// 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 "chrome/renderer/render_widget.h" #include "base/gfx/point.h" #include "base/gfx/size.h" #include "base/logging.h" #include "base/message_loop.h" #include "base/scoped_ptr.h" #include "build/build_config.h" #include "chrome/common/render_messages.h" #include "chrome/common/transport_dib.h" #include "chrome/renderer/render_process.h" #include "skia/ext/platform_canvas.h" #include "third_party/WebKit/WebKit/chromium/public/WebScreenInfo.h" #if defined(OS_POSIX) #include "skia/include/SkPixelRef.h" #include "skia/include/SkMallocPixelRef.h" #endif // defined(OS_POSIX) #include "webkit/glue/webtextdirection.h" #include "webkit/glue/webwidget.h" using WebKit::WebInputEvent; using WebKit::WebScreenInfo; RenderWidget::RenderWidget(RenderThreadBase* render_thread, bool activatable) : routing_id_(MSG_ROUTING_NONE), webwidget_(NULL), opener_id_(MSG_ROUTING_NONE), render_thread_(render_thread), host_window_(NULL), current_paint_buf_(NULL), current_scroll_buf_(NULL), next_paint_flags_(0), paint_reply_pending_(false), did_show_(false), is_hidden_(false), needs_repainting_on_restore_(false), has_focus_(false), closing_(false), ime_is_active_(false), ime_control_enable_ime_(true), ime_control_x_(-1), ime_control_y_(-1), ime_control_new_state_(false), ime_control_updated_(false), ime_control_busy_(false), activatable_(activatable) { RenderProcess::current()->AddRefProcess(); DCHECK(render_thread_); } RenderWidget::~RenderWidget() { DCHECK(!webwidget_) << "Leaking our WebWidget!"; if (current_paint_buf_) { RenderProcess::current()->ReleaseTransportDIB(current_paint_buf_); current_paint_buf_ = NULL; } if (current_scroll_buf_) { RenderProcess::current()->ReleaseTransportDIB(current_scroll_buf_); current_scroll_buf_ = NULL; } RenderProcess::current()->ReleaseProcess(); } /*static*/ RenderWidget* RenderWidget::Create(int32 opener_id, RenderThreadBase* render_thread, bool activatable) { DCHECK(opener_id != MSG_ROUTING_NONE); scoped_refptr widget = new RenderWidget(render_thread, activatable); widget->Init(opener_id); // adds reference return widget; } void RenderWidget::Init(int32 opener_id) { DCHECK(!webwidget_); if (opener_id != MSG_ROUTING_NONE) opener_id_ = opener_id; webwidget_ = WebWidget::Create(this); bool result = render_thread_->Send( new ViewHostMsg_CreateWidget(opener_id, activatable_, &routing_id_)); if (result) { render_thread_->AddRoute(routing_id_, this); // Take a reference on behalf of the RenderThread. This will be balanced // when we receive ViewMsg_Close. AddRef(); } else { DCHECK(false); } } // This is used to complete pending inits and non-pending inits. For non- // pending cases, the parent will be the same as the current parent. This // indicates we do not need to reparent or anything. void RenderWidget::CompleteInit(gfx::NativeViewId parent_hwnd) { DCHECK(routing_id_ != MSG_ROUTING_NONE); host_window_ = parent_hwnd; Send(new ViewHostMsg_RenderViewReady(routing_id_)); } IPC_DEFINE_MESSAGE_MAP(RenderWidget) IPC_MESSAGE_HANDLER(ViewMsg_Close, OnClose) IPC_MESSAGE_HANDLER(ViewMsg_CreatingNew_ACK, OnCreatingNewAck) IPC_MESSAGE_HANDLER(ViewMsg_Resize, OnResize) IPC_MESSAGE_HANDLER(ViewMsg_WasHidden, OnWasHidden) IPC_MESSAGE_HANDLER(ViewMsg_WasRestored, OnWasRestored) IPC_MESSAGE_HANDLER(ViewMsg_PaintRect_ACK, OnPaintRectAck) IPC_MESSAGE_HANDLER(ViewMsg_ScrollRect_ACK, OnScrollRectAck) IPC_MESSAGE_HANDLER(ViewMsg_HandleInputEvent, OnHandleInputEvent) IPC_MESSAGE_HANDLER(ViewMsg_MouseCaptureLost, OnMouseCaptureLost) IPC_MESSAGE_HANDLER(ViewMsg_SetFocus, OnSetFocus) IPC_MESSAGE_HANDLER(ViewMsg_ImeSetInputMode, OnImeSetInputMode) IPC_MESSAGE_HANDLER(ViewMsg_ImeSetComposition, OnImeSetComposition) IPC_MESSAGE_HANDLER(ViewMsg_Repaint, OnMsgRepaint) IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection) IPC_MESSAGE_UNHANDLED_ERROR() IPC_END_MESSAGE_MAP() bool RenderWidget::Send(IPC::Message* message) { // Don't send any messages after the browser has told us to close. if (closing_) { delete message; return false; } // If given a messsage without a routing ID, then assign our routing ID. if (message->routing_id() == MSG_ROUTING_NONE) message->set_routing_id(routing_id_); return render_thread_->Send(message); } // Got a response from the browser after the renderer decided to create a new // view. void RenderWidget::OnCreatingNewAck(gfx::NativeViewId parent) { DCHECK(routing_id_ != MSG_ROUTING_NONE); CompleteInit(parent); } void RenderWidget::OnClose() { if (closing_) return; closing_ = true; // Browser correspondence is no longer needed at this point. if (routing_id_ != MSG_ROUTING_NONE) render_thread_->RemoveRoute(routing_id_); // If there is a Send call on the stack, then it could be dangerous to close // now. Post a task that only gets invoked when there are no nested message // loops. MessageLoop::current()->PostNonNestableTask(FROM_HERE, NewRunnableMethod(this, &RenderWidget::Close)); // Balances the AddRef taken when we called AddRoute. Release(); } void RenderWidget::OnResize(const gfx::Size& new_size, const gfx::Rect& resizer_rect) { // During shutdown we can just ignore this message. if (!webwidget_) return; // Remember the rect where the resize corner will be drawn. resizer_rect_ = resizer_rect; // TODO(darin): We should not need to reset this here. is_hidden_ = false; needs_repainting_on_restore_ = false; // We shouldn't be asked to resize to our current size. DCHECK(size_ != new_size); size_ = new_size; // We should not be sent a Resize message if we have not ACK'd the previous DCHECK(!next_paint_is_resize_ack()); // When resizing, we want to wait to paint before ACK'ing the resize. This // ensures that we only resize as fast as we can paint. We only need to send // an ACK if we are resized to a non-empty rect. webwidget_->Resize(new_size); if (!new_size.IsEmpty()) { DCHECK(!paint_rect_.IsEmpty()); // This should have caused an invalidation of the entire view. The damaged // rect could be larger than new_size if we are being made smaller. DCHECK_GE(paint_rect_.width(), new_size.width()); DCHECK_GE(paint_rect_.height(), new_size.height()); // We will send the Resize_ACK flag once we paint again. set_next_paint_is_resize_ack(); } } void RenderWidget::OnWasHidden() { // Go into a mode where we stop generating paint and scrolling events. is_hidden_ = true; } void RenderWidget::OnWasRestored(bool needs_repainting) { // During shutdown we can just ignore this message. if (!webwidget_) return; // See OnWasHidden is_hidden_ = false; if (!needs_repainting && !needs_repainting_on_restore_) return; needs_repainting_on_restore_ = false; // Tag the next paint as a restore ack, which is picked up by DoDeferredPaint // when it sends out the next PaintRect message. set_next_paint_is_restore_ack(); // Generate a full repaint. DidInvalidateRect(webwidget_, gfx::Rect(size_.width(), size_.height())); } void RenderWidget::OnPaintRectAck() { DCHECK(paint_reply_pending()); paint_reply_pending_ = false; // If we sent a PaintRect message with a zero-sized bitmap, then // we should have no current paint buf. if (current_paint_buf_) { RenderProcess::current()->ReleaseTransportDIB(current_paint_buf_); current_paint_buf_ = NULL; } // Continue painting if necessary... DoDeferredPaint(); } void RenderWidget::OnScrollRectAck() { DCHECK(scroll_reply_pending()); if (current_scroll_buf_) { RenderProcess::current()->ReleaseTransportDIB(current_scroll_buf_); current_scroll_buf_ = NULL; } // Continue scrolling if necessary... DoDeferredScroll(); } void RenderWidget::OnHandleInputEvent(const IPC::Message& message) { void* iter = NULL; const char* data; int data_length; if (!message.ReadData(&iter, &data, &data_length)) return; const WebInputEvent* input_event = reinterpret_cast(data); bool processed = false; if (webwidget_) processed = webwidget_->HandleInputEvent(input_event); IPC::Message* response = new ViewHostMsg_HandleInputEvent_ACK(routing_id_); response->WriteInt(input_event->type); response->WriteBool(processed); Send(response); } void RenderWidget::OnMouseCaptureLost() { if (webwidget_) webwidget_->MouseCaptureLost(); } void RenderWidget::OnSetFocus(bool enable) { has_focus_ = enable; if (webwidget_) webwidget_->SetFocus(enable); if (enable) { // Force to retrieve the state of the focused widget to determine if we // should activate IMEs next time when this process calls the UpdateIME() // function. ime_control_updated_ = true; ime_control_new_state_ = true; } } void RenderWidget::ClearFocus() { // We may have got the focus from the browser before this gets processed, in // which case we do not want to unfocus ourself. if (!has_focus_ && webwidget_) webwidget_->SetFocus(false); } void RenderWidget::PaintRect(const gfx::Rect& rect, skia::PlatformCanvas* canvas) { // Bring the canvas into the coordinate system of the paint rect canvas->translate(static_cast(-rect.x()), static_cast(-rect.y())); webwidget_->Paint(canvas, rect); // Flush to underlying bitmap. TODO(darin): is this needed? canvas->getTopPlatformDevice().accessBitmap(false); // Let the subclass observe this paint operations. DidPaint(); } void RenderWidget::DoDeferredPaint() { if (!webwidget_ || paint_reply_pending() || paint_rect_.IsEmpty()) return; // When we are hidden, we want to suppress painting, but we still need to // mark this DoDeferredPaint as complete. if (is_hidden_ || size_.IsEmpty()) { paint_rect_ = gfx::Rect(); needs_repainting_on_restore_ = true; return; } // Layout may generate more invalidation... webwidget_->Layout(); // OK, save the current paint_rect to a local since painting may cause more // invalidation. Some WebCore rendering objects only layout when painted. gfx::Rect damaged_rect = paint_rect_; paint_rect_ = gfx::Rect(); // Compute a buffer for painting and cache it. skia::PlatformCanvas* canvas = RenderProcess::current()->GetDrawingCanvas(¤t_paint_buf_, damaged_rect); if (!canvas) { NOTREACHED(); return; } PaintRect(damaged_rect, canvas); ViewHostMsg_PaintRect_Params params; params.bitmap_rect = damaged_rect; params.view_size = size_; params.plugin_window_moves = plugin_window_moves_; params.flags = next_paint_flags_; params.bitmap = current_paint_buf_->id(); delete canvas; plugin_window_moves_.clear(); paint_reply_pending_ = true; Send(new ViewHostMsg_PaintRect(routing_id_, params)); next_paint_flags_ = 0; UpdateIME(); } void RenderWidget::DoDeferredScroll() { if (!webwidget_ || scroll_reply_pending() || scroll_rect_.IsEmpty()) return; // When we are hidden, we want to suppress scrolling, but we still need to // mark this DoDeferredScroll as complete. if (is_hidden_ || size_.IsEmpty()) { scroll_rect_ = gfx::Rect(); needs_repainting_on_restore_ = true; return; } // Layout may generate more invalidation, so we might have to bail on // optimized scrolling... webwidget_->Layout(); if (scroll_rect_.IsEmpty()) return; gfx::Rect damaged_rect; // Compute the region we will expose by scrolling, and paint that into a // shared memory section. if (scroll_delta_.x()) { int dx = scroll_delta_.x(); damaged_rect.set_y(scroll_rect_.y()); damaged_rect.set_height(scroll_rect_.height()); if (dx > 0) { damaged_rect.set_x(scroll_rect_.x()); damaged_rect.set_width(dx); } else { damaged_rect.set_x(scroll_rect_.right() + dx); damaged_rect.set_width(-dx); } } else { int dy = scroll_delta_.y(); damaged_rect.set_x(scroll_rect_.x()); damaged_rect.set_width(scroll_rect_.width()); if (dy > 0) { damaged_rect.set_y(scroll_rect_.y()); damaged_rect.set_height(dy); } else { damaged_rect.set_y(scroll_rect_.bottom() + dy); damaged_rect.set_height(-dy); } } // In case the scroll offset exceeds the width/height of the scroll rect damaged_rect = scroll_rect_.Intersect(damaged_rect); skia::PlatformCanvas* canvas = RenderProcess::current()->GetDrawingCanvas(¤t_scroll_buf_, damaged_rect); if (!canvas) { NOTREACHED(); return; } // Set these parameters before calling Paint, since that could result in // further invalidates (uncommon). ViewHostMsg_ScrollRect_Params params; params.bitmap_rect = damaged_rect; params.dx = scroll_delta_.x(); params.dy = scroll_delta_.y(); params.clip_rect = scroll_rect_; params.view_size = size_; params.plugin_window_moves = plugin_window_moves_; params.bitmap = current_scroll_buf_->id(); plugin_window_moves_.clear(); // Mark the scroll operation as no longer pending. scroll_rect_ = gfx::Rect(); PaintRect(damaged_rect, canvas); Send(new ViewHostMsg_ScrollRect(routing_id_, params)); delete canvas; UpdateIME(); } /////////////////////////////////////////////////////////////////////////////// // WebWidgetDelegate gfx::NativeViewId RenderWidget::GetContainingView(WebWidget* webwidget) { return host_window_; } void RenderWidget::DidInvalidateRect(WebWidget* webwidget, const gfx::Rect& rect) { // We only want one pending DoDeferredPaint call at any time... bool paint_pending = !paint_rect_.IsEmpty(); // If this invalidate overlaps with a pending scroll, then we have to // downgrade to invalidating the scroll rect. if (rect.Intersects(scroll_rect_)) { paint_rect_ = paint_rect_.Union(scroll_rect_); scroll_rect_ = gfx::Rect(); } gfx::Rect view_rect(0, 0, size_.width(), size_.height()); // TODO(iyengar) Investigate why we have painting issues when // we ignore invalid regions outside the view. // Ignore invalidates that occur outside the bounds of the view // TODO(darin): maybe this should move into the paint code? // paint_rect_ = view_rect.Intersect(paint_rect_.Union(rect)); paint_rect_ = paint_rect_.Union(view_rect.Intersect(rect)); if (paint_rect_.IsEmpty() || paint_reply_pending() || paint_pending) return; // Perform painting asynchronously. This serves two purposes: // 1) Ensures that we call WebView::Paint without a bunch of other junk // on the call stack. // 2) Allows us to collect more damage rects before painting to help coalesce // the work that we will need to do. MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod( this, &RenderWidget::DoDeferredPaint)); } void RenderWidget::DidScrollRect(WebWidget* webwidget, int dx, int dy, const gfx::Rect& clip_rect) { if (dx != 0 && dy != 0) { // We only support scrolling along one axis at a time. DidScrollRect(webwidget, 0, dy, clip_rect); dy = 0; } bool intersects_with_painting = paint_rect_.Intersects(clip_rect); // If we already have a pending scroll operation or if this scroll operation // intersects the existing paint region, then just failover to invalidating. if (!scroll_rect_.IsEmpty() || intersects_with_painting) { if (!intersects_with_painting && scroll_rect_ == clip_rect) { // OK, we can just update the scroll delta (requires same scrolling axis) if (!dx && !scroll_delta_.x()) { scroll_delta_.set_y(scroll_delta_.y() + dy); return; } if (!dy && !scroll_delta_.y()) { scroll_delta_.set_x(scroll_delta_.x() + dx); return; } } DidInvalidateRect(webwidget_, scroll_rect_); DCHECK(scroll_rect_.IsEmpty()); DidInvalidateRect(webwidget_, clip_rect); return; } // We only want one pending DoDeferredScroll call at any time... bool scroll_pending = !scroll_rect_.IsEmpty(); scroll_rect_ = clip_rect; scroll_delta_.SetPoint(dx, dy); if (scroll_pending) return; // Perform scrolling asynchronously since we need to call WebView::Paint MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod( this, &RenderWidget::DoDeferredScroll)); } void RenderWidget::SetCursor(WebWidget* webwidget, const WebCursor& cursor) { // Only send a SetCursor message if we need to make a change. if (!current_cursor_.IsEqual(cursor)) { current_cursor_ = cursor; Send(new ViewHostMsg_SetCursor(routing_id_, cursor)); } } // We are supposed to get a single call to Show for a newly created RenderWidget // that was created via RenderWidget::CreateWebView. So, we wait until this // point to dispatch the ShowWidget message. // // This method provides us with the information about how to display the newly // created RenderWidget (i.e., as a constrained popup or as a new tab). // void RenderWidget::Show(WebWidget* webwidget, WindowOpenDisposition disposition) { DCHECK(!did_show_) << "received extraneous Show call"; DCHECK(routing_id_ != MSG_ROUTING_NONE); DCHECK(opener_id_ != MSG_ROUTING_NONE); if (!did_show_) { did_show_ = true; // NOTE: initial_pos_ may still have its default values at this point, but // that's okay. It'll be ignored if as_popup is false, or the browser // process will impose a default position otherwise. render_thread_->Send(new ViewHostMsg_ShowWidget( opener_id_, routing_id_, initial_pos_)); } } void RenderWidget::ShowWithItems(WebWidget* webwidget, const gfx::Rect& bounds, int item_height, int selected_index, const std::vector& items) { // TODO(paulg): Implement this for Mac HTML select menus in Chromium, bug // number: http://crbug.com/8389 } void RenderWidget::Focus(WebWidget* webwidget) { // Prevent the widget from stealing the focus if it does not have focus // already. We do this by explicitely setting the focus to false again. // We only let the browser focus the renderer. if (!has_focus_ && webwidget_) { MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(this, &RenderWidget::ClearFocus)); } } void RenderWidget::Blur(WebWidget* webwidget) { Send(new ViewHostMsg_Blur(routing_id_)); } void RenderWidget::CloseWidgetSoon(WebWidget* webwidget) { // If a page calls window.close() twice, we'll end up here twice, but that's // OK. It is safe to send multiple Close messages. // Ask the RenderWidgetHost to initiate close. Send(new ViewHostMsg_Close(routing_id_)); } void RenderWidget::Close() { if (webwidget_) { webwidget_->Close(); webwidget_ = NULL; } } void RenderWidget::GetWindowRect(WebWidget* webwidget, gfx::Rect* rect) { Send(new ViewHostMsg_GetWindowRect(routing_id_, host_window_, rect)); } void RenderWidget::SetWindowRect(WebWidget* webwidget, const gfx::Rect& pos) { if (did_show_) { Send(new ViewHostMsg_RequestMove(routing_id_, pos)); } else { initial_pos_ = pos; } } void RenderWidget::GetRootWindowRect(WebWidget* webwidget, gfx::Rect* rect) { Send(new ViewHostMsg_GetRootWindowRect(routing_id_, host_window_, rect)); } void RenderWidget::GetRootWindowResizerRect(WebWidget* webwidget, gfx::Rect* rect) { *rect = resizer_rect_; } void RenderWidget::OnImeSetInputMode(bool is_active) { // To prevent this renderer process from sending unnecessary IPC messages to // a browser process, we permit the renderer process to send IPC messages // only during the IME attached to the browser process is active. ime_is_active_ = is_active; } void RenderWidget::OnImeSetComposition(int string_type, int cursor_position, int target_start, int target_end, const std::wstring& ime_string) { if (webwidget_) { ime_control_busy_ = true; webwidget_->ImeSetComposition(string_type, cursor_position, target_start, target_end, ime_string); ime_control_busy_ = false; } } void RenderWidget::OnMsgRepaint(const gfx::Size& size_to_paint) { // During shutdown we can just ignore this message. if (!webwidget_) return; set_next_paint_is_repaint_ack(); gfx::Rect repaint_rect(size_to_paint.width(), size_to_paint.height()); DidInvalidateRect(webwidget_, repaint_rect); } void RenderWidget::OnSetTextDirection(int direction) { if (!webwidget_) return; WebTextDirection new_direction = static_cast(direction); if (new_direction == WEB_TEXT_DIRECTION_DEFAULT || new_direction == WEB_TEXT_DIRECTION_LTR || new_direction == WEB_TEXT_DIRECTION_RTL) { webwidget_->SetTextDirection(new_direction); } else { NOTREACHED(); } } bool RenderWidget::next_paint_is_resize_ack() const { return ViewHostMsg_PaintRect_Flags::is_resize_ack(next_paint_flags_); } bool RenderWidget::next_paint_is_restore_ack() const { return ViewHostMsg_PaintRect_Flags::is_restore_ack(next_paint_flags_); } void RenderWidget::set_next_paint_is_resize_ack() { next_paint_flags_ |= ViewHostMsg_PaintRect_Flags::IS_RESIZE_ACK; } void RenderWidget::set_next_paint_is_restore_ack() { next_paint_flags_ |= ViewHostMsg_PaintRect_Flags::IS_RESTORE_ACK; } void RenderWidget::set_next_paint_is_repaint_ack() { next_paint_flags_ |= ViewHostMsg_PaintRect_Flags::IS_REPAINT_ACK; } void RenderWidget::UpdateIME() { // If a browser process does not have IMEs, its IMEs are not active, or there // are not any attached widgets. // a renderer process does not have to retrieve information of the focused // control or send notification messages to a browser process. if (!ime_is_active_) { return; } // Retrieve the caret position from the focused widget and verify we should // enabled IMEs attached to the browser process. bool enable_ime = false; gfx::Rect caret_rect; if (!webwidget_ || !webwidget_->ImeUpdateStatus(&enable_ime, &caret_rect)) { // There are not any editable widgets attached to this process. // We should disable the IME to prevent it from sending CJK strings to // non-editable widgets. ime_control_updated_ = true; ime_control_new_state_ = false; } if (ime_control_new_state_ != enable_ime) { ime_control_updated_ = true; ime_control_new_state_ = enable_ime; } if (ime_control_updated_) { // The input focus has been changed. // Compare the current state with the updated state and choose actions. if (ime_control_enable_ime_) { if (ime_control_new_state_) { // Case 1: a text input -> another text input // Complete the current composition and notify the caret position. Send(new ViewHostMsg_ImeUpdateStatus(routing_id(), IME_COMPLETE_COMPOSITION, caret_rect)); } else { // Case 2: a text input -> a password input (or a static control) // Complete the current composition and disable the IME. Send(new ViewHostMsg_ImeUpdateStatus(routing_id(), IME_DISABLE, caret_rect)); } } else { if (ime_control_new_state_) { // Case 3: a password input (or a static control) -> a text input // Enable the IME and notify the caret position. Send(new ViewHostMsg_ImeUpdateStatus(routing_id(), IME_COMPLETE_COMPOSITION, caret_rect)); } else { // Case 4: a password input (or a static contol) -> another password // input (or another static control). // The IME has been already disabled and we don't have to do anything. } } } else { // The input focus is not changed. // Notify the caret position to a browser process only if it is changed. if (ime_control_enable_ime_) { if (caret_rect.x() != ime_control_x_ || caret_rect.y() != ime_control_y_) { Send(new ViewHostMsg_ImeUpdateStatus(routing_id(), IME_MOVE_WINDOWS, caret_rect)); } } } // Save the updated IME status to prevent from sending the same IPC messages. ime_control_updated_ = false; ime_control_enable_ime_ = ime_control_new_state_; ime_control_x_ = caret_rect.x(); ime_control_y_ = caret_rect.y(); } void RenderWidget::DidMove(WebWidget* webwidget, const WebPluginGeometry& move) { size_t i = 0; for (; i < plugin_window_moves_.size(); ++i) { if (plugin_window_moves_[i].window == move.window) { plugin_window_moves_[i] = move; break; } } if (i == plugin_window_moves_.size()) plugin_window_moves_.push_back(move); } WebScreenInfo RenderWidget::GetScreenInfo(WebWidget* webwidget) { WebScreenInfo results; RenderThread::current()->Send( new ViewHostMsg_GetScreenInfo(host_window_, &results)); return results; }