);
	SkView* view;
	return fIDs.find(id, &view) ? view : NULL;
}

SkView* SkViewInflate::createView(const SkDOM& dom, const SkDOM::Node* node)
{
	if (!strcmp(dom.getName(node), "view"))
		return new SkView;
	return NULL;
}

void SkViewInflate::addIDStr(SkTDArray<IDStr>* list, SkView* view, const char* str)
{
	size_t len = strlen(str) + 1;
	IDStr* pair = list->append();
	pair->fView = view;
	pair->fStr = (char*)fStrings.alloc(len, SkChunkAlloc::kThrow_AllocFailType);
	memcpy(pair->fStr, str, len);
}

#ifdef SK_DEBUG
void SkViewInflate::dump() const
{
	const IDStr* iter = fListenTo.begin();
	const IDStr* stop = fListenTo.end();
	for (; iter < stop; iter++)
		SkDebugf("inflate: listenTo(\"%s\")\n", iter->fStr);

	iter = fBroadcastTo.begin();
	stop = fBroadcastTo.end();
	for (; iter < stop; iter++)
		SkDebugf("inflate: broadcastFrom(\"%s\")\n", iter->fStr);
}
#endif