73681d08ee
This is a manual subset of changes written with sed, over .h and .cpp files in layout/. This also renames a static method on nsSprocketLayout. Note that nsFlexContainerFrame and nsRangeFrame also have IsHorizontal methods that are not renamed here, but this can be found to be relatively safe because none of the IsHorizontal methods are virtual. MozReview-Commit-ID: Jsdy7I4Q7mX
385 lines
10 KiB
C++
385 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ScrollBoxObject.h"
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#include "mozilla/dom/ScrollBoxObjectBinding.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/ToJSValue.h"
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#include "nsCOMPtr.h"
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#include "nsIPresShell.h"
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#include "nsIContent.h"
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#include "nsIDOMElement.h"
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#include "nsPresContext.h"
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#include "nsBox.h"
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#include "nsIScrollableFrame.h"
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namespace mozilla {
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namespace dom {
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ScrollBoxObject::ScrollBoxObject()
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{
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}
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ScrollBoxObject::~ScrollBoxObject()
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{
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}
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JSObject* ScrollBoxObject::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return ScrollBoxObjectBinding::Wrap(aCx, this, aGivenProto);
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}
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nsIScrollableFrame* ScrollBoxObject::GetScrollFrame()
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{
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return do_QueryFrame(GetFrame(false));
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}
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void ScrollBoxObject::ScrollTo(int32_t x, int32_t y, ErrorResult& aRv)
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{
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nsIScrollableFrame* sf = GetScrollFrame();
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if (!sf) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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sf->ScrollToCSSPixels(CSSIntPoint(x, y));
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}
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void ScrollBoxObject::ScrollBy(int32_t dx, int32_t dy, ErrorResult& aRv)
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{
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CSSIntPoint pt;
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GetPosition(pt, aRv);
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if (aRv.Failed()) {
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return;
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}
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ScrollTo(pt.x + dx, pt.y + dy, aRv);
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}
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void ScrollBoxObject::ScrollByLine(int32_t dlines, ErrorResult& aRv)
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{
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nsIScrollableFrame* sf = GetScrollFrame();
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if (!sf) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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sf->ScrollBy(nsIntPoint(0, dlines), nsIScrollableFrame::LINES,
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nsIScrollableFrame::SMOOTH);
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}
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// XUL <scrollbox> elements have a single box child element.
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// Get a pointer to that box.
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// Note that now that the <scrollbox> is just a regular box
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// with 'overflow:hidden', the boxobject's frame is an nsXULScrollFrame,
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// the <scrollbox>'s box frame is the scrollframe's "scrolled frame", and
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// the <scrollbox>'s child box is a child of that.
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static nsIFrame* GetScrolledBox(BoxObject* aScrollBox) {
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nsIFrame* frame = aScrollBox->GetFrame(false);
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if (!frame) {
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return nullptr;
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}
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nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
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if (!scrollFrame) {
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NS_WARNING("ScrollBoxObject attached to something that's not a scroll frame!");
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return nullptr;
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}
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nsIFrame* scrolledFrame = scrollFrame->GetScrolledFrame();
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if (!scrolledFrame)
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return nullptr;
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return nsBox::GetChildXULBox(scrolledFrame);
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}
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void ScrollBoxObject::ScrollByIndex(int32_t dindexes, ErrorResult& aRv)
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{
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nsIScrollableFrame* sf = GetScrollFrame();
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if (!sf) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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nsIFrame* scrolledBox = GetScrolledBox(this);
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if (!scrolledBox) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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nsRect rect;
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// now get the scrolled boxes first child.
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nsIFrame* child = nsBox::GetChildXULBox(scrolledBox);
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bool horiz = scrolledBox->IsXULHorizontal();
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nsPoint cp = sf->GetScrollPosition();
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nscoord diff = 0;
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int32_t curIndex = 0;
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bool isLTR = scrolledBox->IsNormalDirection();
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int32_t frameWidth = 0;
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if (!isLTR && horiz) {
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GetWidth(&frameWidth);
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nsCOMPtr<nsIPresShell> shell = GetPresShell(false);
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if (!shell) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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frameWidth = nsPresContext::CSSPixelsToAppUnits(frameWidth);
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}
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// first find out what index we are currently at
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while(child) {
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rect = child->GetRect();
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if (horiz) {
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// In the left-to-right case we break from the loop when the center of
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// the current child rect is greater than the scrolled position of
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// the left edge of the scrollbox
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// In the right-to-left case we break when the center of the current
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// child rect is less than the scrolled position of the right edge of
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// the scrollbox.
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diff = rect.x + rect.width/2; // use the center, to avoid rounding errors
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if ((isLTR && diff > cp.x) ||
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(!isLTR && diff < cp.x + frameWidth)) {
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break;
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}
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} else {
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diff = rect.y + rect.height/2;// use the center, to avoid rounding errors
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if (diff > cp.y) {
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break;
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}
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}
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child = nsBox::GetNextXULBox(child);
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curIndex++;
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}
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int32_t count = 0;
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if (dindexes == 0)
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return;
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if (dindexes > 0) {
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while(child) {
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child = nsBox::GetNextXULBox(child);
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if (child) {
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rect = child->GetRect();
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}
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count++;
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if (count >= dindexes) {
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break;
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}
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}
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} else if (dindexes < 0) {
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child = nsBox::GetChildXULBox(scrolledBox);
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while(child) {
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rect = child->GetRect();
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if (count >= curIndex + dindexes) {
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break;
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}
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count++;
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child = nsBox::GetNextXULBox(child);
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}
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}
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nscoord csspixel = nsPresContext::CSSPixelsToAppUnits(1);
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if (horiz) {
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// In the left-to-right case we scroll so that the left edge of the
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// selected child is scrolled to the left edge of the scrollbox.
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// In the right-to-left case we scroll so that the right edge of the
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// selected child is scrolled to the right edge of the scrollbox.
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nsPoint pt(isLTR ? rect.x : rect.x + rect.width - frameWidth,
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cp.y);
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// Use a destination range that ensures the left edge (or right edge,
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// for RTL) will indeed be visible. Also ensure that the top edge
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// is visible.
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nsRect range(pt.x, pt.y, csspixel, 0);
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if (isLTR) {
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range.x -= csspixel;
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}
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sf->ScrollTo(pt, nsIScrollableFrame::INSTANT, &range);
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} else {
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// Use a destination range that ensures the top edge will be visible.
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nsRect range(cp.x, rect.y - csspixel, 0, csspixel);
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sf->ScrollTo(nsPoint(cp.x, rect.y), nsIScrollableFrame::INSTANT, &range);
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}
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}
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void ScrollBoxObject::ScrollToLine(int32_t line, ErrorResult& aRv)
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{
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nsIScrollableFrame* sf = GetScrollFrame();
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if (!sf) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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nscoord y = sf->GetLineScrollAmount().height * line;
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nsRect range(0, y - nsPresContext::CSSPixelsToAppUnits(1),
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0, nsPresContext::CSSPixelsToAppUnits(1));
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sf->ScrollTo(nsPoint(0, y), nsIScrollableFrame::INSTANT, &range);
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}
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void ScrollBoxObject::ScrollToElement(Element& child, ErrorResult& aRv)
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{
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nsCOMPtr<nsIPresShell> shell = GetPresShell(false);
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if (!shell) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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shell->ScrollContentIntoView(&child,
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nsIPresShell::ScrollAxis(
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nsIPresShell::SCROLL_TOP,
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nsIPresShell::SCROLL_ALWAYS),
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nsIPresShell::ScrollAxis(
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nsIPresShell::SCROLL_LEFT,
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nsIPresShell::SCROLL_ALWAYS),
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nsIPresShell::SCROLL_FIRST_ANCESTOR_ONLY |
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nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
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}
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void ScrollBoxObject::ScrollToIndex(int32_t index, ErrorResult& aRv)
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{
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aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
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}
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int32_t ScrollBoxObject::GetPositionX(ErrorResult& aRv)
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{
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CSSIntPoint pt;
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GetPosition(pt, aRv);
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return pt.x;
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}
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int32_t ScrollBoxObject::GetPositionY(ErrorResult& aRv)
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{
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CSSIntPoint pt;
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GetPosition(pt, aRv);
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return pt.y;
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}
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int32_t ScrollBoxObject::GetScrolledWidth(ErrorResult& aRv)
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{
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nsRect scrollRect;
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GetScrolledSize(scrollRect, aRv);
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return scrollRect.width;
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}
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int32_t ScrollBoxObject::GetScrolledHeight(ErrorResult& aRv)
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{
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nsRect scrollRect;
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GetScrolledSize(scrollRect, aRv);
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return scrollRect.height;
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}
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/* private helper */
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void ScrollBoxObject::GetPosition(CSSIntPoint& aPos, ErrorResult& aRv)
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{
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nsIScrollableFrame* sf = GetScrollFrame();
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if (!sf) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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aPos = sf->GetScrollPositionCSSPixels();
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}
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/* private helper */
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void ScrollBoxObject::GetScrolledSize(nsRect& aRect, ErrorResult& aRv)
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{
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nsIFrame* scrolledBox = GetScrolledBox(this);
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if (!scrolledBox) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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aRect = scrolledBox->GetRect();
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aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
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aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
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}
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void ScrollBoxObject::GetPosition(JSContext* cx,
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JS::Handle<JSObject*> x,
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JS::Handle<JSObject*> y,
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ErrorResult& aRv)
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{
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CSSIntPoint pt;
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GetPosition(pt, aRv);
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JS::Rooted<JS::Value> v(cx);
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if (!ToJSValue(cx, pt.x, &v) ||
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!JS_SetProperty(cx, x, "value", v)) {
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aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
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return;
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}
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if (!ToJSValue(cx, pt.y, &v) ||
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!JS_SetProperty(cx, y, "value", v)) {
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aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
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return;
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}
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}
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void ScrollBoxObject::GetScrolledSize(JSContext* cx,
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JS::Handle<JSObject*> width,
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JS::Handle<JSObject*> height,
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ErrorResult& aRv)
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{
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nsRect rect;
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GetScrolledSize(rect, aRv);
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JS::Rooted<JS::Value> v(cx);
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if (!ToJSValue(cx, rect.width, &v) ||
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!JS_SetProperty(cx, width, "value", v)) {
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aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
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return;
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}
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if (!ToJSValue(cx, rect.height, &v) ||
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!JS_SetProperty(cx, height, "value", v)) {
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aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
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return;
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}
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}
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void ScrollBoxObject::EnsureElementIsVisible(Element& child, ErrorResult& aRv)
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{
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nsCOMPtr<nsIPresShell> shell = GetPresShell(false);
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if (!shell) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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shell->ScrollContentIntoView(&child,
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nsIPresShell::ScrollAxis(),
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nsIPresShell::ScrollAxis(),
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nsIPresShell::SCROLL_FIRST_ANCESTOR_ONLY |
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nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
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}
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void ScrollBoxObject::EnsureIndexIsVisible(int32_t index, ErrorResult& aRv)
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{
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aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
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}
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void ScrollBoxObject::EnsureLineIsVisible(int32_t line, ErrorResult& aRv)
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{
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aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
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}
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} // namespace dom
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} // namespace mozilla
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// Creation Routine ///////////////////////////////////////////////////////////////////////
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using namespace mozilla::dom;
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nsresult
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NS_NewScrollBoxObject(nsIBoxObject** aResult)
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{
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NS_ADDREF(*aResult = new ScrollBoxObject());
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return NS_OK;
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}
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