Start writing the GTK code for test_shell.

webkit/tools/test_shell/gtk/webwidget_host.cc

 // 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 "webkit/tools/test_shell/webwidget_host.h"
 
+#include <gtk/gtk.h>
+
 #include "base/logging.h"
+#include "base/gfx/platform_canvas_linux.h"
+#include "base/gfx/platform_device_linux.h"
+#include "base/gfx/bitmap_platform_device_linux.h"
+#include "webkit/glue/webinputevent.h"
+#include "webkit/glue/webwidget.h"
 
-WebWidgetHost::WebWidgetHost() {
-  NOTIMPLEMENTED();
+namespace {
+
+// -----------------------------------------------------------------------------
+// Callback functions to proxy to host...
+
+gboolean ConfigureEvent(GtkWidget* widget, GdkEventConfigure* config,
+                        gpointer userdata) {
+  WebWidgetHost* host = (WebWidgetHost* ) userdata;
+  DLOG(INFO) << "  -- Resize " << config->width << " " << config->height;
+  host->Resize(gfx::Size(config->width, config->height));
+  return FALSE;
+}
+
+gboolean ExposeEvent(GtkWidget* widget, GdkEventExpose* expose,
+                     gpointer userdata) {
+  WebWidgetHost* host = (WebWidgetHost* ) userdata;
+  DLOG(INFO) << "  -- Expose";
+  host->Paint();
+  return FALSE;
+}
+
+gboolean DestroyEvent(GtkWidget* widget, GdkEvent* event, gpointer userdata) {
+  WebWidgetHost* host = (WebWidgetHost* ) userdata;
+  DLOG(INFO) << "  -- Destroy";
+  host->WindowDestroyed();
+  return FALSE;
+}
+
+gboolean KeyPressEvent(GtkWidget* widget, GdkEventKey* event,
+                       gpointer userdata) {
+  WebWidgetHost* host = (WebWidgetHost* ) userdata;
+  DLOG(INFO) << "  -- Key press";
+  WebKeyboardEvent wke(event);
+  host->webwidget()->HandleInputEvent(&wke);
+  return FALSE;
+}
+
+gboolean FocusIn(GtkWidget* widget, GdkEventFocus* focus, gpointer userdata) {
+  WebWidgetHost* host = (WebWidgetHost* ) userdata;
+  host->webwidget()->SetFocus(true);
+  return FALSE;
+}
+
+gboolean FocusOut(GtkWidget* widget, GdkEventFocus* focus, gpointer userdata) {
+  WebWidgetHost* host = (WebWidgetHost* ) userdata;
+  host->webwidget()->SetFocus(false);
+  return FALSE;
+}
+
+}  // anonymous namespace
+
+// -----------------------------------------------------------------------------
+
+WebWidgetHost* WebWidgetHost::Create(gfx::WindowHandle box,
+                                     WebWidgetDelegate* delegate) {
+  WebWidgetHost* host = new WebWidgetHost();
+  host->view_ = gtk_drawing_area_new();
+  gtk_widget_add_events(host->view_, GDK_EXPOSURE_MASK |
+                                     GDK_POINTER_MOTION_MASK |
+                                     GDK_BUTTON_PRESS_MASK |
+                                     GDK_BUTTON_RELEASE_MASK |
+                                     GDK_KEY_PRESS_MASK |
+                                     GDK_KEY_RELEASE_MASK);
+  // TODO(agl): set GTK_CAN_FOCUS flag
+  host->webwidget_ = WebWidget::Create(delegate);
+  g_object_set_data(G_OBJECT(host->view_), "webwidgethost", host);
+
+  g_signal_connect(host->view_, "configure-event", G_CALLBACK(ConfigureEvent), host);
+  g_signal_connect(host->view_, "expose-event", G_CALLBACK(ExposeEvent), host);
+  g_signal_connect(host->view_, "destroy-event", G_CALLBACK(DestroyEvent), host);
+  g_signal_connect(host->view_, "key-press-event", G_CALLBACK(KeyPressEvent), host);
+  g_signal_connect(host->view_, "focus-in-event", G_CALLBACK(FocusIn), host);
+  g_signal_connect(host->view_, "focus-out-event", G_CALLBACK(FocusOut), host);
+
+  gtk_box_pack_start(GTK_BOX(box), host->view_, TRUE, TRUE, 0);
+
+  return host;
+}
+
+WebWidgetHost* FromWindow(gfx::WindowHandle view) {
+  const gpointer p = g_object_get_data(G_OBJECT(view), "webwidgethost");
+  return (WebWidgetHost* ) p;
+}
+
+WebWidgetHost::WebWidgetHost()
+    : view_(NULL),
+      webwidget_(NULL),
+      scroll_dx_(0),
+      scroll_dy_(0),
+      track_mouse_leave_(false) {
+  set_painting(false);
 }
 
 WebWidgetHost::~WebWidgetHost() {
-  NOTIMPLEMENTED();
+  webwidget_->Close();
+  webwidget_->Release();
 }
+
+void WebWidgetHost::Resize(const gfx::Size &newsize) {
+  // The pixel buffer backing us is now the wrong size
+  canvas_.reset();
+
+  gtk_widget_set_size_request(GTK_WIDGET(view_), newsize.width(), newsize.height());
+  webwidget_->Resize(gfx::Size(newsize.width(), newsize.height()));
+}
+
+void WebWidgetHost::Paint() {
+  gint width, height;
+  gtk_widget_get_size_request(GTK_WIDGET(view_), &width, &height);
+
+  gfx::Rect client_rect(width, height);
+
+  if (!canvas_.get()) {
+    paint_rect_ = client_rect;
+    canvas_.reset(new gfx::PlatformCanvas(width, height, true));
+    if (!canvas_.get()) {
+      // memory allocation failed, we can't paint.
+      LOG(ERROR) << "Failed to allocate memory for " << width << "x" << height;
+      return;
+    }
+  }
+
+  // This may result in more invalidation
+  webwidget_->Layout();
+
+  // TODO(agl): scrolling code
+
+  // 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());
+
+  // BitBlit to the X server
+  gfx::PlatformDeviceLinux &platdev = canvas_->getTopPlatformDevice();
+  gfx::BitmapPlatformDeviceLinux* const bitdev =
+    static_cast<gfx::BitmapPlatformDeviceLinux* >(&platdev);
+  LOG(INFO) << "Using pixel data at " << (void *) gdk_pixbuf_get_pixels(bitdev->pixbuf());
+  gdk_draw_pixbuf(view_->window, NULL, bitdev->pixbuf(),
+                  0, 0, 0, 0, width, height, GDK_RGB_DITHER_NONE, 0, 0);
+  gdk_pixbuf_save(bitdev->pixbuf(), "output.png", "png", NULL, NULL);
+}
+
+void WebWidgetHost::PaintRect(const gfx::Rect& rect) {
+  set_painting(true);
+  webwidget_->Paint(canvas_.get(), rect);
+  set_painting(false);
+}
+
+// -----------------------------------------------------------------------------
+// This is called when the GTK window is destroyed. In the Windows code this
+// deletes this object. Since it's only test_shell it probably doesn't matter
+// that much.
+// -----------------------------------------------------------------------------
+void WebWidgetHost::WindowDestroyed() {
+  delete this;
+}