DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Untracked file

Line Code
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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsHTMLParts.h"
#include "nsPresContext.h"
#include "nsLineLayout.h"
#include "nsStyleConsts.h"
#include "nsHTMLAtoms.h"
#include "nsIFontMetrics.h"
#include "nsIRenderingContext.h"
#include "nsLayoutAtoms.h"
#include "nsTextTransformer.h"

//FOR SELECTION
#include "nsIContent.h"
#include "nsIFrameSelection.h"
//END INCLUDES FOR SELECTION

class BRFrame : public nsFrame {
public:
  // nsIFrame
#ifdef NS_DEBUG
  NS_IMETHOD Paint(nsPresContext*      aPresContext,
                   nsIRenderingContext& aRenderingContext,
                   const nsRect&        aDirtyRect,
                   nsFramePaintLayer    aWhichLayer,
                   PRUint32             aFlags = 0);
#endif
  NS_IMETHOD GetContentAndOffsetsFromPoint(nsPresContext* aCX,
                         const nsPoint& aPoint,
                         nsIContent** aNewContent,
                         PRInt32& aContentOffset,
                         PRInt32& aContentOffsetEnd,
                         PRBool&  aBeginFrameContent);
  NS_IMETHOD PeekOffset(nsPresContext* aPresContext, 
                         nsPeekOffsetStruct *aPos);

  // nsIHTMLReflow
  NS_IMETHOD Reflow(nsPresContext* aPresContext,
                    nsHTMLReflowMetrics& aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus& aStatus);
  virtual nsIAtom* GetType() const;
protected:
  virtual ~BRFrame();
};

nsresult
NS_NewBRFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
  NS_PRECONDITION(aNewFrame, "null OUT ptr");
  if (nsnull == aNewFrame) {
    return NS_ERROR_NULL_POINTER;
  }
  nsIFrame* frame = new (aPresShell) BRFrame;
  if (nsnull == frame) {
    return NS_ERROR_OUT_OF_MEMORY;
  }
  *aNewFrame = frame;
  return NS_OK;
}

BRFrame::~BRFrame()
{
}

#ifdef NS_DEBUG
NS_IMETHODIMP
BRFrame::Paint(nsPresContext*      aPresContext,
               nsIRenderingContext& aRenderingContext,
               const nsRect&        aDirtyRect,
               nsFramePaintLayer    aWhichLayer,
               PRUint32             aFlags)
{
  if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
    float p2t;
    p2t = aPresContext->PixelsToTwips();
    nscoord five = NSIntPixelsToTwips(5, p2t);
    aRenderingContext.SetColor(NS_RGB(0, 255, 255));
    aRenderingContext.FillRect(0, 0, five, five*2);
  }
  return NS_OK;
}
#endif

NS_IMETHODIMP
BRFrame::Reflow(nsPresContext* aPresContext,
                nsHTMLReflowMetrics& aMetrics,
                const nsHTMLReflowState& aReflowState,
                nsReflowStatus& aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("BRFrame", aReflowState.reason);
  DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
  if (aMetrics.mComputeMEW) {
    aMetrics.mMaxElementWidth = 0;
  }
  aMetrics.height = 0; // BR frames with height 0 are ignored in quirks
                       // mode by nsLineLayout::VerticalAlignFrames .
                       // However, it's not always 0.  See below.
  aMetrics.width = 0;
  aMetrics.ascent = 0;
  aMetrics.descent = 0;

  // Only when the BR is operating in a line-layout situation will it
  // behave like a BR.
  nsLineLayout* ll = aReflowState.mLineLayout;
  if (ll) {
    // Note that the compatibility mode check excludes AlmostStandards
    // mode, since this is the inline box model.  See bug 161691.
    if ( ll->CanPlaceFloatNow() ||
         ll->GetCompatMode() == eCompatibility_FullStandards ) {
      // If we can place a float on the line now it means that the
      // line is effectively empty (there may be zero sized compressed
      // white-space frames on the line, but they are to be ignored).
      //
      // If this frame is going to terminate the line we know
      // that nothing else will go on the line. Therefore, in this
      // case, we provide some height for the BR frame so that it
      // creates some vertical whitespace.  It's necessary to use the
      // line-height rather than the font size because the
      // quirks-mode fix that doesn't apply the block's min
      // line-height makes this necessary to make BR cause a line
      // of the full line-height

      // We also do this in strict mode because BR should act like a
      // normal inline frame.  That line-height is used is important
      // here for cases where the line-height is less that 1.
      SetFontFromStyle(aReflowState.rendContext, mStyleContext);
      nsCOMPtr<nsIFontMetrics> fm;
      aReflowState.rendContext->GetFontMetrics(*getter_AddRefs(fm));
      if (fm) {
        nscoord ascent, descent;
        fm->GetMaxAscent(ascent);
        fm->GetMaxDescent(descent);
        nscoord logicalHeight =
          aReflowState.CalcLineHeight(aPresContext,
                                       aReflowState.rendContext,
                                       this);
        nscoord leading = logicalHeight - ascent - descent;
        aMetrics.height = logicalHeight;
        aMetrics.ascent = ascent + (leading/2);
        aMetrics.descent = logicalHeight - aMetrics.ascent;
                      // = descent + (leading/2), but without rounding error
      }
      else {
        aMetrics.ascent = aMetrics.height = 0;
      }

      // XXX temporary until I figure out a better solution; see the
      // code in nsLineLayout::VerticalAlignFrames that zaps minY/maxY
      // if the width is zero.
      // XXX This also fixes bug 10036!
      // Warning: nsTextControlFrame::CalculateSizeStandard depends on
      // the following line, see bug 228752.
      aMetrics.width = 1;

      // Update max-element-width to keep us honest
      if (aMetrics.mComputeMEW && aMetrics.width > aMetrics.mMaxElementWidth) {
        aMetrics.mMaxElementWidth = aMetrics.width;
      }
    }

    // Return our reflow status
    PRUint32 breakType = aReflowState.mStyleDisplay->mBreakType;
    if (NS_STYLE_CLEAR_NONE == breakType) {
      breakType = NS_STYLE_CLEAR_LINE;
    }

    aStatus = NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
      NS_INLINE_MAKE_BREAK_TYPE(breakType);
    ll->SetLineEndsInBR(PR_TRUE);
  }
  else {
    aStatus = NS_FRAME_COMPLETE;
  }

  NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
  return NS_OK;
}

nsIAtom*
BRFrame::GetType() const
{
  return nsLayoutAtoms::brFrame;
}

NS_IMETHODIMP BRFrame::GetContentAndOffsetsFromPoint(nsPresContext* aCX,
                                                     const nsPoint&  aPoint,
                                                     nsIContent **   aContent,
                                                     PRInt32&        aOffsetBegin,
                                                     PRInt32&        aOffsetEnd,
                                                     PRBool&         aBeginFrameContent)
{
  if (!mContent)
    return NS_ERROR_NULL_POINTER;
  NS_IF_ADDREF(*aContent = mContent->GetParent());

  if (*aContent)
    aOffsetBegin = (*aContent)->IndexOf(mContent);
  aOffsetEnd = aOffsetBegin;
  aBeginFrameContent = PR_TRUE;
  return NS_OK;
}

NS_IMETHODIMP BRFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
{
  if (!aPos)
    return NS_ERROR_NULL_POINTER;

  //BR is also a whitespace, but sometimes GetNextWord() can't handle this
  //See bug 304891
  nsTextTransformer::Initialize();
  if (nsTextTransformer::GetWordSelectEatSpaceAfter() &&
      aPos->mDirection == eDirNext)
    aPos->mEatingWS = PR_TRUE;

 //offset of this content in its parents child list. base 0
  PRInt32 offsetBegin = mContent->GetParent()->IndexOf(mContent);

  if (aPos->mAmount != eSelectLine && aPos->mAmount != eSelectBeginLine 
      && aPos->mAmount != eSelectEndLine) //then we must do the adjustment to make sure we leave this frame
  {
    if (aPos->mDirection == eDirNext)
      aPos->mStartOffset = offsetBegin +1;//go to end to make sure we jump to next node.
    else
      aPos->mStartOffset = offsetBegin; //we start at beginning to make sure we leave this frame.
  }
  return nsFrame::PeekOffset(aPresContext, aPos);//now we let the default take over.
}