| /* |
| * 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 "GraphicsContext.h" |
| #include "HostWindow.h" |
| #include "PlatformMouseEvent.h" |
| #include "PlatformWheelEvent.h" |
| #include "Scrollbar.h" |
| #include "ScrollbarTheme.h" |
| #include <wtf/StdLibExtras.h> |
| |
| using std::max; |
| |
| namespace WebCore { |
| |
| ScrollView::ScrollView() |
| : m_horizontalScrollbarMode(ScrollbarAuto) |
| , m_verticalScrollbarMode(ScrollbarAuto) |
| , m_prohibitsScrolling(false) |
| , m_canBlitOnScroll(true) |
| , m_scrollbarsAvoidingResizer(0) |
| , m_scrollbarsSuppressed(false) |
| , m_inUpdateScrollbars(false) |
| , m_updateScrollbarsPass(0) |
| , m_drawPanScrollIcon(false) |
| , m_useFixedLayout(false) |
| , m_paintsEntireContents(false) |
| { |
| platformInit(); |
| } |
| |
| ScrollView::~ScrollView() |
| { |
| platformDestroy(); |
| } |
| |
| void ScrollView::addChild(PassRefPtr<Widget> prpChild) |
| { |
| Widget* child = prpChild.get(); |
| ASSERT(child != this && !child->parent()); |
| child->setParent(this); |
| m_children.add(prpChild); |
| if (child->platformWidget()) |
| platformAddChild(child); |
| } |
| |
| void ScrollView::removeChild(Widget* child) |
| { |
| ASSERT(child->parent() == this); |
| child->setParent(0); |
| m_children.remove(child); |
| if (child->platformWidget()) |
| platformRemoveChild(child); |
| } |
| |
| void ScrollView::setHasHorizontalScrollbar(bool hasBar) |
| { |
| if (hasBar && !m_horizontalScrollbar) { |
| m_horizontalScrollbar = createScrollbar(HorizontalScrollbar); |
| addChild(m_horizontalScrollbar.get()); |
| m_horizontalScrollbar->styleChanged(); |
| } else if (!hasBar && m_horizontalScrollbar) { |
| removeChild(m_horizontalScrollbar.get()); |
| m_horizontalScrollbar = 0; |
| } |
| } |
| |
| void ScrollView::setHasVerticalScrollbar(bool hasBar) |
| { |
| if (hasBar && !m_verticalScrollbar) { |
| m_verticalScrollbar = createScrollbar(VerticalScrollbar); |
| addChild(m_verticalScrollbar.get()); |
| m_verticalScrollbar->styleChanged(); |
| } else if (!hasBar && m_verticalScrollbar) { |
| removeChild(m_verticalScrollbar.get()); |
| m_verticalScrollbar = 0; |
| } |
| } |
| |
| #if !PLATFORM(GTK) |
| PassRefPtr<Scrollbar> ScrollView::createScrollbar(ScrollbarOrientation orientation) |
| { |
| return Scrollbar::createNativeScrollbar(this, orientation, RegularScrollbar); |
| } |
| |
| void ScrollView::setScrollbarModes(ScrollbarMode horizontalMode, ScrollbarMode verticalMode) |
| { |
| if (horizontalMode == horizontalScrollbarMode() && verticalMode == verticalScrollbarMode()) |
| return; |
| m_horizontalScrollbarMode = horizontalMode; |
| m_verticalScrollbarMode = verticalMode; |
| if (platformWidget()) |
| platformSetScrollbarModes(); |
| else |
| updateScrollbars(scrollOffset()); |
| } |
| #endif |
| |
| void ScrollView::scrollbarModes(ScrollbarMode& horizontalMode, ScrollbarMode& verticalMode) const |
| { |
| if (platformWidget()) { |
| platformScrollbarModes(horizontalMode, verticalMode); |
| return; |
| } |
| horizontalMode = m_horizontalScrollbarMode; |
| verticalMode = m_verticalScrollbarMode; |
| } |
| |
| void ScrollView::setCanHaveScrollbars(bool canScroll) |
| { |
| ScrollbarMode newHorizontalMode; |
| ScrollbarMode newVerticalMode; |
| |
| scrollbarModes(newHorizontalMode, newVerticalMode); |
| |
| if (canScroll && newVerticalMode == ScrollbarAlwaysOff) |
| newVerticalMode = ScrollbarAuto; |
| else if (!canScroll) |
| newVerticalMode = ScrollbarAlwaysOff; |
| |
| if (canScroll && newHorizontalMode == ScrollbarAlwaysOff) |
| newHorizontalMode = ScrollbarAuto; |
| else if (!canScroll) |
| newHorizontalMode = ScrollbarAlwaysOff; |
| |
| setScrollbarModes(newHorizontalMode, newVerticalMode); |
| } |
| |
| void ScrollView::setCanBlitOnScroll(bool b) |
| { |
| if (platformWidget()) { |
| platformSetCanBlitOnScroll(b); |
| return; |
| } |
| |
| m_canBlitOnScroll = b; |
| } |
| |
| bool ScrollView::canBlitOnScroll() const |
| { |
| if (platformWidget()) |
| return platformCanBlitOnScroll(); |
| |
| return m_canBlitOnScroll; |
| } |
| |
| void ScrollView::setPaintsEntireContents(bool paintsEntireContents) |
| { |
| m_paintsEntireContents = paintsEntireContents; |
| } |
| |
| #if !PLATFORM(GTK) |
| IntRect ScrollView::visibleContentRect(bool includeScrollbars) const |
| { |
| if (platformWidget()) |
| return platformVisibleContentRect(includeScrollbars); |
| return IntRect(IntPoint(m_scrollOffset.width(), m_scrollOffset.height()), |
| IntSize(max(0, width() - (verticalScrollbar() && !includeScrollbars ? verticalScrollbar()->width() : 0)), |
| max(0, height() - (horizontalScrollbar() && !includeScrollbars ? horizontalScrollbar()->height() : 0)))); |
| } |
| #endif |
| |
| int ScrollView::layoutWidth() const |
| { |
| return m_fixedLayoutSize.isEmpty() || !m_useFixedLayout ? visibleWidth() : m_fixedLayoutSize.width(); |
| } |
| |
| int ScrollView::layoutHeight() const |
| { |
| return m_fixedLayoutSize.isEmpty() || !m_useFixedLayout ? visibleHeight() : m_fixedLayoutSize.height(); |
| } |
| |
| IntSize ScrollView::fixedLayoutSize() const |
| { |
| return m_fixedLayoutSize; |
| } |
| |
| void ScrollView::setFixedLayoutSize(const IntSize& newSize) |
| { |
| if (fixedLayoutSize() == newSize) |
| return; |
| m_fixedLayoutSize = newSize; |
| updateScrollbars(scrollOffset()); |
| } |
| |
| bool ScrollView::useFixedLayout() const |
| { |
| return m_useFixedLayout; |
| } |
| |
| void ScrollView::setUseFixedLayout(bool enable) |
| { |
| if (useFixedLayout() == enable) |
| return; |
| m_useFixedLayout = enable; |
| updateScrollbars(scrollOffset()); |
| } |
| |
| IntSize ScrollView::contentsSize() const |
| { |
| if (platformWidget()) |
| return platformContentsSize(); |
| return m_contentsSize; |
| } |
| |
| void ScrollView::setContentsSize(const IntSize& newSize) |
| { |
| if (contentsSize() == newSize) |
| return; |
| m_contentsSize = newSize; |
| if (platformWidget()) |
| platformSetContentsSize(); |
| else |
| updateScrollbars(scrollOffset()); |
| } |
| |
| IntPoint ScrollView::maximumScrollPosition() const |
| { |
| IntSize maximumOffset = contentsSize() - visibleContentRect().size(); |
| maximumOffset.clampNegativeToZero(); |
| return IntPoint(maximumOffset.width(), maximumOffset.height()); |
| } |
| |
| void ScrollView::valueChanged(Scrollbar* scrollbar) |
| { |
| // Figure out if we really moved. |
| IntSize newOffset = m_scrollOffset; |
| if (scrollbar) { |
| if (scrollbar->orientation() == HorizontalScrollbar) |
| newOffset.setWidth(scrollbar->value()); |
| else if (scrollbar->orientation() == VerticalScrollbar) |
| newOffset.setHeight(scrollbar->value()); |
| } |
| |
| IntSize scrollDelta = newOffset - m_scrollOffset; |
| if (scrollDelta == IntSize()) |
| return; |
| m_scrollOffset = newOffset; |
| |
| if (scrollbarsSuppressed()) |
| return; |
| |
| scrollContents(scrollDelta); |
| } |
| |
| void ScrollView::scrollRectIntoViewRecursively(const IntRect& r) |
| { |
| #if PLATFORM(ANDROID) |
| if (platformProhibitsScrolling()) |
| return; |
| #endif |
| // FIXME: This method is not transform-aware. It should just be moved to FrameView so that an accurate |
| // position for the child view can be determined. |
| IntRect rect = r; |
| ScrollView* view = this; |
| while (view) { |
| if (view->prohibitsScrolling()) // Allow the views to scroll into view recursively until we hit one that prohibits scrolling. |
| return; |
| view->setScrollPosition(rect.location()); |
| rect.move(view->x() - view->scrollOffset().width(), view->y() - view->scrollOffset().height()); |
| if (view->parent()) |
| rect.intersect(view->frameRect()); |
| view = view->parent(); |
| } |
| |
| // We may be embedded inside some containing platform scroll view that we don't manage. This is the case |
| // in Mail.app on OS X, for example, where the WebKit view for message bodies is inside a Cocoa NSScrollView |
| // that contains both it and message headers. Let the HostWindow know about this scroll so that it can pass the message |
| // on up the view chain. |
| // This rect is not clamped, since Mail actually relies on receiving an unclamped rect with negative coordinates in order to |
| // expose the headers. |
| if (hostWindow()) |
| hostWindow()->scrollRectIntoView(rect, this); |
| } |
| |
| void ScrollView::setScrollPosition(const IntPoint& scrollPoint) |
| { |
| if (prohibitsScrolling()) |
| return; |
| |
| if (platformWidget()) { |
| platformSetScrollPosition(scrollPoint); |
| return; |
| } |
| |
| IntPoint newScrollPosition = scrollPoint.shrunkTo(maximumScrollPosition()); |
| newScrollPosition.clampNegativeToZero(); |
| |
| if (newScrollPosition == scrollPosition()) |
| return; |
| |
| updateScrollbars(IntSize(newScrollPosition.x(), newScrollPosition.y())); |
| } |
| |
| bool ScrollView::scroll(ScrollDirection direction, ScrollGranularity granularity) |
| { |
| if (platformWidget()) |
| return platformScroll(direction, granularity); |
| |
| if (direction == ScrollUp || direction == ScrollDown) { |
| if (m_verticalScrollbar) |
| return m_verticalScrollbar->scroll(direction, granularity); |
| } else { |
| if (m_horizontalScrollbar) |
| return m_horizontalScrollbar->scroll(direction, granularity); |
| } |
| return false; |
| } |
| |
| static const unsigned cMaxUpdateScrollbarsPass = 2; |
| |
| void ScrollView::updateScrollbars(const IntSize& desiredOffset) |
| { |
| if (m_inUpdateScrollbars || prohibitsScrolling() || platformWidget()) |
| return; |
| |
| // If we came in here with the view already needing a layout, then go ahead and do that |
| // first. (This will be the common case, e.g., when the page changes due to window resizing for example). |
| // This layout will not re-enter updateScrollbars and does not count towards our max layout pass total. |
| if (!m_scrollbarsSuppressed) { |
| m_inUpdateScrollbars = true; |
| visibleContentsResized(); |
| m_inUpdateScrollbars = false; |
| } |
| |
| bool hasHorizontalScrollbar = m_horizontalScrollbar; |
| bool hasVerticalScrollbar = m_verticalScrollbar; |
| |
| bool newHasHorizontalScrollbar = hasHorizontalScrollbar; |
| bool newHasVerticalScrollbar = hasVerticalScrollbar; |
| |
| ScrollbarMode hScroll = m_horizontalScrollbarMode; |
| ScrollbarMode vScroll = m_verticalScrollbarMode; |
| |
| if (hScroll != ScrollbarAuto) |
| newHasHorizontalScrollbar = (hScroll == ScrollbarAlwaysOn); |
| if (vScroll != ScrollbarAuto) |
| newHasVerticalScrollbar = (vScroll == ScrollbarAlwaysOn); |
| |
| if (m_scrollbarsSuppressed || (hScroll != ScrollbarAuto && vScroll != ScrollbarAuto)) { |
| if (hasHorizontalScrollbar != newHasHorizontalScrollbar) |
| setHasHorizontalScrollbar(newHasHorizontalScrollbar); |
| if (hasVerticalScrollbar != newHasVerticalScrollbar) |
| setHasVerticalScrollbar(newHasVerticalScrollbar); |
| } else { |
| bool sendContentResizedNotification = false; |
| |
| IntSize docSize = contentsSize(); |
| IntSize frameSize = frameRect().size(); |
| |
| if (hScroll == ScrollbarAuto) { |
| newHasHorizontalScrollbar = docSize.width() > visibleWidth(); |
| if (newHasHorizontalScrollbar && !m_updateScrollbarsPass && docSize.width() <= frameSize.width() && docSize.height() <= frameSize.height()) |
| newHasHorizontalScrollbar = false; |
| } |
| if (vScroll == ScrollbarAuto) { |
| newHasVerticalScrollbar = docSize.height() > visibleHeight(); |
| if (newHasVerticalScrollbar && !m_updateScrollbarsPass && docSize.width() <= frameSize.width() && docSize.height() <= frameSize.height()) |
| newHasVerticalScrollbar = false; |
| } |
| |
| // If we ever turn one scrollbar off, always turn the other one off too. Never ever |
| // try to both gain/lose a scrollbar in the same pass. |
| if (!newHasHorizontalScrollbar && hasHorizontalScrollbar && vScroll != ScrollbarAlwaysOn) |
| newHasVerticalScrollbar = false; |
| if (!newHasVerticalScrollbar && hasVerticalScrollbar && hScroll != ScrollbarAlwaysOn) |
| newHasHorizontalScrollbar = false; |
| |
| if (hasHorizontalScrollbar != newHasHorizontalScrollbar) { |
| setHasHorizontalScrollbar(newHasHorizontalScrollbar); |
| sendContentResizedNotification = true; |
| } |
| |
| if (hasVerticalScrollbar != newHasVerticalScrollbar) { |
| setHasVerticalScrollbar(newHasVerticalScrollbar); |
| sendContentResizedNotification = true; |
| } |
| |
| if (sendContentResizedNotification && m_updateScrollbarsPass < cMaxUpdateScrollbarsPass) { |
| m_updateScrollbarsPass++; |
| contentsResized(); |
| visibleContentsResized(); |
| IntSize newDocSize = contentsSize(); |
| if (newDocSize == docSize) { |
| // The layout with the new scroll state had no impact on |
| // the document's overall size, so updateScrollbars didn't get called. |
| // Recur manually. |
| updateScrollbars(desiredOffset); |
| } |
| m_updateScrollbarsPass--; |
| } |
| } |
| |
| // Set up the range (and page step/line step), but only do this if we're not in a nested call (to avoid |
| // doing it multiple times). |
| if (m_updateScrollbarsPass) |
| return; |
| |
| m_inUpdateScrollbars = true; |
| 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 = max(max<int>(clientWidth * Scrollbar::minFractionToStepWhenPaging(), clientWidth - Scrollbar::maxOverlapBetweenPages()), 1); |
| 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(Scrollbar::pixelsPerLineStep(), 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 = max(max<int>(clientHeight * Scrollbar::minFractionToStepWhenPaging(), clientHeight - Scrollbar::maxOverlapBetweenPages()), 1); |
| 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(Scrollbar::pixelsPerLineStep(), pageStep); |
| m_verticalScrollbar->setProportion(clientHeight, contentsHeight()); |
| m_verticalScrollbar->setValue(scroll.height()); |
| if (m_scrollbarsSuppressed) |
| m_verticalScrollbar->setSuppressInvalidation(false); |
| } |
| |
| if (hasHorizontalScrollbar != (m_horizontalScrollbar != 0) || hasVerticalScrollbar != (m_verticalScrollbar != 0)) { |
| frameRectsChanged(); |
| updateScrollCorner(); |
| } |
| |
| // 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; |
| scrollContents(scrollDelta); |
| } |
| |
| m_inUpdateScrollbars = false; |
| } |
| |
| const int panIconSizeLength = 16; |
| |
| void ScrollView::scrollContents(const IntSize& scrollDelta) |
| { |
| if (!hostWindow()) |
| return; |
| |
| // 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 = windowClipRect(); |
| IntRect scrollViewRect = convertToContainingWindow(IntRect(0, 0, visibleWidth(), visibleHeight())); |
| IntRect updateRect = clipRect; |
| updateRect.intersect(scrollViewRect); |
| |
| // Invalidate the window (not the backing store). |
| hostWindow()->repaint(updateRect, 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)); |
| panScrollIconDirtyRect.intersect(clipRect); |
| hostWindow()->repaint(panScrollIconDirtyRect, true); |
| } |
| |
| if (canBlitOnScroll()) { // The main frame can just blit the WebView window |
| // FIXME: Find a way to blit subframes without blitting overlapping content |
| hostWindow()->scroll(-scrollDelta, scrollViewRect, clipRect); |
| } else { |
| // We need to go ahead and repaint the entire backing store. Do it now before moving the |
| // windowed plugins. |
| hostWindow()->repaint(updateRect, true, false, true); // Invalidate the backing store and repaint it synchronously |
| } |
| |
| // This call will move children with native widgets (plugins) and invalidate them as well. |
| frameRectsChanged(); |
| |
| // Now update the window (which should do nothing but a blit of the backing store's updateRect and so should |
| // be very fast). |
| hostWindow()->paint(); |
| } |
| |
| 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); |
| } |
| |
| IntRect ScrollView::windowToContents(const IntRect& windowRect) const |
| { |
| IntRect viewRect = convertFromContainingWindow(windowRect); |
| viewRect.move(scrollOffset()); |
| return viewRect; |
| } |
| |
| IntRect ScrollView::contentsToWindow(const IntRect& contentsRect) const |
| { |
| IntRect viewRect = contentsRect; |
| viewRect.move(-scrollOffset()); |
| return convertToContainingWindow(viewRect); |
| } |
| |
| IntRect ScrollView::contentsToScreen(const IntRect& rect) const |
| { |
| if (platformWidget()) |
| return platformContentsToScreen(rect); |
| if (!hostWindow()) |
| return IntRect(); |
| return hostWindow()->windowToScreen(contentsToWindow(rect)); |
| } |
| |
| IntPoint ScrollView::screenToContents(const IntPoint& point) const |
| { |
| if (platformWidget()) |
| return platformScreenToContents(point); |
| if (!hostWindow()) |
| return IntPoint(); |
| return windowToContents(hostWindow()->screenToWindow(point)); |
| } |
| |
| bool ScrollView::containsScrollbarsAvoidingResizer() const |
| { |
| return !m_scrollbarsAvoidingResizer; |
| } |
| |
| void ScrollView::adjustScrollbarsAvoidingResizerCount(int overlapDelta) |
| { |
| int oldCount = m_scrollbarsAvoidingResizer; |
| m_scrollbarsAvoidingResizer += overlapDelta; |
| if (parent()) |
| parent()->adjustScrollbarsAvoidingResizerCount(overlapDelta); |
| else if (!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_scrollbarsAvoidingResizer == 0) || |
| (oldCount == 0 && m_scrollbarsAvoidingResizer > 0)) |
| invalidateRect(windowResizerRect()); |
| } |
| } |
| |
| void ScrollView::setParent(ScrollView* parentView) |
| { |
| if (parentView == parent()) |
| return; |
| |
| if (m_scrollbarsAvoidingResizer && parent()) |
| parent()->adjustScrollbarsAvoidingResizerCount(-m_scrollbarsAvoidingResizer); |
| |
| Widget::setParent(parentView); |
| |
| if (m_scrollbarsAvoidingResizer && parent()) |
| parent()->adjustScrollbarsAvoidingResizerCount(m_scrollbarsAvoidingResizer); |
| } |
| |
| void ScrollView::setScrollbarsSuppressed(bool suppressed, bool repaintOnUnsuppress) |
| { |
| if (suppressed == m_scrollbarsSuppressed) |
| return; |
| |
| m_scrollbarsSuppressed = suppressed; |
| |
| if (platformWidget()) |
| platformSetScrollbarsSuppressed(repaintOnUnsuppress); |
| else if (repaintOnUnsuppress && !suppressed) { |
| if (m_horizontalScrollbar) |
| m_horizontalScrollbar->invalidate(); |
| if (m_verticalScrollbar) |
| m_verticalScrollbar->invalidate(); |
| |
| // Invalidate the scroll corner too on unsuppress. |
| invalidateRect(scrollCornerRect()); |
| } |
| } |
| |
| Scrollbar* ScrollView::scrollbarAtPoint(const IntPoint& windowPoint) |
| { |
| if (platformWidget()) |
| return 0; |
| |
| IntPoint viewPoint = convertFromContainingWindow(windowPoint); |
| if (m_horizontalScrollbar && m_horizontalScrollbar->frameRect().contains(viewPoint)) |
| return m_horizontalScrollbar.get(); |
| if (m_verticalScrollbar && m_verticalScrollbar->frameRect().contains(viewPoint)) |
| return m_verticalScrollbar.get(); |
| return 0; |
| } |
| |
| void ScrollView::wheelEvent(PlatformWheelEvent& e) |
| { |
| // We don't allow mouse wheeling to happen in a ScrollView that has had its scrollbars explicitly disabled. |
| #if PLATFORM(WX) |
| if (!canHaveScrollbars()) { |
| #else |
| if (!canHaveScrollbars() || platformWidget()) { |
| #endif |
| return; |
| } |
| |
| // Determine how much we want to scroll. If we can move at all, we will accept the event. |
| IntSize maxScrollDelta = maximumScrollPosition() - scrollPosition(); |
| 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(); |
| float deltaX = e.deltaX(); |
| float deltaY = e.deltaY(); |
| if (e.granularity() == ScrollByPageWheelEvent) { |
| ASSERT(deltaX == 0); |
| bool negative = deltaY < 0; |
| deltaY = max(max<int>(visibleHeight() * Scrollbar::minFractionToStepWhenPaging(), visibleHeight() - Scrollbar::maxOverlapBetweenPages()), 1); |
| if (negative) |
| deltaY = -deltaY; |
| } |
| scrollBy(IntSize(-deltaX, -deltaY)); |
| } |
| } |
| |
| void ScrollView::setFrameRect(const IntRect& newRect) |
| { |
| IntRect oldRect = frameRect(); |
| |
| if (newRect == oldRect) |
| return; |
| |
| Widget::setFrameRect(newRect); |
| |
| if (platformWidget()) |
| return; |
| |
| if (newRect.width() != oldRect.width() || newRect.height() != oldRect.height()) { |
| updateScrollbars(m_scrollOffset); |
| contentsResized(); |
| } |
| |
| frameRectsChanged(); |
| } |
| |
| void ScrollView::frameRectsChanged() |
| { |
| if (platformWidget()) |
| return; |
| |
| HashSet<RefPtr<Widget> >::const_iterator end = m_children.end(); |
| for (HashSet<RefPtr<Widget> >::const_iterator current = m_children.begin(); current != end; ++current) |
| (*current)->frameRectsChanged(); |
| } |
| |
| void ScrollView::repaintContentRectangle(const IntRect& rect, bool now) |
| { |
| IntRect paintRect = rect; |
| if (!paintsEntireContents()) |
| paintRect.intersect(visibleContentRect()); |
| #ifdef ANDROID_CAPTURE_OFFSCREEN_PAINTS |
| if (rect != paintRect) |
| platformOffscreenContentRectangle(visibleContentRect(), rect); |
| #endif |
| if (paintRect.isEmpty()) |
| return; |
| if (platformWidget()) { |
| platformRepaintContentRectangle(paintRect, now); |
| return; |
| } |
| |
| if (hostWindow()) |
| hostWindow()->repaint(contentsToWindow(paintRect), true, now); |
| } |
| |
| IntRect ScrollView::scrollCornerRect() const |
| { |
| IntRect cornerRect; |
| |
| if (m_horizontalScrollbar && width() - m_horizontalScrollbar->width() > 0) { |
| cornerRect.unite(IntRect(m_horizontalScrollbar->width(), |
| height() - m_horizontalScrollbar->height(), |
| width() - m_horizontalScrollbar->width(), |
| m_horizontalScrollbar->height())); |
| } |
| |
| if (m_verticalScrollbar && height() - m_verticalScrollbar->height() > 0) { |
| cornerRect.unite(IntRect(width() - m_verticalScrollbar->width(), |
| m_verticalScrollbar->height(), |
| m_verticalScrollbar->width(), |
| height() - m_verticalScrollbar->height())); |
| } |
| |
| return cornerRect; |
| } |
| |
| void ScrollView::updateScrollCorner() |
| { |
| } |
| |
| void ScrollView::paintScrollCorner(GraphicsContext* context, const IntRect& cornerRect) |
| { |
| ScrollbarTheme::nativeTheme()->paintScrollCorner(this, context, cornerRect); |
| } |
| |
| void ScrollView::paintScrollbars(GraphicsContext* context, const IntRect& rect) |
| { |
| if (m_horizontalScrollbar) |
| m_horizontalScrollbar->paint(context, rect); |
| if (m_verticalScrollbar) |
| m_verticalScrollbar->paint(context, rect); |
| |
| paintScrollCorner(context, scrollCornerRect()); |
| } |
| |
| void ScrollView::paintPanScrollIcon(GraphicsContext* context) |
| { |
| DEFINE_STATIC_LOCAL(Image*, panScrollIcon, (Image::loadPlatformResource("panIcon").releaseRef())); |
| context->drawImage(panScrollIcon, DeviceColorSpace, m_panScrollIconPoint); |
| } |
| |
| void ScrollView::paint(GraphicsContext* context, const IntRect& rect) |
| { |
| if (platformWidget()) { |
| Widget::paint(context, rect); |
| return; |
| } |
| |
| 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()); |
| |
| paintContents(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()); |
| |
| paintScrollbars(context, scrollViewDirtyRect); |
| |
| context->restore(); |
| } |
| |
| // Paint the panScroll Icon |
| if (m_drawPanScrollIcon) |
| paintPanScrollIcon(context); |
| } |
| |
| bool ScrollView::isPointInScrollbarCorner(const IntPoint& windowPoint) |
| { |
| if (!scrollbarCornerPresent()) |
| return false; |
| |
| IntPoint viewPoint = convertFromContainingWindow(windowPoint); |
| |
| if (m_horizontalScrollbar) { |
| int horizontalScrollbarYMin = m_horizontalScrollbar->frameRect().y(); |
| int horizontalScrollbarYMax = m_horizontalScrollbar->frameRect().y() + m_horizontalScrollbar->frameRect().height(); |
| int horizontalScrollbarXMin = m_horizontalScrollbar->frameRect().x() + m_horizontalScrollbar->frameRect().width(); |
| |
| return viewPoint.y() > horizontalScrollbarYMin && viewPoint.y() < horizontalScrollbarYMax && viewPoint.x() > horizontalScrollbarXMin; |
| } |
| |
| int verticalScrollbarXMin = m_verticalScrollbar->frameRect().x(); |
| int verticalScrollbarXMax = m_verticalScrollbar->frameRect().x() + m_verticalScrollbar->frameRect().width(); |
| int verticalScrollbarYMin = m_verticalScrollbar->frameRect().y() + m_verticalScrollbar->frameRect().height(); |
| |
| return viewPoint.x() > verticalScrollbarXMin && viewPoint.x() < verticalScrollbarXMax && viewPoint.y() > verticalScrollbarYMin; |
| } |
| |
| bool ScrollView::scrollbarCornerPresent() const |
| { |
| return (m_horizontalScrollbar && width() - m_horizontalScrollbar->width() > 0) || |
| (m_verticalScrollbar && height() - m_verticalScrollbar->height() > 0); |
| } |
| |
| IntRect ScrollView::convertFromScrollbarToContainingView(const Scrollbar* scrollbar, const IntRect& localRect) const |
| { |
| // Scrollbars won't be transformed within us |
| IntRect newRect = localRect; |
| newRect.move(scrollbar->x(), scrollbar->y()); |
| return newRect; |
| } |
| |
| IntRect ScrollView::convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntRect& parentRect) const |
| { |
| IntRect newRect = parentRect; |
| // Scrollbars won't be transformed within us |
| newRect.move(-scrollbar->x(), -scrollbar->y()); |
| return newRect; |
| } |
| |
| // FIXME: test these on windows |
| IntPoint ScrollView::convertFromScrollbarToContainingView(const Scrollbar* scrollbar, const IntPoint& localPoint) const |
| { |
| // Scrollbars won't be transformed within us |
| IntPoint newPoint = localPoint; |
| newPoint.move(scrollbar->x(), scrollbar->y()); |
| return newPoint; |
| } |
| |
| IntPoint ScrollView::convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntPoint& parentPoint) const |
| { |
| IntPoint newPoint = parentPoint; |
| // Scrollbars won't be transformed within us |
| newPoint.move(-scrollbar->x(), -scrollbar->y()); |
| return newPoint; |
| } |
| |
| void ScrollView::setParentVisible(bool visible) |
| { |
| if (isParentVisible() == visible) |
| return; |
| |
| Widget::setParentVisible(visible); |
| |
| if (!isSelfVisible()) |
| return; |
| |
| HashSet<RefPtr<Widget> >::iterator end = m_children.end(); |
| for (HashSet<RefPtr<Widget> >::iterator it = m_children.begin(); it != end; ++it) |
| (*it)->setParentVisible(visible); |
| } |
| |
| void ScrollView::show() |
| { |
| if (!isSelfVisible()) { |
| setSelfVisible(true); |
| if (isParentVisible()) { |
| HashSet<RefPtr<Widget> >::iterator end = m_children.end(); |
| for (HashSet<RefPtr<Widget> >::iterator it = m_children.begin(); it != end; ++it) |
| (*it)->setParentVisible(true); |
| } |
| } |
| |
| Widget::show(); |
| } |
| |
| void ScrollView::hide() |
| { |
| if (isSelfVisible()) { |
| if (isParentVisible()) { |
| HashSet<RefPtr<Widget> >::iterator end = m_children.end(); |
| for (HashSet<RefPtr<Widget> >::iterator it = m_children.begin(); it != end; ++it) |
| (*it)->setParentVisible(false); |
| } |
| setSelfVisible(false); |
| } |
| |
| Widget::hide(); |
| } |
| |
| bool ScrollView::isOffscreen() const |
| { |
| if (platformWidget()) |
| return platformIsOffscreen(); |
| |
| if (!isVisible()) |
| return true; |
| |
| // FIXME: Add a HostWindow::isOffscreen method here. Since only Mac implements this method |
| // currently, we can add the method when the other platforms decide to implement this concept. |
| return false; |
| } |
| |
| |
| void ScrollView::addPanScrollIcon(const IntPoint& iconPosition) |
| { |
| if (!hostWindow()) |
| return; |
| m_drawPanScrollIcon = true; |
| m_panScrollIconPoint = IntPoint(iconPosition.x() - panIconSizeLength / 2 , iconPosition.y() - panIconSizeLength / 2) ; |
| hostWindow()->repaint(IntRect(m_panScrollIconPoint, IntSize(panIconSizeLength,panIconSizeLength)), true, true); |
| } |
| |
| void ScrollView::removePanScrollIcon() |
| { |
| if (!hostWindow()) |
| return; |
| m_drawPanScrollIcon = false; |
| hostWindow()->repaint(IntRect(m_panScrollIconPoint, IntSize(panIconSizeLength, panIconSizeLength)), true, true); |
| } |
| |
| #if !PLATFORM(WX) && !PLATFORM(GTK) && !PLATFORM(QT) |
| |
| void ScrollView::platformInit() |
| { |
| } |
| |
| void ScrollView::platformDestroy() |
| { |
| } |
| |
| #endif |
| |
| #if !PLATFORM(WX) && !PLATFORM(GTK) && !PLATFORM(QT) && !PLATFORM(MAC) |
| |
| void ScrollView::platformAddChild(Widget*) |
| { |
| } |
| |
| void ScrollView::platformRemoveChild(Widget*) |
| { |
| } |
| |
| #endif |
| |
| #if !PLATFORM(MAC) |
| |
| void ScrollView::platformSetScrollbarsSuppressed(bool) |
| { |
| } |
| |
| #endif |
| |
| #if !PLATFORM(MAC) && !PLATFORM(WX) |
| |
| #if !PLATFORM(ANDROID) |
| void ScrollView::platformSetScrollbarModes() |
| { |
| } |
| |
| void ScrollView::platformScrollbarModes(ScrollbarMode& horizontal, ScrollbarMode& vertical) const |
| { |
| horizontal = ScrollbarAuto; |
| vertical = ScrollbarAuto; |
| } |
| #endif |
| |
| void ScrollView::platformSetCanBlitOnScroll(bool) |
| { |
| } |
| |
| bool ScrollView::platformCanBlitOnScroll() const |
| { |
| return false; |
| } |
| |
| #if !PLATFORM(ANDROID) |
| IntRect ScrollView::platformVisibleContentRect(bool) const |
| { |
| return IntRect(); |
| } |
| #endif |
| |
| #if !PLATFORM(ANDROID) |
| IntSize ScrollView::platformContentsSize() const |
| { |
| return IntSize(); |
| } |
| #endif |
| |
| void ScrollView::platformSetContentsSize() |
| { |
| } |
| |
| IntRect ScrollView::platformContentsToScreen(const IntRect& rect) const |
| { |
| return rect; |
| } |
| |
| IntPoint ScrollView::platformScreenToContents(const IntPoint& point) const |
| { |
| return point; |
| } |
| |
| #if !PLATFORM(ANDROID) |
| void ScrollView::platformSetScrollPosition(const IntPoint&) |
| { |
| } |
| #endif |
| |
| bool ScrollView::platformScroll(ScrollDirection, ScrollGranularity) |
| { |
| return true; |
| } |
| |
| #if !PLATFORM(ANDROID) |
| void ScrollView::platformRepaintContentRectangle(const IntRect&, bool /*now*/) |
| { |
| } |
| |
| #ifdef ANDROID_CAPTURE_OFFSCREEN_PAINTS |
| void ScrollView::platformOffscreenContentRectangle(const IntRect& ) |
| { |
| } |
| #endif |
| #endif |
| |
| bool ScrollView::platformIsOffscreen() const |
| { |
| return false; |
| } |
| |
| #endif |
| |
| } |
| |
