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| author | ojan@google.com <ojan@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-10-09 21:58:05 +0000 |
|---|---|---|
| committer | ojan@google.com <ojan@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-10-09 21:58:05 +0000 |
| commit | 8a2820a90f85f91c500a9d382f8e8ba870fb621c (patch) | |
| tree | 8d8bd23228cd1e6455e64b0de46e961947459382 /webkit/glue/stacking_order_iterator.cc | |
| parent | 283f76091ad757bdc17c6d9090209eade4211075 (diff) | |
| download | chromium_src-8a2820a90f85f91c500a9d382f8e8ba870fb621c.zip chromium_src-8a2820a90f85f91c500a9d382f8e8ba870fb621c.tar.gz chromium_src-8a2820a90f85f91c500a9d382f8e8ba870fb621c.tar.bz2 | |
Patch by Thatcher Ulrich <tulrich@google.com>.
Implement "iframe shim" behavior for windowed plugins.
In FF and IE on windows, iframes are implemented as native HWNDs.
This has the side effect that iframes display on top of windowed
plugins. This side effect has long been known as a workaround for
allowing HTML elements to appear above plugin content.
BUG=1788
Review URL: http://codereview.chromium.org/7032
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@3137 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'webkit/glue/stacking_order_iterator.cc')
| -rwxr-xr-x | webkit/glue/stacking_order_iterator.cc | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/webkit/glue/stacking_order_iterator.cc b/webkit/glue/stacking_order_iterator.cc new file mode 100755 index 0000000..b726a8a --- /dev/null +++ b/webkit/glue/stacking_order_iterator.cc @@ -0,0 +1,137 @@ +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "config.h" + +#pragma warning(push, 0) +#include "RenderLayer.h" +#include "RenderObject.h" +#pragma warning(pop) +#undef LOG + +#include "webkit/glue/stacking_order_iterator.h" + +// +// RenderLayerIterator +// + +RenderLayerIterator::RenderLayerIterator() { +} + +void RenderLayerIterator::Reset(WebCore::RenderLayer* rl) { + if (rl) { + context_stack_.push_back(Context(rl)); + } +} + +WebCore::RenderLayer* RenderLayerIterator::Next() { + while (context_stack_.size()) { + Context* ctx = &(context_stack_.back()); + if (ctx->HasMoreNeg()) { + context_stack_.push_back(ctx->NextNeg()); + } else if (ctx->HasSelf()) { + // Emit self. + return ctx->NextSelf(); + } else if (ctx->HasMoreOverflow()) { + context_stack_.push_back(ctx->NextOverflow()); + } else if (ctx->HasMorePos()) { + context_stack_.push_back(ctx->NextPos()); + } else { + // Nothing left in this context. Pop. + context_stack_.pop_back(); + } + } + return NULL; +} + +RenderLayerIterator::Context::Context(WebCore::RenderLayer* layer) + : layer_(layer), + next_neg_(0), + next_self_(0), + next_overflow_(0), + next_pos_(0) { + ASSERT(layer_); + layer_->updateZOrderLists(); + layer_->updateOverflowList(); +} + +bool RenderLayerIterator::Context::HasMoreNeg() { + return layer_->negZOrderList() && + next_neg_ < layer_->negZOrderList()->size(); +} + +RenderLayerIterator::Context RenderLayerIterator::Context::NextNeg() { + ASSERT(HasMoreNeg()); + return Context(layer_->negZOrderList()->at(next_neg_++)); +} + +bool RenderLayerIterator::Context::HasSelf() { + return next_self_ < 1; +} + +WebCore::RenderLayer* RenderLayerIterator::Context::NextSelf() { + ASSERT(HasSelf()); + next_self_ = 1; + return layer_; +} + +bool RenderLayerIterator::Context::HasMoreOverflow() { + return layer_->overflowList() && + next_overflow_ >= 0 && + next_overflow_ < layer_->overflowList()->size(); +} + +RenderLayerIterator::Context RenderLayerIterator::Context::NextOverflow() { + ASSERT(HasMoreOverflow()); + return Context(layer_->overflowList()->at(next_overflow_++)); +} + +bool RenderLayerIterator::Context::HasMorePos() { + return layer_->posZOrderList() && + next_pos_ < layer_->posZOrderList()->size(); +} + +RenderLayerIterator::Context RenderLayerIterator::Context::NextPos() { + ASSERT(HasMorePos()); + return Context(layer_->posZOrderList()->at(next_pos_++)); +} + +// +// StackingOrderIterator +// + +StackingOrderIterator::StackingOrderIterator() { + Reset(NULL); +} + +void StackingOrderIterator::Reset(WebCore::RenderLayer* rl) { + layer_iterator_.Reset(rl); + current_object_ = NULL; + current_layer_root_ = NULL; +} + +WebCore::RenderObject* StackingOrderIterator::Next() { + if (current_object_) { + // Get the next object inside the current layer. + current_object_ = current_object_->nextInPreOrder(current_layer_root_); + + // Skip any sub-layers we encounter along the way; they are + // visited (in the correct stacking order) by layer_iterator_. + while (current_object_ && current_object_->hasLayer()) { + current_object_ = current_object_-> + nextInPreOrderAfterChildren(current_layer_root_); + } + } + + if (!current_object_) { + // Start the next layer. + WebCore::RenderLayer* layer = layer_iterator_.Next(); + if (layer) { + current_object_ = layer->renderer(); + current_layer_root_ = current_object_; + } + // No more layers. + } + return current_object_; +} |