The Tor Browser: comparison layout/xul/nsListBoxLayout.cpp

--1:000000000000
+:e810af5dbf29
+/* -*- 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 "nsListBoxLayout.h"
+#include "nsListBoxBodyFrame.h"
+#include "nsBox.h"
+#include "nsBoxLayoutState.h"
+#include "nsIScrollableFrame.h"
+#include "nsIReflowCallback.h"
+#include "nsNameSpaceManager.h"
+#include "nsGkAtoms.h"
+#include "nsContentUtils.h"
+nsListBoxLayout::nsListBoxLayout() : nsGridRowGroupLayout()
+{
+}
+////////// nsBoxLayout //////////////
+nsSize
+nsListBoxLayout::GetPrefSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState)
+{
+nsSize pref = nsGridRowGroupLayout::GetPrefSize(aBox, aBoxLayoutState);
+nsListBoxBodyFrame* frame = static_cast<nsListBoxBodyFrame*>(aBox);
+if (frame) {
+nscoord rowheight = frame->GetRowHeightAppUnits();
+pref.height = frame->GetRowCount() * rowheight;
+// Pad the height.
+nscoord y = frame->GetAvailableHeight();
+if (pref.height > y && y > 0 && rowheight > 0) {
+nscoord m = (pref.height-y)%rowheight;
+nscoord remainder = m == 0 ? 0 : rowheight - m;
+pref.height += remainder;
+}
+if (nsContentUtils::HasNonEmptyAttr(frame->GetContent(), kNameSpaceID_None,
+nsGkAtoms::sizemode)) {
+nscoord width = frame->ComputeIntrinsicWidth(aBoxLayoutState);
+if (width > pref.width)
+pref.width = width;
+}
+}
+return pref;
+}
+nsSize
+nsListBoxLayout::GetMinSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState)
+{
+nsSize minSize = nsGridRowGroupLayout::GetMinSize(aBox, aBoxLayoutState);
+nsListBoxBodyFrame* frame = static_cast<nsListBoxBodyFrame*>(aBox);
+if (frame) {
+nscoord rowheight = frame->GetRowHeightAppUnits();
+minSize.height = frame->GetRowCount() * rowheight;
+// Pad the height.
+nscoord y = frame->GetAvailableHeight();
+if (minSize.height > y && y > 0 && rowheight > 0) {
+nscoord m = (minSize.height-y)%rowheight;
+nscoord remainder = m == 0 ? 0 : rowheight - m;
+minSize.height += remainder;
+}
+if (nsContentUtils::HasNonEmptyAttr(frame->GetContent(), kNameSpaceID_None,
+nsGkAtoms::sizemode)) {
+nscoord width = frame->ComputeIntrinsicWidth(aBoxLayoutState);
+if (width > minSize.width)
+minSize.width = width;
+}
+}
+return minSize;
+}
+nsSize
+nsListBoxLayout::GetMaxSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState)
+{
+nsSize maxSize = nsGridRowGroupLayout::GetMaxSize(aBox, aBoxLayoutState);
+nsListBoxBodyFrame* frame = static_cast<nsListBoxBodyFrame*>(aBox);
+if (frame) {
+nscoord rowheight = frame->GetRowHeightAppUnits();
+maxSize.height = frame->GetRowCount() * rowheight;
+// Pad the height.
+nscoord y = frame->GetAvailableHeight();
+if (maxSize.height > y && y > 0 && rowheight > 0) {
+nscoord m = (maxSize.height-y)%rowheight;
+nscoord remainder = m == 0 ? 0 : rowheight - m;
+maxSize.height += remainder;
+}
+}
+return maxSize;
+}
+NS_IMETHODIMP
+nsListBoxLayout::Layout(nsIFrame* aBox, nsBoxLayoutState& aState)
+{
+return LayoutInternal(aBox, aState);
+}
+/////////// nsListBoxLayout /////////////////////////
+/**
+* Called to layout our our children. Does no frame construction
+*/
+NS_IMETHODIMP
+nsListBoxLayout::LayoutInternal(nsIFrame* aBox, nsBoxLayoutState& aState)
+{
+int32_t redrawStart = -1;
+// Get the start y position.
+nsListBoxBodyFrame* body = static_cast<nsListBoxBodyFrame*>(aBox);
+if (!body) {
+NS_ERROR("Frame encountered that isn't a listboxbody!");
+return NS_ERROR_FAILURE;
+}
+nsMargin margin;
+// Get our client rect.
+nsRect clientRect;
+aBox->GetClientRect(clientRect);
+// Get the starting y position and the remaining available
+// height.
+nscoord availableHeight = body->GetAvailableHeight();
+nscoord yOffset = body->GetYPosition();
+if (availableHeight <= 0) {
+bool fixed = (body->GetFixedRowSize() != -1);
+if (fixed)
+availableHeight = 10;
+else
+return NS_OK;
+}
+// run through all our currently created children
+nsIFrame* box = body->GetChildBox();
+// if the reason is resize or initial we must relayout.
+nscoord rowHeight = body->GetRowHeightAppUnits();
+while (box) {
+// If this box is dirty or if it has dirty children, we
+// call layout on it.
+nsRect childRect(box->GetRect());
+box->GetMargin(margin);
+// relayout if we must or we are dirty or some of our children are dirty
+//   or the client area is wider than us
+// XXXldb There should probably be a resize check here too!
+if (NS_SUBTREE_DIRTY(box) || childRect.width < clientRect.width) {
+childRect.x = 0;
+childRect.y = yOffset;
+childRect.width = clientRect.width;
+nsSize size = box->GetPrefSize(aState);
+body->SetRowHeight(size.height);
+childRect.height = rowHeight;
+childRect.Deflate(margin);
+box->SetBounds(aState, childRect);
+box->Layout(aState);
+} else {
+// if the child did not need to be relayed out. Then its easy.
+// Place the child by just grabbing its rect and adjusting the y.
+int32_t newPos = yOffset+margin.top;
+// are we pushing down or pulling up any rows?
+// Then we may have to redraw everything below the moved
+// rows.
+if (redrawStart == -1 && childRect.y != newPos)
+redrawStart = newPos;
+childRect.y = newPos;
+box->SetBounds(aState, childRect);
+}
+// Ok now the available size gets smaller and we move the
+// starting position of the next child down some.
+nscoord size = childRect.height + margin.top + margin.bottom;
+yOffset += size;
+availableHeight -= size;
+box = box->GetNextBox();
+}
+// We have enough available height left to add some more rows
+// Since we can't do this during layout, we post a callback
+// that will be processed after the reflow completes.
+body->PostReflowCallback();
+// if rows were pushed down or pulled up because some rows were added
+// before them then redraw everything under the inserted rows. The inserted
+// rows will automatically be redrawn because the were marked dirty on insertion.
+if (redrawStart > -1) {
+aBox->Redraw(aState);
+}
+return NS_OK;
+}
+// Creation Routines ///////////////////////////////////////////////////////////////////////
+already_AddRefed<nsBoxLayout> NS_NewListBoxLayout()
+{
+nsRefPtr<nsBoxLayout> layout = new nsListBoxLayout();
+return layout.forget();
+}

The Tor Browser / file comparison

comparison: layout/xul/nsListBoxLayout.cpp

layout/xul/nsListBoxLayout.cpp