| /* |
| * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
| * Copyright (C) 2006 Dirk Mueller <mueller@kde.org> |
| * Copyright (C) 2006 Zack Rusin <zack@kde.org> |
| * Copyright (C) 2006 George Staikos <staikos@kde.org> |
| * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org> |
| * |
| * 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 "FrameView.h" |
| #include "FloatRect.h" |
| #include "FocusController.h" |
| #include "IntPoint.h" |
| #include "PlatformMouseEvent.h" |
| #include "PlatformWheelEvent.h" |
| #include "NotImplemented.h" |
| #include "Frame.h" |
| #include "Page.h" |
| #include "GraphicsContext.h" |
| #include "PlatformScrollBar.h" |
| |
| #include <QDebug> |
| #include <QWidget> |
| #include <QPainter> |
| |
| #ifdef Q_WS_MAC |
| #include <Carbon/Carbon.h> |
| #endif |
| |
| #include "qwebframe.h" |
| #include "qwebpage.h" |
| |
| // #define DEBUG_SCROLLVIEW |
| |
| namespace WebCore { |
| |
| class ScrollView::ScrollViewPrivate : public ScrollbarClient |
| { |
| public: |
| ScrollViewPrivate(ScrollView* view) |
| : m_view(view) |
| , m_hasStaticBackground(false) |
| , m_scrollbarsSuppressed(false) |
| , m_inUpdateScrollbars(false) |
| , m_scrollbarsAvoidingResizer(0) |
| , m_vScrollbarMode(ScrollbarAuto) |
| , m_hScrollbarMode(ScrollbarAuto) |
| { |
| } |
| |
| ~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; |
| IntSize m_scrollOffset; |
| IntSize m_contentsSize; |
| bool m_hasStaticBackground; |
| bool m_scrollbarsSuppressed; |
| bool m_inUpdateScrollbars; |
| int m_scrollbarsAvoidingResizer; |
| ScrollbarMode m_vScrollbarMode; |
| ScrollbarMode m_hScrollbarMode; |
| RefPtr<PlatformScrollbar> m_vBar; |
| RefPtr<PlatformScrollbar> m_hBar; |
| HashSet<Widget*> m_children; |
| }; |
| |
| void ScrollView::ScrollViewPrivate::setHasHorizontalScrollbar(bool hasBar) |
| { |
| if (Scrollbar::hasPlatformScrollbars()) { |
| if (hasBar && !m_hBar) { |
| m_hBar = new PlatformScrollbar(this, HorizontalScrollbar, RegularScrollbar); |
| m_view->addChild(m_hBar.get()); |
| } else if (!hasBar && m_hBar) { |
| m_view->removeChild(m_hBar.get());; |
| m_hBar = 0; |
| } |
| } |
| } |
| |
| void ScrollView::ScrollViewPrivate::setHasVerticalScrollbar(bool hasBar) |
| { |
| if (Scrollbar::hasPlatformScrollbars()) { |
| if (hasBar && !m_vBar) { |
| m_vBar = new PlatformScrollbar(this, VerticalScrollbar, RegularScrollbar); |
| m_view->addChild(m_vBar.get()); |
| } else if (!hasBar && m_vBar) { |
| m_view->removeChild(m_vBar.get()); |
| m_vBar = 0; |
| } |
| } |
| } |
| |
| void ScrollView::ScrollViewPrivate::valueChanged(Scrollbar* bar) |
| { |
| // Figure out if we really moved. |
| IntSize newOffset = m_scrollOffset; |
| if (bar) { |
| if (bar == m_hBar) |
| newOffset.setWidth(bar->value()); |
| else if (bar == m_vBar) |
| newOffset.setHeight(bar->value()); |
| } |
| IntSize scrollDelta = newOffset - m_scrollOffset; |
| if (scrollDelta == IntSize()) |
| return; |
| m_scrollOffset = newOffset; |
| |
| if (m_scrollbarsSuppressed) |
| return; |
| |
| scrollBackingStore(scrollDelta); |
| static_cast<FrameView*>(m_view)->frame()->sendScrollEvent(); |
| } |
| |
| 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. |
| 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); |
| |
| if (!m_hasStaticBackground) { |
| 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(); |
| } |
| |
| m_view->geometryChanged(); |
| } |
| |
| 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)) |
| { |
| } |
| |
| ScrollView::~ScrollView() |
| { |
| delete m_data; |
| } |
| |
| PlatformScrollbar *ScrollView::horizontalScrollBar() const |
| { |
| return m_data->m_hBar.get(); |
| } |
| |
| PlatformScrollbar *ScrollView::verticalScrollBar() const |
| { |
| return m_data->m_vBar.get(); |
| } |
| |
| void ScrollView::updateContents(const IntRect& rect, bool now) |
| { |
| if (rect.isEmpty()) |
| return; |
| |
| IntPoint windowPoint = contentsToWindow(rect.location()); |
| IntRect containingWindowRect = rect; |
| containingWindowRect.setLocation(windowPoint); |
| |
| // Cache the dirty spot. |
| addToDirtyRegion(containingWindowRect); |
| |
| if (now) |
| updateBackingStore(); |
| } |
| |
| void ScrollView::update() |
| { |
| QWidget* native = nativeWidget(); |
| if (native) { |
| native->update(); |
| return; |
| } |
| updateContents(IntRect(0, 0, width(), height())); |
| } |
| |
| int ScrollView::visibleWidth() const |
| { |
| return width() - (m_data->m_vBar ? m_data->m_vBar->width() : 0); |
| } |
| |
| int ScrollView::visibleHeight() const |
| { |
| return height() - (m_data->m_hBar ? m_data->m_hBar->height() : 0); |
| } |
| |
| FloatRect ScrollView::visibleContentRect() const |
| { |
| return FloatRect(contentsX(), contentsY(), visibleWidth(), visibleHeight()); |
| } |
| |
| FloatRect ScrollView::visibleContentRectConsideringExternalScrollers() const |
| { |
| // external scrollers not supported for now |
| return visibleContentRect(); |
| } |
| |
| void ScrollView::setContentsPos(int newX, int newY) |
| { |
| int dx = newX - contentsX(); |
| int dy = newY - contentsY(); |
| scrollBy(dx, dy); |
| } |
| |
| void ScrollView::resizeContents(int w, int h) |
| { |
| IntSize newContentsSize(w, h); |
| if (m_data->m_contentsSize != newContentsSize) { |
| m_data->m_contentsSize = newContentsSize; |
| updateScrollbars(m_data->m_scrollOffset); |
| } |
| } |
| |
| void ScrollView::setFrameGeometry(const IntRect& newGeometry) |
| { |
| IntRect oldGeometry = frameGeometry(); |
| Widget::setFrameGeometry(newGeometry); |
| |
| if (newGeometry == oldGeometry) |
| return; |
| |
| if (newGeometry.width() != oldGeometry.width() || newGeometry.height() != oldGeometry.height()) { |
| updateScrollbars(m_data->m_scrollOffset); |
| static_cast<FrameView*>(this)->setNeedsLayout(); |
| } |
| |
| geometryChanged(); |
| } |
| |
| HashSet<Widget*>* ScrollView::children() |
| { |
| return &(m_data->m_children); |
| } |
| |
| void ScrollView::geometryChanged() const |
| { |
| HashSet<Widget*>::const_iterator end = m_data->m_children.end(); |
| for (HashSet<Widget*>::const_iterator current = m_data->m_children.begin(); current != end; ++current) |
| (*current)->geometryChanged(); |
| } |
| |
| |
| int ScrollView::contentsX() const |
| { |
| return scrollOffset().width(); |
| } |
| |
| int ScrollView::contentsY() const |
| { |
| return scrollOffset().height(); |
| } |
| |
| int ScrollView::contentsWidth() const |
| { |
| return m_data->m_contentsSize.width(); |
| } |
| |
| int ScrollView::contentsHeight() const |
| { |
| return m_data->m_contentsSize.height(); |
| } |
| |
| IntPoint ScrollView::windowToContents(const IntPoint& windowPoint) const |
| { |
| IntPoint viewPoint = convertFromContainingWindow(windowPoint); |
| return viewPoint + scrollOffset(); |
| } |
| |
| IntPoint ScrollView::contentsToWindow(const IntPoint& contentsPoint) const |
| { |
| IntPoint viewPoint = contentsPoint - scrollOffset(); |
| return convertToContainingWindow(viewPoint); |
| } |
| |
| IntPoint ScrollView::convertChildToSelf(const Widget* child, const IntPoint& point) const |
| { |
| IntPoint newPoint = point; |
| if (child != m_data->m_hBar && child != m_data->m_vBar) |
| newPoint = point - scrollOffset(); |
| return Widget::convertChildToSelf(child, newPoint); |
| } |
| |
| IntPoint ScrollView::convertSelfToChild(const Widget* child, const IntPoint& point) const |
| { |
| IntPoint newPoint = point; |
| if (child != m_data->m_hBar && child != m_data->m_vBar) |
| newPoint = point + scrollOffset(); |
| return Widget::convertSelfToChild(child, newPoint); |
| } |
| |
| IntSize ScrollView::scrollOffset() const |
| { |
| return m_data->m_scrollOffset; |
| } |
| |
| IntSize ScrollView::maximumScroll() const |
| { |
| IntSize delta = (m_data->m_contentsSize - IntSize(visibleWidth(), visibleHeight())) - scrollOffset(); |
| delta.clampNegativeToZero(); |
| return delta; |
| } |
| |
| void ScrollView::scrollBy(int dx, int dy) |
| { |
| IntSize scrollOffset = m_data->m_scrollOffset; |
| IntSize newScrollOffset = scrollOffset + IntSize(dx, dy).shrunkTo(maximumScroll()); |
| newScrollOffset.clampNegativeToZero(); |
| |
| if (newScrollOffset == scrollOffset) |
| return; |
| |
| updateScrollbars(newScrollOffset); |
| } |
| |
| void ScrollView::scrollRectIntoViewRecursively(const IntRect& r) |
| { |
| IntPoint p(max(0, r.x()), max(0, r.y())); |
| ScrollView* view = this; |
| while (view) { |
| view->setContentsPos(p.x(), p.y()); |
| p.move(view->x() - view->scrollOffset().width(), view->y() - view->scrollOffset().height()); |
| view = static_cast<ScrollView*>(parent()); |
| } |
| } |
| |
| WebCore::ScrollbarMode ScrollView::hScrollbarMode() const |
| { |
| return m_data->m_hScrollbarMode; |
| } |
| |
| WebCore::ScrollbarMode ScrollView::vScrollbarMode() const |
| { |
| return m_data->m_vScrollbarMode; |
| } |
| |
| void ScrollView::suppressScrollbars(bool suppressed, bool repaintOnSuppress) |
| { |
| m_data->m_scrollbarsSuppressed = suppressed; |
| if (repaintOnSuppress && !suppressed) { |
| if (m_data->m_hBar) |
| m_data->m_hBar->invalidate(); |
| if (m_data->m_vBar) |
| m_data->m_vBar->invalidate(); |
| |
| // Invalidate the scroll corner too on unsuppress. |
| IntRect hCorner; |
| if (m_data->m_hBar && width() - m_data->m_hBar->width() > 0) { |
| hCorner = IntRect(m_data->m_hBar->width(), |
| height() - m_data->m_hBar->height(), |
| width() - m_data->m_hBar->width(), |
| m_data->m_hBar->height()); |
| invalidateRect(hCorner); |
| } |
| |
| if (m_data->m_vBar && height() - m_data->m_vBar->height() > 0) { |
| IntRect vCorner(width() - m_data->m_vBar->width(), |
| m_data->m_vBar->height(), |
| m_data->m_vBar->width(), |
| height() - m_data->m_vBar->height()); |
| if (vCorner != hCorner) |
| invalidateRect(vCorner); |
| } |
| } |
| } |
| |
| void ScrollView::setHScrollbarMode(ScrollbarMode newMode) |
| { |
| if (m_data->m_hScrollbarMode != newMode) { |
| m_data->m_hScrollbarMode = newMode; |
| updateScrollbars(m_data->m_scrollOffset); |
| } |
| } |
| |
| void ScrollView::setVScrollbarMode(ScrollbarMode newMode) |
| { |
| if (m_data->m_vScrollbarMode != newMode) { |
| m_data->m_vScrollbarMode = newMode; |
| updateScrollbars(m_data->m_scrollOffset); |
| } |
| } |
| |
| void ScrollView::setScrollbarsMode(ScrollbarMode newMode) |
| { |
| if (m_data->m_hScrollbarMode != newMode || |
| m_data->m_vScrollbarMode != newMode) { |
| m_data->m_hScrollbarMode = m_data->m_vScrollbarMode = newMode; |
| updateScrollbars(m_data->m_scrollOffset); |
| } |
| } |
| |
| void ScrollView::setStaticBackground(bool flag) |
| { |
| m_data->m_hasStaticBackground = flag; |
| } |
| |
| bool ScrollView::inWindow() const |
| { |
| return true; |
| } |
| |
| 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_data->m_vBar; |
| bool hasHorizontalScrollbar = m_data->m_hBar; |
| bool oldHasVertical = hasVerticalScrollbar; |
| bool oldHasHorizontal = hasHorizontalScrollbar; |
| ScrollbarMode hScroll = m_data->m_hScrollbarMode; |
| ScrollbarMode vScroll = m_data->m_vScrollbarMode; |
| |
| const int cVerticalWidth = PlatformScrollbar::verticalScrollbarWidth(); |
| const int cHorizontalHeight = PlatformScrollbar::horizontalScrollbarHeight(); |
| |
| for (int pass = 0; pass < 2; pass++) { |
| bool scrollsVertically; |
| bool scrollsHorizontally; |
| |
| if (!m_data->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() + cVerticalWidth > width()); |
| else { |
| scrollsHorizontally = (hScroll == ScrollbarAlwaysOn) || (hScroll == ScrollbarAuto && contentsWidth() > width()); |
| if (scrollsHorizontally) |
| scrollsVertically = (vScroll == ScrollbarAlwaysOn) || (vScroll == ScrollbarAuto && contentsHeight() + cHorizontalHeight > 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(); |
| |
| QPoint scrollbarOffset; |
| #ifdef Q_WS_MAC |
| // On Mac, offset the scrollbars so they don't cover the grow box. Check if the window |
| // has a grow box, and then check if the bottom-right corner of the scroll view |
| // intersercts it. The calculations are done in global coordinates. |
| QWidget* contentWidget = containingWindow(); |
| if (contentWidget) { |
| QWidget* windowWidget = contentWidget->window(); |
| if (windowWidget) { |
| HIViewRef growBox = 0; |
| HIViewFindByID(HIViewGetRoot(HIViewGetWindow(HIViewRef(contentWidget->winId()))), kHIViewWindowGrowBoxID, &growBox); |
| const QPoint contentBr = contentWidget->mapToGlobal(QPoint(0,0)) + contentWidget->size(); |
| const QPoint windowBr = windowWidget->mapToGlobal(QPoint(0,0)) + windowWidget->size(); |
| const QPoint contentOffset = (windowBr - contentBr); |
| const int growBoxSize = 15; |
| const bool enableOffset = (growBox != 0 && contentOffset.x() >= 0 && contentOffset. y() >= 0); |
| scrollbarOffset = enableOffset ? QPoint(growBoxSize - qMin(contentOffset.x(), growBoxSize), |
| growBoxSize - qMin(contentOffset.y(), growBoxSize)) |
| : QPoint(0,0); |
| } |
| } |
| #endif |
| |
| if (m_data->m_hBar) { |
| int clientWidth = visibleWidth(); |
| m_data->m_hBar->setEnabled(contentsWidth() > clientWidth); |
| int pageStep = (clientWidth - PAGE_KEEP); |
| if (pageStep < 0) pageStep = clientWidth; |
| IntRect oldRect(m_data->m_hBar->frameGeometry()); |
| IntRect hBarRect = IntRect(0, |
| height() - m_data->m_hBar->height(), |
| width() - (m_data->m_vBar ? m_data->m_vBar->width() : scrollbarOffset.x()), |
| m_data->m_hBar->height()); |
| m_data->m_hBar->setRect(hBarRect); |
| if (!m_data->m_scrollbarsSuppressed && oldRect != m_data->m_hBar->frameGeometry()) |
| m_data->m_hBar->invalidate(); |
| |
| if (m_data->m_scrollbarsSuppressed) |
| m_data->m_hBar->setSuppressInvalidation(true); |
| m_data->m_hBar->setSteps(LINE_STEP, pageStep); |
| m_data->m_hBar->setProportion(clientWidth, contentsWidth()); |
| m_data->m_hBar->setValue(scroll.width()); |
| if (m_data->m_scrollbarsSuppressed) |
| m_data->m_hBar->setSuppressInvalidation(false); |
| } |
| |
| if (m_data->m_vBar) { |
| int clientHeight = visibleHeight(); |
| m_data->m_vBar->setEnabled(contentsHeight() > clientHeight); |
| int pageStep = (clientHeight - PAGE_KEEP); |
| if (pageStep < 0) pageStep = clientHeight; |
| IntRect oldRect(m_data->m_vBar->frameGeometry()); |
| IntRect vBarRect = IntRect(width() - m_data->m_vBar->width(), |
| 0, |
| m_data->m_vBar->width(), |
| height() - (m_data->m_hBar ? m_data->m_hBar->height() : scrollbarOffset.y())); |
| m_data->m_vBar->setRect(vBarRect); |
| if (!m_data->m_scrollbarsSuppressed && oldRect != m_data->m_vBar->frameGeometry()) |
| m_data->m_vBar->invalidate(); |
| |
| if (m_data->m_scrollbarsSuppressed) |
| m_data->m_vBar->setSuppressInvalidation(true); |
| m_data->m_vBar->setSteps(LINE_STEP, pageStep); |
| m_data->m_vBar->setProportion(clientHeight, contentsHeight()); |
| m_data->m_vBar->setValue(scroll.height()); |
| if (m_data->m_scrollbarsSuppressed) |
| m_data->m_vBar->setSuppressInvalidation(false); |
| } |
| |
| if (oldHasVertical != (m_data->m_vBar != 0) || oldHasHorizontal != (m_data->m_hBar != 0)) |
| geometryChanged(); |
| |
| // 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_data->m_scrollOffset; |
| if (scrollDelta != IntSize()) { |
| m_data->m_scrollOffset = scroll; |
| m_data->scrollBackingStore(scrollDelta); |
| } |
| |
| m_data->m_inUpdateScrollbars = false; |
| } |
| |
| PlatformScrollbar* ScrollView::scrollbarUnderMouse(const PlatformMouseEvent& mouseEvent) |
| { |
| IntPoint viewPoint = convertFromContainingWindow(mouseEvent.pos()); |
| if (m_data->m_hBar && m_data->m_hBar->frameGeometry().contains(viewPoint)) |
| return m_data->m_hBar.get(); |
| if (m_data->m_vBar && m_data->m_vBar->frameGeometry().contains(viewPoint)) |
| return m_data->m_vBar.get(); |
| return 0; |
| } |
| |
| void ScrollView::addChild(Widget* child) |
| { |
| child->setParent(this); |
| m_data->m_children.add(child); |
| } |
| |
| void ScrollView::removeChild(Widget* child) |
| { |
| child->setParent(0); |
| child->hide(); |
| m_data->m_children.remove(child); |
| } |
| |
| 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()) |
| return; |
| |
| IntRect documentDirtyRect = rect; |
| |
| context->save(); |
| |
| context->translate(x(), y()); |
| documentDirtyRect.move(-x(), -y()); |
| |
| context->translate(-contentsX(), -contentsY()); |
| documentDirtyRect.move(contentsX(), contentsY()); |
| |
| documentDirtyRect.intersect(enclosingIntRect(visibleContentRect())); |
| context->clip(documentDirtyRect); |
| |
| static_cast<const FrameView*>(this)->frame()->paint(context, documentDirtyRect); |
| |
| context->restore(); |
| |
| // Now paint the scrollbars. |
| if (!m_data->m_scrollbarsSuppressed && (m_data->m_hBar || m_data->m_vBar)) { |
| context->save(); |
| IntRect scrollViewDirtyRect = rect; |
| scrollViewDirtyRect.intersect(frameGeometry()); |
| context->translate(x(), y()); |
| scrollViewDirtyRect.move(-x(), -y()); |
| if (m_data->m_hBar) |
| m_data->m_hBar->paint(context, scrollViewDirtyRect); |
| if (m_data->m_vBar) |
| m_data->m_vBar->paint(context, scrollViewDirtyRect); |
| |
| // Fill the scroll corner with white. |
| IntRect hCorner; |
| if (m_data->m_hBar && width() - m_data->m_hBar->width() > 0) { |
| hCorner = IntRect(m_data->m_hBar->width(), |
| height() - m_data->m_hBar->height(), |
| width() - m_data->m_hBar->width(), |
| m_data->m_hBar->height()); |
| if (hCorner.intersects(scrollViewDirtyRect)) |
| context->fillRect(hCorner, Color::white); |
| } |
| |
| if (m_data->m_vBar && height() - m_data->m_vBar->height() > 0) { |
| IntRect vCorner(width() - m_data->m_vBar->width(), |
| m_data->m_vBar->height(), |
| m_data->m_vBar->width(), |
| height() - m_data->m_vBar->height()); |
| if (vCorner != hCorner && vCorner.intersects(scrollViewDirtyRect)) |
| context->fillRect(vCorner, Color::white); |
| } |
| |
| context->restore(); |
| } |
| } |
| |
| void ScrollView::wheelEvent(PlatformWheelEvent& e) |
| { |
| // Determine how much we want to scroll. If we can move at all, we will accept the event. |
| IntSize maxScrollDelta = maximumScroll(); |
| if ((e.deltaX() < 0 && maxScrollDelta.width() > 0) || |
| (e.deltaX() > 0 && scrollOffset().width() > 0) || |
| (e.deltaY() < 0 && maxScrollDelta.height() > 0) || |
| (e.deltaY() > 0 && scrollOffset().height() > 0)) |
| e.accept(); |
| |
| scrollBy(-e.deltaX() * LINE_STEP, -e.deltaY() * LINE_STEP); |
| } |
| |
| bool ScrollView::scroll(ScrollDirection direction, ScrollGranularity granularity) |
| { |
| if (direction == ScrollUp || direction == ScrollDown) { |
| if (m_data->m_vBar) |
| return m_data->m_vBar->scroll(direction, granularity); |
| } else { |
| if (m_data->m_hBar) |
| return m_data->m_hBar->scroll(direction, granularity); |
| } |
| return false; |
| } |
| |
| IntRect ScrollView::windowResizerRect() |
| { |
| ASSERT(isFrameView()); |
| const FrameView* frameView = static_cast<const FrameView*>(this); |
| Page* page = frameView->frame() ? frameView->frame()->page() : 0; |
| if (!page) |
| return IntRect(); |
| return page->chrome()->windowResizerRect(); |
| } |
| |
| bool ScrollView::resizerOverlapsContent() const |
| { |
| return !m_data->m_scrollbarsAvoidingResizer; |
| } |
| |
| void ScrollView::adjustOverlappingScrollbarCount(int overlapDelta) |
| { |
| int oldCount = m_data->m_scrollbarsAvoidingResizer; |
| m_data->m_scrollbarsAvoidingResizer += overlapDelta; |
| if (parent() && parent()->isFrameView()) |
| static_cast<FrameView*>(parent())->adjustOverlappingScrollbarCount(overlapDelta); |
| else if (!m_data->m_scrollbarsSuppressed) { |
| // If we went from n to 0 or from 0 to n and we're the outermost view, |
| // we need to invalidate the windowResizerRect(), since it will now need to paint |
| // differently. |
| if (oldCount > 0 && m_data->m_scrollbarsAvoidingResizer == 0 || |
| oldCount == 0 && m_data->m_scrollbarsAvoidingResizer > 0) |
| invalidateRect(windowResizerRect()); |
| } |
| } |
| |
| void ScrollView::setParent(ScrollView* parentView) |
| { |
| if (!parentView && m_data->m_scrollbarsAvoidingResizer && parent() && parent()->isFrameView()) |
| static_cast<FrameView*>(parent())->adjustOverlappingScrollbarCount(false); |
| Widget::setParent(parentView); |
| } |
| |
| 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(); |
| } |
| |
| } |
| |
| // vim: ts=4 sw=4 et |
