mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
385 lines
10 KiB
C++
385 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "mozilla/dom/ScrollBoxObject.h"
|
|
#include "mozilla/dom/ScrollBoxObjectBinding.h"
|
|
#include "mozilla/dom/Element.h"
|
|
#include "mozilla/dom/ToJSValue.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIPresShell.h"
|
|
#include "nsIContent.h"
|
|
#include "nsIDOMElement.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsBox.h"
|
|
#include "nsIScrollableFrame.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
ScrollBoxObject::ScrollBoxObject()
|
|
{
|
|
}
|
|
|
|
ScrollBoxObject::~ScrollBoxObject()
|
|
{
|
|
}
|
|
|
|
JSObject* ScrollBoxObject::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
|
|
{
|
|
return ScrollBoxObjectBinding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
nsIScrollableFrame* ScrollBoxObject::GetScrollFrame()
|
|
{
|
|
return do_QueryFrame(GetFrame(false));
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollTo(int32_t x, int32_t y, ErrorResult& aRv)
|
|
{
|
|
nsIScrollableFrame* sf = GetScrollFrame();
|
|
if (!sf) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
sf->ScrollToCSSPixels(CSSIntPoint(x, y));
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollBy(int32_t dx, int32_t dy, ErrorResult& aRv)
|
|
{
|
|
CSSIntPoint pt;
|
|
GetPosition(pt, aRv);
|
|
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
ScrollTo(pt.x + dx, pt.y + dy, aRv);
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollByLine(int32_t dlines, ErrorResult& aRv)
|
|
{
|
|
nsIScrollableFrame* sf = GetScrollFrame();
|
|
if (!sf) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
sf->ScrollBy(nsIntPoint(0, dlines), nsIScrollableFrame::LINES,
|
|
nsIScrollableFrame::SMOOTH);
|
|
}
|
|
|
|
// XUL <scrollbox> elements have a single box child element.
|
|
// Get a pointer to that box.
|
|
// Note that now that the <scrollbox> is just a regular box
|
|
// with 'overflow:hidden', the boxobject's frame is an nsXULScrollFrame,
|
|
// the <scrollbox>'s box frame is the scrollframe's "scrolled frame", and
|
|
// the <scrollbox>'s child box is a child of that.
|
|
static nsIFrame* GetScrolledBox(BoxObject* aScrollBox) {
|
|
nsIFrame* frame = aScrollBox->GetFrame(false);
|
|
if (!frame) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
|
|
if (!scrollFrame) {
|
|
NS_WARNING("ScrollBoxObject attached to something that's not a scroll frame!");
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame* scrolledFrame = scrollFrame->GetScrolledFrame();
|
|
if (!scrolledFrame)
|
|
return nullptr;
|
|
return nsBox::GetChildBox(scrolledFrame);
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollByIndex(int32_t dindexes, ErrorResult& aRv)
|
|
{
|
|
nsIScrollableFrame* sf = GetScrollFrame();
|
|
if (!sf) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
nsIFrame* scrolledBox = GetScrolledBox(this);
|
|
if (!scrolledBox) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
nsRect rect;
|
|
|
|
// now get the scrolled boxes first child.
|
|
nsIFrame* child = nsBox::GetChildBox(scrolledBox);
|
|
|
|
bool horiz = scrolledBox->IsHorizontal();
|
|
nsPoint cp = sf->GetScrollPosition();
|
|
nscoord diff = 0;
|
|
int32_t curIndex = 0;
|
|
bool isLTR = scrolledBox->IsNormalDirection();
|
|
|
|
int32_t frameWidth = 0;
|
|
if (!isLTR && horiz) {
|
|
GetWidth(&frameWidth);
|
|
nsCOMPtr<nsIPresShell> shell = GetPresShell(false);
|
|
if (!shell) {
|
|
aRv.Throw(NS_ERROR_UNEXPECTED);
|
|
return;
|
|
}
|
|
frameWidth = nsPresContext::CSSPixelsToAppUnits(frameWidth);
|
|
}
|
|
|
|
// first find out what index we are currently at
|
|
while(child) {
|
|
rect = child->GetRect();
|
|
if (horiz) {
|
|
// In the left-to-right case we break from the loop when the center of
|
|
// the current child rect is greater than the scrolled position of
|
|
// the left edge of the scrollbox
|
|
// In the right-to-left case we break when the center of the current
|
|
// child rect is less than the scrolled position of the right edge of
|
|
// the scrollbox.
|
|
diff = rect.x + rect.width/2; // use the center, to avoid rounding errors
|
|
if ((isLTR && diff > cp.x) ||
|
|
(!isLTR && diff < cp.x + frameWidth)) {
|
|
break;
|
|
}
|
|
} else {
|
|
diff = rect.y + rect.height/2;// use the center, to avoid rounding errors
|
|
if (diff > cp.y) {
|
|
break;
|
|
}
|
|
}
|
|
child = nsBox::GetNextBox(child);
|
|
curIndex++;
|
|
}
|
|
|
|
int32_t count = 0;
|
|
|
|
if (dindexes == 0)
|
|
return;
|
|
|
|
if (dindexes > 0) {
|
|
while(child) {
|
|
child = nsBox::GetNextBox(child);
|
|
if (child) {
|
|
rect = child->GetRect();
|
|
}
|
|
count++;
|
|
if (count >= dindexes) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else if (dindexes < 0) {
|
|
child = nsBox::GetChildBox(scrolledBox);
|
|
while(child) {
|
|
rect = child->GetRect();
|
|
if (count >= curIndex + dindexes) {
|
|
break;
|
|
}
|
|
|
|
count++;
|
|
child = nsBox::GetNextBox(child);
|
|
|
|
}
|
|
}
|
|
|
|
nscoord csspixel = nsPresContext::CSSPixelsToAppUnits(1);
|
|
if (horiz) {
|
|
// In the left-to-right case we scroll so that the left edge of the
|
|
// selected child is scrolled to the left edge of the scrollbox.
|
|
// In the right-to-left case we scroll so that the right edge of the
|
|
// selected child is scrolled to the right edge of the scrollbox.
|
|
|
|
nsPoint pt(isLTR ? rect.x : rect.x + rect.width - frameWidth,
|
|
cp.y);
|
|
|
|
// Use a destination range that ensures the left edge (or right edge,
|
|
// for RTL) will indeed be visible. Also ensure that the top edge
|
|
// is visible.
|
|
nsRect range(pt.x, pt.y, csspixel, 0);
|
|
if (isLTR) {
|
|
range.x -= csspixel;
|
|
}
|
|
sf->ScrollTo(pt, nsIScrollableFrame::INSTANT, &range);
|
|
} else {
|
|
// Use a destination range that ensures the top edge will be visible.
|
|
nsRect range(cp.x, rect.y - csspixel, 0, csspixel);
|
|
sf->ScrollTo(nsPoint(cp.x, rect.y), nsIScrollableFrame::INSTANT, &range);
|
|
}
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollToLine(int32_t line, ErrorResult& aRv)
|
|
{
|
|
nsIScrollableFrame* sf = GetScrollFrame();
|
|
if (!sf) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
nscoord y = sf->GetLineScrollAmount().height * line;
|
|
nsRect range(0, y - nsPresContext::CSSPixelsToAppUnits(1),
|
|
0, nsPresContext::CSSPixelsToAppUnits(1));
|
|
sf->ScrollTo(nsPoint(0, y), nsIScrollableFrame::INSTANT, &range);
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollToElement(Element& child, ErrorResult& aRv)
|
|
{
|
|
nsCOMPtr<nsIPresShell> shell = GetPresShell(false);
|
|
if (!shell) {
|
|
aRv.Throw(NS_ERROR_UNEXPECTED);
|
|
return;
|
|
}
|
|
|
|
shell->ScrollContentIntoView(&child,
|
|
nsIPresShell::ScrollAxis(
|
|
nsIPresShell::SCROLL_TOP,
|
|
nsIPresShell::SCROLL_ALWAYS),
|
|
nsIPresShell::ScrollAxis(
|
|
nsIPresShell::SCROLL_LEFT,
|
|
nsIPresShell::SCROLL_ALWAYS),
|
|
nsIPresShell::SCROLL_FIRST_ANCESTOR_ONLY |
|
|
nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
|
|
}
|
|
|
|
void ScrollBoxObject::ScrollToIndex(int32_t index, ErrorResult& aRv)
|
|
{
|
|
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
int32_t ScrollBoxObject::GetPositionX(ErrorResult& aRv)
|
|
{
|
|
CSSIntPoint pt;
|
|
GetPosition(pt, aRv);
|
|
return pt.x;
|
|
}
|
|
|
|
int32_t ScrollBoxObject::GetPositionY(ErrorResult& aRv)
|
|
{
|
|
CSSIntPoint pt;
|
|
GetPosition(pt, aRv);
|
|
return pt.y;
|
|
}
|
|
|
|
int32_t ScrollBoxObject::GetScrolledWidth(ErrorResult& aRv)
|
|
{
|
|
nsRect scrollRect;
|
|
GetScrolledSize(scrollRect, aRv);
|
|
return scrollRect.width;
|
|
}
|
|
|
|
int32_t ScrollBoxObject::GetScrolledHeight(ErrorResult& aRv)
|
|
{
|
|
nsRect scrollRect;
|
|
GetScrolledSize(scrollRect, aRv);
|
|
return scrollRect.height;
|
|
}
|
|
|
|
/* private helper */
|
|
void ScrollBoxObject::GetPosition(CSSIntPoint& aPos, ErrorResult& aRv)
|
|
{
|
|
nsIScrollableFrame* sf = GetScrollFrame();
|
|
if (!sf) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
aPos = sf->GetScrollPositionCSSPixels();
|
|
}
|
|
|
|
/* private helper */
|
|
void ScrollBoxObject::GetScrolledSize(nsRect& aRect, ErrorResult& aRv)
|
|
{
|
|
nsIFrame* scrolledBox = GetScrolledBox(this);
|
|
if (!scrolledBox) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
aRect = scrolledBox->GetRect();
|
|
aRect.width = nsPresContext::AppUnitsToIntCSSPixels(aRect.width);
|
|
aRect.height = nsPresContext::AppUnitsToIntCSSPixels(aRect.height);
|
|
}
|
|
|
|
void ScrollBoxObject::GetPosition(JSContext* cx,
|
|
JS::Handle<JSObject*> x,
|
|
JS::Handle<JSObject*> y,
|
|
ErrorResult& aRv)
|
|
{
|
|
CSSIntPoint pt;
|
|
GetPosition(pt, aRv);
|
|
JS::Rooted<JS::Value> v(cx);
|
|
if (!ToJSValue(cx, pt.x, &v) ||
|
|
!JS_SetProperty(cx, x, "value", v)) {
|
|
aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
|
|
return;
|
|
}
|
|
if (!ToJSValue(cx, pt.y, &v) ||
|
|
!JS_SetProperty(cx, y, "value", v)) {
|
|
aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void ScrollBoxObject::GetScrolledSize(JSContext* cx,
|
|
JS::Handle<JSObject*> width,
|
|
JS::Handle<JSObject*> height,
|
|
ErrorResult& aRv)
|
|
{
|
|
nsRect rect;
|
|
GetScrolledSize(rect, aRv);
|
|
JS::Rooted<JS::Value> v(cx);
|
|
if (!ToJSValue(cx, rect.width, &v) ||
|
|
!JS_SetProperty(cx, width, "value", v)) {
|
|
aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
|
|
return;
|
|
}
|
|
if (!ToJSValue(cx, rect.height, &v) ||
|
|
!JS_SetProperty(cx, height, "value", v)) {
|
|
aRv.Throw(NS_ERROR_XPC_CANT_SET_OUT_VAL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void ScrollBoxObject::EnsureElementIsVisible(Element& child, ErrorResult& aRv)
|
|
{
|
|
nsCOMPtr<nsIPresShell> shell = GetPresShell(false);
|
|
if (!shell) {
|
|
aRv.Throw(NS_ERROR_UNEXPECTED);
|
|
return;
|
|
}
|
|
|
|
shell->ScrollContentIntoView(&child,
|
|
nsIPresShell::ScrollAxis(),
|
|
nsIPresShell::ScrollAxis(),
|
|
nsIPresShell::SCROLL_FIRST_ANCESTOR_ONLY |
|
|
nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
|
|
}
|
|
|
|
void ScrollBoxObject::EnsureIndexIsVisible(int32_t index, ErrorResult& aRv)
|
|
{
|
|
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
void ScrollBoxObject::EnsureLineIsVisible(int32_t line, ErrorResult& aRv)
|
|
{
|
|
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
// Creation Routine ///////////////////////////////////////////////////////////////////////
|
|
|
|
using namespace mozilla::dom;
|
|
|
|
nsresult
|
|
NS_NewScrollBoxObject(nsIBoxObject** aResult)
|
|
{
|
|
NS_ADDREF(*aResult = new ScrollBoxObject());
|
|
return NS_OK;
|
|
}
|