| /* |
| * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ScrollView.h" |
| |
| #include "Chrome.h" |
| #include "ChromeClient.h" |
| #include "FloatRect.h" |
| #include "FocusController.h" |
| #include "Frame.h" |
| #include "FrameView.h" |
| #include "GraphicsContext.h" |
| #include "IntRect.h" |
| #include "NotImplemented.h" |
| #include "Page.h" |
| #include "Scrollbar.h" |
| #include "PlatformMouseEvent.h" |
| #include "PlatformWheelEvent.h" |
| #include "RenderTheme.h" |
| #include "Scrollbar.h" |
| #include "ScrollbarClient.h" |
| #include "ScrollbarTheme.h" |
| #include "Settings.h" |
| #include <algorithm> |
| #include <winsock2.h> |
| #include <windows.h> |
| #include <wtf/Assertions.h> |
| #include <wtf/HashSet.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| class ScrollView::ScrollViewPrivate : public ScrollbarClient { |
| public: |
| ScrollViewPrivate(ScrollView* view) |
| : m_view(view) |
| , m_inUpdateScrollbars(false) |
| , m_panScrollIconPoint(0,0) |
| , m_drawPanScrollIcon(false) |
| { |
| } |
| |
| ~ScrollViewPrivate() |
| { |
| setHasHorizontalScrollbar(false); |
| setHasVerticalScrollbar(false); |
| } |
| |
| void setHasHorizontalScrollbar(bool hasBar); |
| void setHasVerticalScrollbar(bool hasBar); |
| |
| virtual void valueChanged(Scrollbar*); |
| virtual IntRect windowClipRect() const; |
| virtual bool isActive() const; |
| |
| void scrollBackingStore(const IntSize& scrollDelta); |
| |
| |
| ScrollView* m_view; |
| bool m_inUpdateScrollbars; |
| HRGN m_dirtyRegion; |
| IntPoint m_panScrollIconPoint; |
| bool m_drawPanScrollIcon; |
| }; |
| |
| const int panIconSizeLength = 20; |
| |
| void ScrollView::ScrollViewPrivate::setHasHorizontalScrollbar(bool hasBar) |
| { |
| if (hasBar && !m_view->m_horizontalScrollbar) { |
| m_view->m_horizontalScrollbar = Scrollbar::createNativeScrollbar(this, HorizontalScrollbar, RegularScrollbar); |
| m_view->addChild(m_view->m_horizontalScrollbar.get()); |
| } else if (!hasBar && m_view->m_horizontalScrollbar) { |
| m_view->removeChild(m_view->m_horizontalScrollbar.get()); |
| m_view->m_horizontalScrollbar = 0; |
| } |
| } |
| |
| void ScrollView::ScrollViewPrivate::setHasVerticalScrollbar(bool hasBar) |
| { |
| if (hasBar && !m_view->m_verticalScrollbar) { |
| m_view->m_verticalScrollbar = Scrollbar::createNativeScrollbar(this, VerticalScrollbar, RegularScrollbar); |
| m_view->addChild(m_view->m_verticalScrollbar.get()); |
| } else if (!hasBar && m_view->m_verticalScrollbar) { |
| m_view->removeChild(m_view->m_verticalScrollbar.get()); |
| m_view->m_verticalScrollbar = 0; |
| } |
| } |
| |
| void ScrollView::ScrollViewPrivate::valueChanged(Scrollbar* bar) |
| { |
| // Figure out if we really moved. |
| IntSize newOffset = m_view->m_scrollOffset; |
| if (bar) { |
| if (bar == m_view->m_horizontalScrollbar) |
| newOffset.setWidth(bar->value()); |
| else if (bar == m_view->m_verticalScrollbar) |
| newOffset.setHeight(bar->value()); |
| } |
| IntSize scrollDelta = newOffset - m_view->m_scrollOffset; |
| if (scrollDelta == IntSize()) |
| return; |
| m_view->m_scrollOffset = newOffset; |
| |
| if (m_view->scrollbarsSuppressed()) |
| return; |
| |
| static_cast<FrameView*>(m_view)->frame()->sendScrollEvent(); |
| scrollBackingStore(scrollDelta); |
| } |
| |
| void ScrollView::ScrollViewPrivate::scrollBackingStore(const IntSize& scrollDelta) |
| { |
| // Since scrolling is double buffered, we will be blitting the scroll view's intersection |
| // with the clip rect every time to keep it smooth. |
| HWND containingWindowHandle = m_view->containingWindow(); |
| IntRect clipRect = m_view->windowClipRect(); |
| IntRect scrollViewRect = m_view->convertToContainingWindow(IntRect(0, 0, m_view->visibleWidth(), m_view->visibleHeight())); |
| IntRect updateRect = clipRect; |
| updateRect.intersect(scrollViewRect); |
| RECT r = updateRect; |
| ::InvalidateRect(containingWindowHandle, &r, false); |
| |
| if (m_drawPanScrollIcon) { |
| int panIconDirtySquareSizeLength = 2 * (panIconSizeLength + max(abs(scrollDelta.width()), abs(scrollDelta.height()))); // We only want to repaint what's necessary |
| IntPoint panIconDirtySquareLocation = IntPoint(m_panScrollIconPoint.x() - (panIconDirtySquareSizeLength / 2), m_panScrollIconPoint.y() - (panIconDirtySquareSizeLength / 2)); |
| IntRect panScrollIconDirtyRect = IntRect(panIconDirtySquareLocation , IntSize(panIconDirtySquareSizeLength, panIconDirtySquareSizeLength)); |
| |
| m_view->updateWindowRect(panScrollIconDirtyRect); |
| } |
| |
| if (m_view->canBlitOnScroll()) // The main frame can just blit the WebView window |
| // FIXME: Find a way to blit subframes without blitting overlapping content |
| m_view->scrollBackingStore(-scrollDelta.width(), -scrollDelta.height(), scrollViewRect, clipRect); |
| else { |
| // We need to go ahead and repaint the entire backing store. Do it now before moving the |
| // plugins. |
| m_view->addToDirtyRegion(updateRect); |
| m_view->updateBackingStore(); |
| } |
| |
| // This call will move child HWNDs (plugins) and invalidate them as well. |
| m_view->frameRectsChanged(); |
| |
| // Now update the window (which should do nothing but a blit of the backing store's updateRect and so should |
| // be very fast). |
| ::UpdateWindow(containingWindowHandle); |
| } |
| |
| IntRect ScrollView::ScrollViewPrivate::windowClipRect() const |
| { |
| return static_cast<const FrameView*>(m_view)->windowClipRect(false); |
| } |
| |
| bool ScrollView::ScrollViewPrivate::isActive() const |
| { |
| Page* page = static_cast<const FrameView*>(m_view)->frame()->page(); |
| return page && page->focusController()->isActive(); |
| } |
| |
| ScrollView::ScrollView() |
| : m_data(new ScrollViewPrivate(this)) |
| { |
| init(); |
| } |
| |
| ScrollView::~ScrollView() |
| { |
| delete m_data; |
| } |
| |
| void ScrollView::platformAddChild(Widget*) |
| { |
| } |
| |
| void ScrollView::platformRemoveChild(Widget*) |
| { |
| } |
| |
| void ScrollView::updateContents(const IntRect& rect, bool now) |
| { |
| if (rect.isEmpty()) |
| return; |
| |
| IntPoint windowPoint = contentsToWindow(rect.location()); |
| IntRect containingWindowRect = rect; |
| containingWindowRect.setLocation(windowPoint); |
| |
| updateWindowRect(containingWindowRect, now); |
| } |
| |
| void ScrollView::updateWindowRect(const IntRect& rect, bool now) |
| { |
| RECT containingWindowRectWin = rect; |
| HWND containingWindowHandle = containingWindow(); |
| |
| ::InvalidateRect(containingWindowHandle, &containingWindowRectWin, false); |
| |
| // Cache the dirty spot. |
| addToDirtyRegion(rect); |
| |
| if (now) |
| ::UpdateWindow(containingWindowHandle); |
| } |
| |
| void ScrollView::update() |
| { |
| ::UpdateWindow(containingWindow()); |
| } |
| |
| void ScrollView::setFrameRect(const IntRect& newGeometry) |
| { |
| IntRect oldGeometry = frameRect(); |
| Widget::setFrameRect(newGeometry); |
| |
| if (newGeometry == oldGeometry) |
| return; |
| |
| if (newGeometry.width() != oldGeometry.width() || newGeometry.height() != oldGeometry.height()) { |
| updateScrollbars(m_scrollOffset); |
| static_cast<FrameView*>(this)->setNeedsLayout(); |
| } |
| |
| frameRectsChanged(); |
| } |
| |
| void ScrollView::updateScrollbars(const IntSize& desiredOffset) |
| { |
| // Don't allow re-entrancy into this function. |
| if (m_data->m_inUpdateScrollbars) |
| return; |
| |
| // FIXME: This code is here so we don't have to fork FrameView.h/.cpp. |
| // In the end, FrameView should just merge with ScrollView. |
| if (static_cast<const FrameView*>(this)->frame()->prohibitsScrolling()) |
| return; |
| |
| m_data->m_inUpdateScrollbars = true; |
| |
| bool hasVerticalScrollbar = m_verticalScrollbar; |
| bool hasHorizontalScrollbar = m_horizontalScrollbar; |
| bool oldHasVertical = hasVerticalScrollbar; |
| bool oldHasHorizontal = hasHorizontalScrollbar; |
| ScrollbarMode hScroll = m_horizontalScrollbarMode; |
| ScrollbarMode vScroll = m_verticalScrollbarMode; |
| |
| const int scrollbarThickness = ScrollbarTheme::nativeTheme()->scrollbarThickness(); |
| |
| for (int pass = 0; pass < 2; pass++) { |
| bool scrollsVertically; |
| bool scrollsHorizontally; |
| |
| if (!m_scrollbarsSuppressed && (hScroll == ScrollbarAuto || vScroll == ScrollbarAuto)) { |
| // Do a layout if pending before checking if scrollbars are needed. |
| if (hasVerticalScrollbar != oldHasVertical || hasHorizontalScrollbar != oldHasHorizontal) |
| static_cast<FrameView*>(this)->layout(); |
| |
| scrollsVertically = (vScroll == ScrollbarAlwaysOn) || (vScroll == ScrollbarAuto && contentsHeight() > height()); |
| if (scrollsVertically) |
| scrollsHorizontally = (hScroll == ScrollbarAlwaysOn) || (hScroll == ScrollbarAuto && contentsWidth() + scrollbarThickness > width()); |
| else { |
| scrollsHorizontally = (hScroll == ScrollbarAlwaysOn) || (hScroll == ScrollbarAuto && contentsWidth() > width()); |
| if (scrollsHorizontally) |
| scrollsVertically = (vScroll == ScrollbarAlwaysOn) || (vScroll == ScrollbarAuto && contentsHeight() + scrollbarThickness > height()); |
| } |
| } |
| else { |
| scrollsHorizontally = (hScroll == ScrollbarAuto) ? hasHorizontalScrollbar : (hScroll == ScrollbarAlwaysOn); |
| scrollsVertically = (vScroll == ScrollbarAuto) ? hasVerticalScrollbar : (vScroll == ScrollbarAlwaysOn); |
| } |
| |
| if (hasVerticalScrollbar != scrollsVertically) { |
| m_data->setHasVerticalScrollbar(scrollsVertically); |
| hasVerticalScrollbar = scrollsVertically; |
| } |
| |
| if (hasHorizontalScrollbar != scrollsHorizontally) { |
| m_data->setHasHorizontalScrollbar(scrollsHorizontally); |
| hasHorizontalScrollbar = scrollsHorizontally; |
| } |
| } |
| |
| // Set up the range (and page step/line step). |
| IntSize maxScrollPosition(contentsWidth() - visibleWidth(), contentsHeight() - visibleHeight()); |
| IntSize scroll = desiredOffset.shrunkTo(maxScrollPosition); |
| scroll.clampNegativeToZero(); |
| |
| if (m_horizontalScrollbar) { |
| int clientWidth = visibleWidth(); |
| m_horizontalScrollbar->setEnabled(contentsWidth() > clientWidth); |
| int pageStep = (clientWidth - cAmountToKeepWhenPaging); |
| if (pageStep < 0) pageStep = clientWidth; |
| IntRect oldRect(m_horizontalScrollbar->frameRect()); |
| IntRect hBarRect = IntRect(0, |
| height() - m_horizontalScrollbar->height(), |
| width() - (m_verticalScrollbar ? m_verticalScrollbar->width() : 0), |
| m_horizontalScrollbar->height()); |
| m_horizontalScrollbar->setFrameRect(hBarRect); |
| if (!m_scrollbarsSuppressed && oldRect != m_horizontalScrollbar->frameRect()) |
| m_horizontalScrollbar->invalidate(); |
| |
| if (m_scrollbarsSuppressed) |
| m_horizontalScrollbar->setSuppressInvalidation(true); |
| m_horizontalScrollbar->setSteps(cScrollbarPixelsPerLineStep, pageStep); |
| m_horizontalScrollbar->setProportion(clientWidth, contentsWidth()); |
| m_horizontalScrollbar->setValue(scroll.width()); |
| if (m_scrollbarsSuppressed) |
| m_horizontalScrollbar->setSuppressInvalidation(false); |
| } |
| |
| if (m_verticalScrollbar) { |
| int clientHeight = visibleHeight(); |
| m_verticalScrollbar->setEnabled(contentsHeight() > clientHeight); |
| int pageStep = (clientHeight - cAmountToKeepWhenPaging); |
| if (pageStep < 0) pageStep = clientHeight; |
| IntRect oldRect(m_verticalScrollbar->frameRect()); |
| IntRect vBarRect = IntRect(width() - m_verticalScrollbar->width(), |
| 0, |
| m_verticalScrollbar->width(), |
| height() - (m_horizontalScrollbar ? m_horizontalScrollbar->height() : 0)); |
| m_verticalScrollbar->setFrameRect(vBarRect); |
| if (!m_scrollbarsSuppressed && oldRect != m_verticalScrollbar->frameRect()) |
| m_verticalScrollbar->invalidate(); |
| |
| if (m_scrollbarsSuppressed) |
| m_verticalScrollbar->setSuppressInvalidation(true); |
| m_verticalScrollbar->setSteps(cScrollbarPixelsPerLineStep, pageStep); |
| m_verticalScrollbar->setProportion(clientHeight, contentsHeight()); |
| m_verticalScrollbar->setValue(scroll.height()); |
| if (m_scrollbarsSuppressed) |
| m_verticalScrollbar->setSuppressInvalidation(false); |
| } |
| |
| if (oldHasVertical != (m_verticalScrollbar != 0) || oldHasHorizontal != (m_horizontalScrollbar != 0)) |
| frameRectsChanged(); |
| |
| // See if our offset has changed in a situation where we might not have scrollbars. |
| // This can happen when editing a body with overflow:hidden and scrolling to reveal selection. |
| // It can also happen when maximizing a window that has scrollbars (but the new maximized result |
| // does not). |
| IntSize scrollDelta = scroll - m_scrollOffset; |
| if (scrollDelta != IntSize()) { |
| m_scrollOffset = scroll; |
| m_data->scrollBackingStore(scrollDelta); |
| } |
| |
| m_data->m_inUpdateScrollbars = false; |
| } |
| |
| void ScrollView::printPanScrollIcon(const IntPoint& iconPosition) |
| { |
| m_data->m_drawPanScrollIcon = true; |
| m_data->m_panScrollIconPoint = IntPoint(iconPosition.x() - panIconSizeLength / 2 , iconPosition.y() - panIconSizeLength / 2) ; |
| |
| updateWindowRect(IntRect(m_data->m_panScrollIconPoint, IntSize(panIconSizeLength,panIconSizeLength)), true); |
| } |
| |
| void ScrollView::removePanScrollIcon() |
| { |
| m_data->m_drawPanScrollIcon = false; |
| |
| updateWindowRect(IntRect(m_data->m_panScrollIconPoint, IntSize(panIconSizeLength, panIconSizeLength)), true); |
| } |
| |
| void ScrollView::paint(GraphicsContext* context, const IntRect& rect) |
| { |
| // FIXME: This code is here so we don't have to fork FrameView.h/.cpp. |
| // In the end, FrameView should just merge with ScrollView. |
| ASSERT(isFrameView()); |
| |
| if (context->paintingDisabled() && !context->updatingControlTints()) |
| return; |
| |
| IntRect documentDirtyRect = rect; |
| documentDirtyRect.intersect(frameRect()); |
| |
| context->save(); |
| |
| context->translate(x(), y()); |
| documentDirtyRect.move(-x(), -y()); |
| |
| context->translate(-scrollX(), -scrollY()); |
| documentDirtyRect.move(scrollX(), scrollY()); |
| |
| context->clip(visibleContentRect()); |
| |
| const FrameView* frameView = static_cast<const FrameView*>(this); |
| frameView->frame()->paint(context, documentDirtyRect); |
| |
| context->restore(); |
| |
| // Now paint the scrollbars. |
| if (!m_scrollbarsSuppressed && (m_horizontalScrollbar || m_verticalScrollbar)) { |
| context->save(); |
| IntRect scrollViewDirtyRect = rect; |
| scrollViewDirtyRect.intersect(frameRect()); |
| context->translate(x(), y()); |
| scrollViewDirtyRect.move(-x(), -y()); |
| if (m_horizontalScrollbar) |
| m_horizontalScrollbar->paint(context, scrollViewDirtyRect); |
| if (m_verticalScrollbar) |
| m_verticalScrollbar->paint(context, scrollViewDirtyRect); |
| |
| // Fill the scroll corner with white. |
| IntRect hCorner; |
| if (m_horizontalScrollbar && width() - m_horizontalScrollbar->width() > 0) { |
| hCorner = IntRect(m_horizontalScrollbar->width(), |
| height() - m_horizontalScrollbar->height(), |
| width() - m_horizontalScrollbar->width(), |
| m_horizontalScrollbar->height()); |
| if (hCorner.intersects(scrollViewDirtyRect)) { |
| Page* page = frameView->frame() ? frameView->frame()->page() : 0; |
| if (page && page->settings()->shouldPaintCustomScrollbars()) { |
| if (!page->chrome()->client()->paintCustomScrollCorner(context, hCorner)) |
| context->fillRect(hCorner, Color::white); |
| } |
| } |
| } |
| |
| if (m_verticalScrollbar && height() - m_verticalScrollbar->height() > 0) { |
| IntRect vCorner(width() - m_verticalScrollbar->width(), |
| m_verticalScrollbar->height(), |
| m_verticalScrollbar->width(), |
| height() - m_verticalScrollbar->height()); |
| if (vCorner != hCorner && vCorner.intersects(scrollViewDirtyRect)) { |
| Page* page = frameView->frame() ? frameView->frame()->page() : 0; |
| if (page && page->settings()->shouldPaintCustomScrollbars()) { |
| if (!page->chrome()->client()->paintCustomScrollCorner(context, vCorner)) |
| context->fillRect(vCorner, Color::white); |
| } |
| } |
| } |
| |
| context->restore(); |
| } |
| |
| //Paint the panScroll Icon |
| static RefPtr<Image> panScrollIcon; |
| if (m_data->m_drawPanScrollIcon) { |
| if (!panScrollIcon) |
| panScrollIcon = Image::loadPlatformResource("panIcon"); |
| context->drawImage(panScrollIcon.get(), m_data->m_panScrollIconPoint); |
| } |
| } |
| |
| void ScrollView::themeChanged() |
| { |
| ScrollbarTheme::nativeTheme()->themeChanged(); |
| theme()->themeChanged(); |
| invalidate(); |
| } |
| |
| void ScrollView::setParentVisible(bool visible) |
| { |
| if (isParentVisible() == visible) |
| return; |
| |
| Widget::setParentVisible(visible); |
| |
| if (isVisible()) { |
| HashSet<Widget*>::iterator end = m_children.end(); |
| for (HashSet<Widget*>::iterator it = m_children.begin(); it != end; ++it) |
| (*it)->setParentVisible(visible); |
| } |
| } |
| |
| void ScrollView::show() |
| { |
| if (!isSelfVisible()) { |
| setSelfVisible(true); |
| if (isParentVisible()) { |
| HashSet<Widget*>::iterator end = m_children.end(); |
| for (HashSet<Widget*>::iterator it = m_children.begin(); it != end; ++it) |
| (*it)->setParentVisible(true); |
| } |
| } |
| |
| Widget::show(); |
| } |
| |
| void ScrollView::hide() |
| { |
| if (isSelfVisible()) { |
| if (isParentVisible()) { |
| HashSet<Widget*>::iterator end = m_children.end(); |
| for (HashSet<Widget*>::iterator it = m_children.begin(); it != end; ++it) |
| (*it)->setParentVisible(false); |
| } |
| setSelfVisible(false); |
| } |
| |
| Widget::hide(); |
| } |
| |
| void ScrollView::addToDirtyRegion(const IntRect& containingWindowRect) |
| { |
| ASSERT(isFrameView()); |
| const FrameView* frameView = static_cast<const FrameView*>(this); |
| Page* page = frameView->frame() ? frameView->frame()->page() : 0; |
| if (!page) |
| return; |
| page->chrome()->addToDirtyRegion(containingWindowRect); |
| } |
| |
| void ScrollView::scrollBackingStore(int dx, int dy, const IntRect& scrollViewRect, const IntRect& clipRect) |
| { |
| ASSERT(isFrameView()); |
| const FrameView* frameView = static_cast<const FrameView*>(this); |
| Page* page = frameView->frame() ? frameView->frame()->page() : 0; |
| if (!page) |
| return; |
| page->chrome()->scrollBackingStore(dx, dy, scrollViewRect, clipRect); |
| } |
| |
| void ScrollView::updateBackingStore() |
| { |
| ASSERT(isFrameView()); |
| const FrameView* frameView = static_cast<const FrameView*>(this); |
| Page* page = frameView->frame() ? frameView->frame()->page() : 0; |
| if (!page) |
| return; |
| page->chrome()->updateBackingStore(); |
| } |
| |
| bool ScrollView::isOffscreen() const |
| { |
| return false; |
| } |
| |
| IntRect ScrollView::contentsToScreen(const IntRect& rect) const |
| { |
| IntRect result(contentsToWindow(rect)); |
| POINT topLeft = {0, 0}; |
| |
| // Find the top left corner of the Widget's containing window in screen coords, |
| // and adjust the result rect's position by this amount. |
| ::ClientToScreen(containingWindow(), &topLeft); |
| result.move(topLeft.x, topLeft.y); |
| |
| return result; |
| } |
| |
| IntPoint ScrollView::screenToContents(const IntPoint& point) const |
| { |
| POINT result = point; |
| |
| ::ScreenToClient(containingWindow(), &result); |
| |
| return windowToContents(result); |
| } |
| |
| } // namespace WebCore |
