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// Copyright 2014 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/browser/ui/views/apps/glass_app_window_frame_view_win.h"
#include "base/win/windows_version.h"
#include "extensions/browser/app_window/native_app_window.h"
#include "ui/base/hit_test.h"
#include "ui/gfx/win/dpi.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_delegate.h"
namespace {
const int kResizeAreaCornerSize = 16;
} // namespace
const char GlassAppWindowFrameViewWin::kViewClassName[] =
"ui/views/apps/GlassAppWindowFrameViewWin";
GlassAppWindowFrameViewWin::GlassAppWindowFrameViewWin(
extensions::NativeAppWindow* window,
views::Widget* widget)
: window_(window), widget_(widget) {
}
GlassAppWindowFrameViewWin::~GlassAppWindowFrameViewWin() {
}
gfx::Insets GlassAppWindowFrameViewWin::GetGlassInsets() const {
int caption_height = gfx::win::GetSystemMetricsInDIP(SM_CYSIZEFRAME) +
gfx::win::GetSystemMetricsInDIP(SM_CYCAPTION);
int frame_size = base::win::GetVersion() < base::win::VERSION_WIN10
? gfx::win::GetSystemMetricsInDIP(SM_CXSIZEFRAME)
: 0;
return gfx::Insets(caption_height, frame_size, frame_size, frame_size);
}
gfx::Insets GlassAppWindowFrameViewWin::GetClientAreaInsets() const {
gfx::Insets insets;
if (base::win::GetVersion() < base::win::VERSION_WIN10) {
// This tells Windows that most of the window is a client area, meaning
// Chrome will draw it. Windows still fills in the glass bits because of the
// DwmExtendFrameIntoClientArea call in |UpdateDWMFrame|.
// Without this 1 pixel offset on the right and bottom:
// * windows paint in a more standard way, and
// * we get weird black bars at the top when maximized in multiple monitor
// configurations.
int border_thickness = 1;
insets.Set(0, 0, border_thickness, border_thickness);
} else {
// On Windows 10 we use a 1 pixel non client border which is too thin as a
// resize target. This inset extends the resize region.
int resize_border = gfx::win::GetSystemMetricsInDIP(SM_CXSIZEFRAME);
insets.Set(0, resize_border, resize_border, resize_border);
}
return insets;
}
gfx::Rect GlassAppWindowFrameViewWin::GetBoundsForClientView() const {
if (widget_->IsFullscreen())
return bounds();
gfx::Insets insets = GetGlassInsets();
return gfx::Rect(insets.left(),
insets.top(),
std::max(0, width() - insets.left() - insets.right()),
std::max(0, height() - insets.top() - insets.bottom()));
}
gfx::Rect GlassAppWindowFrameViewWin::GetWindowBoundsForClientBounds(
const gfx::Rect& client_bounds) const {
if (widget_->IsFullscreen())
return bounds();
gfx::Insets insets = GetGlassInsets();
insets += GetClientAreaInsets();
gfx::Rect window_bounds(
client_bounds.x() - insets.left(), client_bounds.y() - insets.top(),
client_bounds.width() + insets.left() + insets.right(),
client_bounds.height() + insets.top() + insets.bottom());
// Prevent the window size from being 0x0 during initialization.
window_bounds.Union(gfx::Rect(0, 0, 1, 1));
return window_bounds;
}
int GlassAppWindowFrameViewWin::NonClientHitTest(const gfx::Point& point) {
if (widget_->IsFullscreen())
return HTCLIENT;
if (!bounds().Contains(point))
return HTNOWHERE;
// Check the frame first, as we allow a small area overlapping the contents
// to be used for resize handles.
bool can_ever_resize = widget_->widget_delegate()
? widget_->widget_delegate()->CanResize()
: false;
// Don't allow overlapping resize handles when the window is maximized or
// fullscreen, as it can't be resized in those states.
int resize_border = gfx::win::GetSystemMetricsInDIP(SM_CXSIZEFRAME);
int frame_component =
GetHTComponentForFrame(point,
resize_border,
resize_border,
kResizeAreaCornerSize - resize_border,
kResizeAreaCornerSize - resize_border,
can_ever_resize);
if (frame_component != HTNOWHERE)
return frame_component;
int client_component = widget_->client_view()->NonClientHitTest(point);
if (client_component != HTNOWHERE)
return client_component;
// Caption is a safe default.
return HTCAPTION;
}
void GlassAppWindowFrameViewWin::GetWindowMask(const gfx::Size& size,
gfx::Path* window_mask) {
// We got nothing to say about no window mask.
}
gfx::Size GlassAppWindowFrameViewWin::GetPreferredSize() const {
gfx::Size pref = widget_->client_view()->GetPreferredSize();
gfx::Rect bounds(0, 0, pref.width(), pref.height());
return widget_->non_client_view()
->GetWindowBoundsForClientBounds(bounds)
.size();
}
const char* GlassAppWindowFrameViewWin::GetClassName() const {
return kViewClassName;
}
gfx::Size GlassAppWindowFrameViewWin::GetMinimumSize() const {
gfx::Size min_size = widget_->client_view()->GetMinimumSize();
gfx::Insets insets = GetGlassInsets();
min_size.Enlarge(insets.left() + insets.right(),
insets.top() + insets.bottom());
return min_size;
}
gfx::Size GlassAppWindowFrameViewWin::GetMaximumSize() const {
gfx::Size max_size = widget_->client_view()->GetMaximumSize();
gfx::Insets insets = GetGlassInsets();
if (max_size.width())
max_size.Enlarge(insets.left() + insets.right(), 0);
if (max_size.height())
max_size.Enlarge(0, insets.top() + insets.bottom());
return max_size;
}
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