1 files changed, 250 insertions, 0 deletions
diff --git a/layout/forms/nsProgressFrame.cpp b/layout/forms/nsProgressFrame.cpp
new file mode 100644
index 0000000000..2f0d727473
--- /dev/null
+++ b/layout/forms/nsProgressFrame.cpp
@@ -0,0 +1,250 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "nsProgressFrame.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLProgressElement.h"
+#include "nsIContent.h"
+#include "nsLayoutUtils.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsNodeInfoManager.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsFontMetrics.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsIFrame* NS_NewProgressFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell) nsProgressFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsProgressFrame)
+
+nsProgressFrame::nsProgressFrame(ComputedStyle* aStyle,
+                                 nsPresContext* aPresContext)
+    : nsContainerFrame(aStyle, aPresContext, kClassID), mBarDiv(nullptr) {}
+
+nsProgressFrame::~nsProgressFrame() = default;
+
+void nsProgressFrame::Destroy(DestroyContext& aContext) {
+  NS_ASSERTION(!GetPrevContinuation(),
+               "nsProgressFrame should not have continuations; if it does we "
+               "need to call RegUnregAccessKey only for the first.");
+  aContext.AddAnonymousContent(mBarDiv.forget());
+  nsContainerFrame::Destroy(aContext);
+}
+
+nsresult nsProgressFrame::CreateAnonymousContent(
+    nsTArray<ContentInfo>& aElements) {
+  // Create the progress bar div.
+  nsCOMPtr<Document> doc = mContent->GetComposedDoc();
+  mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
+
+  // Associate ::-moz-progress-bar pseudo-element to the anonymous child.
+  if (StaticPrefs::layout_css_modern_range_pseudos_enabled()) {
+    // TODO(emilio): Create also a slider-track pseudo-element.
+    mBarDiv->SetPseudoElementType(PseudoStyleType::sliderFill);
+  } else {
+    mBarDiv->SetPseudoElementType(PseudoStyleType::mozProgressBar);
+  }
+
+  // XXX(Bug 1631371) Check if this should use a fallible operation as it
+  // pretended earlier, or change the return type to void.
+  aElements.AppendElement(mBarDiv);
+
+  return NS_OK;
+}
+
+void nsProgressFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                               uint32_t aFilter) {
+  if (mBarDiv) {
+    aElements.AppendElement(mBarDiv);
+  }
+}
+
+NS_QUERYFRAME_HEAD(nsProgressFrame)
+  NS_QUERYFRAME_ENTRY(nsProgressFrame)
+  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+void nsProgressFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                       const nsDisplayListSet& aLists) {
+  BuildDisplayListForInline(aBuilder, aLists);
+}
+
+void nsProgressFrame::Reflow(nsPresContext* aPresContext,
+                             ReflowOutput& aDesiredSize,
+                             const ReflowInput& aReflowInput,
+                             nsReflowStatus& aStatus) {
+  MarkInReflow();
+  DO_GLOBAL_REFLOW_COUNT("nsProgressFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+  NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
+  NS_ASSERTION(
+      PrincipalChildList().GetLength() == 1 &&
+          PrincipalChildList().FirstChild() == mBarDiv->GetPrimaryFrame(),
+      "unexpected child frames");
+  NS_ASSERTION(!GetPrevContinuation(),
+               "nsProgressFrame should not have continuations; if it does we "
+               "need to call RegUnregAccessKey only for the first.");
+
+  const auto wm = aReflowInput.GetWritingMode();
+  aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
+  aDesiredSize.SetOverflowAreasToDesiredBounds();
+
+  for (auto childFrame : PrincipalChildList()) {
+    ReflowChildFrame(childFrame, aPresContext, aReflowInput, aStatus);
+    ConsiderChildOverflow(aDesiredSize.mOverflowAreas, childFrame);
+  }
+
+  FinishAndStoreOverflow(&aDesiredSize);
+
+  aStatus.Reset();  // This type of frame can't be split.
+}
+
+void nsProgressFrame::ReflowChildFrame(nsIFrame* aChild,
+                                       nsPresContext* aPresContext,
+                                       const ReflowInput& aReflowInput,
+                                       nsReflowStatus& aStatus) {
+  bool vertical = ResolvedOrientationIsVertical();
+  WritingMode wm = aChild->GetWritingMode();
+  LogicalSize availSize = aReflowInput.ComputedSize(wm);
+  availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+  ReflowInput reflowInput(aPresContext, aReflowInput, aChild, availSize);
+  nscoord size =
+      vertical ? aReflowInput.ComputedHeight() : aReflowInput.ComputedWidth();
+  nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
+  nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;
+
+  double position = static_cast<HTMLProgressElement*>(GetContent())->Position();
+
+  // Force the bar's size to match the current progress.
+  // When indeterminate, the progress' size will be 100%.
+  if (position >= 0.0) {
+    size *= position;
+  }
+
+  if (!vertical && wm.IsPhysicalRTL()) {
+    xoffset += aReflowInput.ComputedWidth() - size;
+  }
+
+  // The bar size is fixed in these cases:
+  // - the progress position is determined: the bar size is fixed according
+  //   to it's value.
+  // - the progress position is indeterminate and the bar appearance should be
+  //   shown as native: the bar size is forced to 100%.
+  // Otherwise (when the progress is indeterminate and the bar appearance isn't
+  // native), the bar size isn't fixed and can be set by the author.
+  if (position != -1 || ShouldUseNativeStyle()) {
+    if (vertical) {
+      // We want the bar to begin at the bottom.
+      yoffset += aReflowInput.ComputedHeight() - size;
+
+      size -= reflowInput.ComputedPhysicalMargin().TopBottom() +
+              reflowInput.ComputedPhysicalBorderPadding().TopBottom();
+      size = std::max(size, 0);
+      reflowInput.SetComputedHeight(size);
+    } else {
+      size -= reflowInput.ComputedPhysicalMargin().LeftRight() +
+              reflowInput.ComputedPhysicalBorderPadding().LeftRight();
+      size = std::max(size, 0);
+      reflowInput.SetComputedWidth(size);
+    }
+  } else if (vertical) {
+    // For vertical progress bars, we need to position the bar specificly when
+    // the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
+    // because aReflowInput.ComputedHeight() - size == 0.
+    yoffset += aReflowInput.ComputedHeight() - reflowInput.ComputedHeight();
+  }
+
+  xoffset += reflowInput.ComputedPhysicalMargin().left;
+  yoffset += reflowInput.ComputedPhysicalMargin().top;
+
+  ReflowOutput barDesiredSize(aReflowInput);
+  ReflowChild(aChild, aPresContext, barDesiredSize, reflowInput, xoffset,
+              yoffset, ReflowChildFlags::Default, aStatus);
+  FinishReflowChild(aChild, aPresContext, barDesiredSize, &reflowInput, xoffset,
+                    yoffset, ReflowChildFlags::Default);
+}
+
+nsresult nsProgressFrame::AttributeChanged(int32_t aNameSpaceID,
+                                           nsAtom* aAttribute,
+                                           int32_t aModType) {
+  NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
+
+  if (aNameSpaceID == kNameSpaceID_None &&
+      (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max)) {
+    auto presShell = PresShell();
+    for (auto childFrame : PrincipalChildList()) {
+      presShell->FrameNeedsReflow(childFrame, IntrinsicDirty::None,
+                                  NS_FRAME_IS_DIRTY);
+    }
+    InvalidateFrame();
+  }
+
+  return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+LogicalSize nsProgressFrame::ComputeAutoSize(
+    gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
+    nscoord aAvailableISize, const LogicalSize& aMargin,
+    const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
+    ComputeSizeFlags aFlags) {
+  const WritingMode wm = GetWritingMode();
+  LogicalSize autoSize(wm);
+  autoSize.BSize(wm) = autoSize.ISize(wm) =
+      StyleFont()
+          ->mFont.size.ScaledBy(nsLayoutUtils::FontSizeInflationFor(this))
+          .ToAppUnits();  // 1em
+
+  if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
+    autoSize.ISize(wm) *= 10;  // 10em
+  } else {
+    autoSize.BSize(wm) *= 10;  // 10em
+  }
+
+  return autoSize.ConvertTo(aWM, wm);
+}
+
+nscoord nsProgressFrame::GetMinISize(gfxContext* aRenderingContext) {
+  RefPtr<nsFontMetrics> fontMet =
+      nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
+
+  nscoord minISize = fontMet->Font().size.ToAppUnits();  // 1em
+
+  if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
+    // The orientation is inline
+    minISize *= 10;  // 10em
+  }
+
+  return minISize;
+}
+
+nscoord nsProgressFrame::GetPrefISize(gfxContext* aRenderingContext) {
+  return GetMinISize(aRenderingContext);
+}
+
+bool nsProgressFrame::ShouldUseNativeStyle() const {
+  nsIFrame* barFrame = PrincipalChildList().FirstChild();
+
+  // Use the native style if these conditions are satisfied:
+  // - both frames use the native appearance;
+  // - neither frame has author specified rules setting the border or the
+  //   background.
+  return StyleDisplay()->EffectiveAppearance() ==
+             StyleAppearance::ProgressBar &&
+         !Style()->HasAuthorSpecifiedBorderOrBackground() && barFrame &&
+         barFrame->StyleDisplay()->EffectiveAppearance() ==
+             StyleAppearance::Progresschunk &&
+         !barFrame->Style()->HasAuthorSpecifiedBorderOrBackground();
+}