summaryrefslogtreecommitdiffstats
path: root/layout/forms/nsMeterFrame.cpp
blob: 6ef362820f7174ef7452aa499e0fa424e120b1df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/* -*- 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 "nsMeterFrame.h"

#include "nsIContent.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsNameSpaceManager.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsFormControlFrame.h"
#include "nsFontMetrics.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLMeterElement.h"
#include "nsContentList.h"
#include "nsCSSPseudoElements.h"
#include "nsStyleSet.h"
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSetHandleInlines.h"
#include "nsThemeConstants.h"
#include <algorithm>

using namespace mozilla;
using mozilla::dom::Element;
using mozilla::dom::HTMLMeterElement;

nsIFrame*
NS_NewMeterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
  return new (aPresShell) nsMeterFrame(aContext);
}

NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)

nsMeterFrame::nsMeterFrame(nsStyleContext* aContext)
  : nsContainerFrame(aContext)
  , mBarDiv(nullptr)
{
}

nsMeterFrame::~nsMeterFrame()
{
}

void
nsMeterFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
  NS_ASSERTION(!GetPrevContinuation(),
               "nsMeterFrame should not have continuations; if it does we "
               "need to call RegUnregAccessKey only for the first.");
  nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
  nsContentUtils::DestroyAnonymousContent(&mBarDiv);
  nsContainerFrame::DestroyFrom(aDestructRoot);
}

nsIAtom*
nsMeterFrame::GetType() const
{
  return nsGkAtoms::meterFrame;
}

nsresult
nsMeterFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
  // Get the NodeInfoManager and tag necessary to create the meter bar div.
  nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();

  // Create the div.
  mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);

  // Associate ::-moz-meter-bar pseudo-element to the anonymous child.
  mBarDiv->SetPseudoElementType(CSSPseudoElementType::mozMeterBar);

  aElements.AppendElement(mBarDiv);

  return NS_OK;
}

void
nsMeterFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
                                       uint32_t aFilter)
{
  if (mBarDiv) {
    aElements.AppendElement(mBarDiv);
  }
}

NS_QUERYFRAME_HEAD(nsMeterFrame)
  NS_QUERYFRAME_ENTRY(nsMeterFrame)
  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)


void
nsMeterFrame::Reflow(nsPresContext*           aPresContext,
                     ReflowOutput&     aDesiredSize,
                     const ReflowInput& aReflowInput,
                     nsReflowStatus&          aStatus)
{
  MarkInReflow();
  DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
  NS_ASSERTION(!GetPrevContinuation(),
               "nsMeterFrame should not have continuations; if it does we "
               "need to call RegUnregAccessKey only for the first.");

  if (mState & NS_FRAME_FIRST_REFLOW) {
    nsFormControlFrame::RegUnRegAccessKey(this, true);
  }

  nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
  NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");

  ReflowBarFrame(barFrame, aPresContext, aReflowInput, aStatus);

  aDesiredSize.SetSize(aReflowInput.GetWritingMode(),
                       aReflowInput.ComputedSizeWithBorderPadding());

  aDesiredSize.SetOverflowAreasToDesiredBounds();
  ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
  FinishAndStoreOverflow(&aDesiredSize);

  aStatus = NS_FRAME_COMPLETE;

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}

void
nsMeterFrame::ReflowBarFrame(nsIFrame*                aBarFrame,
                             nsPresContext*           aPresContext,
                             const ReflowInput& aReflowInput,
                             nsReflowStatus&          aStatus)
{
  bool vertical = ResolvedOrientationIsVertical();
  WritingMode wm = aBarFrame->GetWritingMode();
  LogicalSize availSize = aReflowInput.ComputedSize(wm);
  availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
  ReflowInput reflowInput(aPresContext, aReflowInput,
                                aBarFrame, availSize);
  nscoord size = vertical ? aReflowInput.ComputedHeight()
                          : aReflowInput.ComputedWidth();
  nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
  nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;

  // NOTE: Introduce a new function getPosition in the content part ?
  HTMLMeterElement* meterElement = static_cast<HTMLMeterElement*>(mContent);

  double max = meterElement->Max();
  double min = meterElement->Min();
  double value = meterElement->Value();

  double position = max - min;
  position = position != 0 ? (value - min) / position : 1;

  size = NSToCoordRound(size * position);

  if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
    xoffset += aReflowInput.ComputedWidth() - size;
  }

  // The bar position is *always* constrained.
  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);
  }

  xoffset += reflowInput.ComputedPhysicalMargin().left;
  yoffset += reflowInput.ComputedPhysicalMargin().top;

  ReflowOutput barDesiredSize(reflowInput);
  ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowInput, xoffset,
              yoffset, 0, aStatus);
  FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowInput,
                    xoffset, yoffset, 0);
}

nsresult
nsMeterFrame::AttributeChanged(int32_t  aNameSpaceID,
                               nsIAtom* aAttribute,
                               int32_t  aModType)
{
  NS_ASSERTION(mBarDiv, "Meter bar div must exist!");

  if (aNameSpaceID == kNameSpaceID_None &&
      (aAttribute == nsGkAtoms::value ||
       aAttribute == nsGkAtoms::max   ||
       aAttribute == nsGkAtoms::min )) {
    nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
    NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
    PresContext()->PresShell()->FrameNeedsReflow(barFrame,
                                                 nsIPresShell::eResize,
                                                 NS_FRAME_IS_DIRTY);
    InvalidateFrame();
  }

  return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
                                            aModType);
}

LogicalSize
nsMeterFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
                              WritingMode         aWM,
                              const LogicalSize&  aCBSize,
                              nscoord             aAvailableISize,
                              const LogicalSize&  aMargin,
                              const LogicalSize&  aBorder,
                              const LogicalSize&  aPadding,
                              ComputeSizeFlags    aFlags)
{
  RefPtr<nsFontMetrics> fontMet =
    nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);

  const WritingMode wm = GetWritingMode();
  LogicalSize autoSize(wm);
  autoSize.BSize(wm) = autoSize.ISize(wm) = fontMet->Font().size; // 1em

  if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
    autoSize.ISize(wm) *= 5; // 5em
  } else {
    autoSize.BSize(wm) *= 5; // 5em
  }

  return autoSize.ConvertTo(aWM, wm);
}

nscoord
nsMeterFrame::GetMinISize(nsRenderingContext *aRenderingContext)
{
  RefPtr<nsFontMetrics> fontMet =
    nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);

  nscoord minISize = fontMet->Font().size; // 1em

  if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
    // The orientation is inline
    minISize *= 5; // 5em
  }

  return minISize;
}

nscoord
nsMeterFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
{
  return GetMinISize(aRenderingContext);
}

bool
nsMeterFrame::ShouldUseNativeStyle() const
{
  nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();

  // 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()->mAppearance == NS_THEME_METERBAR &&
         !PresContext()->HasAuthorSpecifiedRules(this,
                                                 NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
         barFrame &&
         barFrame->StyleDisplay()->mAppearance == NS_THEME_METERCHUNK &&
         !PresContext()->HasAuthorSpecifiedRules(barFrame,
                                                 NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
}

Element*
nsMeterFrame::GetPseudoElement(CSSPseudoElementType aType)
{
  if (aType == CSSPseudoElementType::mozMeterBar) {
    return mBarDiv;
  }

  return nsContainerFrame::GetPseudoElement(aType);
}