Add test shell WebView and WebWidget host classes. This are stopgaps and

are subject to change as the rest of the rendering and event handling paths
come together.
Review URL: http://codereview.chromium.org/3062

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@2230 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 260 insertions, 0 deletions

diff --git a/webkit/tools/test_shell/mac/webwidget_host.mm b/webkit/tools/test_shell/mac/webwidget_host.mm
new file mode 100644
index 0000000..bf38fc4
--- /dev/null
+++ b/webkit/tools/test_shell/mac/webwidget_host.mm
@@ -0,0 +1,260 @@
+// Copyright (c) 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.
+
+#import <Cocoa/Cocoa.h>
+
+#include "webkit/tools/test_shell/webwidget_host.h"
+
+#include "base/gfx/platform_canvas_mac.h"
+#include "base/gfx/rect.h"
+#include "base/gfx/size.h"
+#include "base/logging.h"
+#include "webkit/glue/webinputevent.h"
+#include "webkit/glue/webwidget.h"
+
+/*static*/
+WebWidgetHost* WebWidgetHost::Create(NSWindow* parent_window,
+                                     WebWidgetDelegate* delegate) {
+  WebWidgetHost* host = new WebWidgetHost();
+
+  NSRect content_rect = [parent_window frame];
+  content_rect.origin.y += 64;
+  content_rect.size.height -= 64;
+  host->view_ = [[NSView alloc] initWithFrame:content_rect];
+  [[parent_window contentView] addSubview:host->view_];
+  
+  // win_util::SetWindowUserData(host->hwnd_, host);
+
+  host->webwidget_ = WebWidget::Create(delegate);
+  host->webwidget_->Resize(gfx::Size(content_rect.size.width,
+                                     content_rect.size.height));
+  return host;
+}
+
+/*static*/
+WebWidgetHost* WebWidgetHost::FromWindow(NSWindow* hwnd) {
+  return NULL;
+}
+
+/*static*/
+void WebWidgetHost::HandleEvent(NSWindow *window, NSEvent *event) {
+  WebWidgetHost* host = FromWindow(window);
+  if (host) {
+    switch ([event type]) {
+      case NSLeftMouseDown:
+      case NSLeftMouseUp:
+      case NSRightMouseDown:
+      case NSRightMouseUp:
+      case NSOtherMouseDown:
+      case NSOtherMouseUp:
+      case NSMouseEntered:
+      case NSMouseExited:
+        host->MouseEvent(event);
+        break;
+
+      case NSScrollWheel:
+        host->WheelEvent(event);
+        break;
+
+      case NSKeyDown:
+      case NSKeyUp:
+        host->KeyEvent(event);
+        break;
+
+      case NSAppKitDefined:
+        switch ([event subtype]) {
+          case NSApplicationActivatedEventType:
+            host->SetFocus(true);
+            break;
+          case NSApplicationDeactivatedEventType:
+            host->SetFocus(false);
+            break;
+        }
+        break;
+    }
+  }
+}
+
+void WebWidgetHost::DidInvalidateRect(const gfx::Rect& damaged_rect) {
+  DLOG_IF(WARNING, painting_) << "unexpected invalidation while painting";
+
+  // If this invalidate overlaps with a pending scroll, then we have to
+  // downgrade to invalidating the scroll rect.
+  if (damaged_rect.Intersects(scroll_rect_)) {
+    paint_rect_ = paint_rect_.Union(scroll_rect_);
+    ResetScrollRect();
+  }
+  paint_rect_ = paint_rect_.Union(damaged_rect);
+
+  NSRect r = NSRectFromCGRect(damaged_rect.ToCGRect());
+  [view_ setNeedsDisplayInRect:r];
+}
+
+void WebWidgetHost::DidScrollRect(int dx, int dy, const gfx::Rect& clip_rect) {
+  DCHECK(dx || dy);
+
+  // 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() || paint_rect_.Intersects(clip_rect)) {
+    paint_rect_ = paint_rect_.Union(scroll_rect_);
+    ResetScrollRect();
+    paint_rect_ = paint_rect_.Union(clip_rect);
+  }
+
+  // We will perform scrolling lazily, when requested to actually paint.
+  scroll_rect_ = clip_rect;
+  scroll_dx_ = dx;
+  scroll_dy_ = dy;
+
+  NSRect r = NSRectFromCGRect(clip_rect.ToCGRect());
+  [view_ setNeedsDisplayInRect:r];
+}
+
+// void WebWidgetHost::SetCursor(HCURSOR cursor) {
+// }
+
+void WebWidgetHost::DiscardBackingStore() {
+  canvas_.reset();
+}
+
+WebWidgetHost::WebWidgetHost()
+    : view_(NULL),
+      webwidget_(NULL),
+      scroll_dx_(0),
+      scroll_dy_(0),
+      track_mouse_leave_(false)
+{
+  set_painting(false);
+}
+
+WebWidgetHost::~WebWidgetHost() {
+  // win_util::SetWindowUserData(hwnd_, 0);
+
+  TrackMouseLeave(false);
+
+  webwidget_->Close();
+  webwidget_->Release();
+}
+
+void WebWidgetHost::Paint() {
+  NSRect r = [view_ frame];
+  gfx::Rect client_rect(NSRectToCGRect(r));
+  NSGraphicsContext* view_context = [NSGraphicsContext currentContext];
+  CGContextRef context = static_cast<CGContextRef>([view_context graphicsPort]);
+
+  // Allocate a canvas if necessary
+  if (!canvas_.get()) {
+    ResetScrollRect();
+    paint_rect_ = client_rect;
+    canvas_.reset(new gfx::PlatformCanvas(
+        paint_rect_.width(), paint_rect_.height(), true));
+  }
+
+  // make sure webkit draws into our bitmap, not the window
+  CGContextRef bitmap_context =
+      canvas_->getTopPlatformDevice().GetBitmapContext();
+  [NSGraphicsContext setCurrentContext:
+      [NSGraphicsContext graphicsContextWithGraphicsPort:bitmap_context
+                                                 flipped:NO]];
+  
+  // This may result in more invalidation
+  webwidget_->Layout();
+  
+  // Scroll the canvas if necessary
+  scroll_rect_ = client_rect.Intersect(scroll_rect_);
+  if (!scroll_rect_.IsEmpty()) {
+    // add to invalidate rect, since there's no equivalent of ScrollDC.
+    paint_rect_.Union(scroll_rect_);
+  }
+  ResetScrollRect();
+
+  // Paint the canvas if necessary.  Allow painting to generate extra rects the
+  // first time we call it.  This is necessary because some WebCore rendering
+  // objects update their layout only when painted.
+  for (int i = 0; i < 2; ++i) {
+    paint_rect_ = client_rect;//.Intersect(paint_rect_);
+    if (!paint_rect_.IsEmpty()) {
+      gfx::Rect rect(paint_rect_);
+      paint_rect_ = gfx::Rect();
+
+//      DLOG_IF(WARNING, i == 1) << "painting caused additional invalidations";
+      PaintRect(rect);
+    }
+  }
+  DCHECK(paint_rect_.IsEmpty());
+  
+  // set the context back to our window
+  [NSGraphicsContext setCurrentContext: view_context];
+
+  // Paint to the screen
+  if ([view_ lockFocusIfCanDraw]) {
+    CGRect paint_rect = NSRectToCGRect(r);
+    int bitmap_height = CGBitmapContextGetHeight(bitmap_context);
+    int bitmap_width = CGBitmapContextGetWidth(bitmap_context);
+    CGRect bitmap_rect = { { 0, 0 },
+                           { bitmap_width, bitmap_height } };
+    canvas_->getTopPlatformDevice().DrawToContext(
+        context, 0, client_rect.height() - bitmap_height, &bitmap_rect);
+    
+    [view_ unlockFocus];
+  }
+
+  // Draw children
+  // UpdateWindow(hwnd_);
+}
+
+void WebWidgetHost::Resize(const gfx::Rect& rect) {
+  // Force an entire re-paint.  TODO(darin): Maybe reuse this memory buffer.
+  DiscardBackingStore();
+  webwidget_->Resize(gfx::Size(rect.width(), rect.height()));
+}
+
+void WebWidgetHost::MouseEvent(NSEvent *event) {
+  WebMouseEvent web_event(event);
+  switch (event.type) {
+    case WebInputEvent::MOUSE_MOVE:
+      TrackMouseLeave(true);
+      break;
+    case WebInputEvent::MOUSE_LEAVE:
+      TrackMouseLeave(false);
+      break;
+    case WebInputEvent::MOUSE_DOWN:
+      break;
+    case WebInputEvent::MOUSE_UP:
+      break;
+  }
+  webwidget_->HandleInputEvent(&web_event);
+}
+
+void WebWidgetHost::WheelEvent(NSEvent *event) {
+  WebMouseWheelEvent web_event(event);
+  webwidget_->HandleInputEvent(&web_event);
+}
+
+void WebWidgetHost::KeyEvent(NSEvent *event) {
+  WebKeyboardEvent web_event(event);
+  webwidget_->HandleInputEvent(&web_event);
+}
+
+void WebWidgetHost::SetFocus(bool enable) {
+  webwidget_->SetFocus(enable);
+}
+
+void WebWidgetHost::TrackMouseLeave(bool track) {
+}
+
+void WebWidgetHost::ResetScrollRect() {
+  scroll_rect_ = gfx::Rect();
+  scroll_dx_ = 0;
+  scroll_dy_ = 0;
+}
+
+void WebWidgetHost::PaintRect(const gfx::Rect& rect) {
+  DCHECK(!painting_);
+  DCHECK(canvas_.get());
+
+  set_painting(true);
+  webwidget_->Paint(canvas_.get(), rect);
+  set_painting(false);
+}