gfx/src/nsFont.cpp
author Justin Lebar <justin.lebar@gmail.com>
Mon, 23 Apr 2012 00:42:13 -0400
changeset 95431 ee415e3f509d36f663a2abdbe99dfb7d94f63d31
parent 80187 ec7577dec4fceef0ac2717416d9c48289402d935
child 96531 3378bceed278d2a03b6ecc52dd0f2f0e78bc926a
child 111565 f93960a93ad97a56d308bd9ce25d97cbc175d524
permissions -rw-r--r--
Bug 746055 - On desktop, increase image.mem.max_decoded_image_kb to 250mb, effectively backing out bug 732820. r=joe, a=desktop-only

/* -*- 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 "nsFont.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsCRT.h"

nsFont::nsFont(const char* aName, PRUint8 aStyle, PRUint8 aVariant,
               PRUint16 aWeight, PRInt16 aStretch, PRUint8 aDecoration,
               nscoord aSize, float aSizeAdjust,
               const nsString* aFeatureSettings,
               const nsString* aLanguageOverride)
{
  NS_ASSERTION(aName && IsASCII(nsDependentCString(aName)),
               "Must only pass ASCII names here");
  name.AssignASCII(aName);
  style = aStyle;
  systemFont = false;
  variant = aVariant;
  weight = aWeight;
  stretch = aStretch;
  decorations = aDecoration;
  size = aSize;
  sizeAdjust = aSizeAdjust;
  if (aFeatureSettings) {
    featureSettings = *aFeatureSettings;
  }
  if (aLanguageOverride) {
    languageOverride = *aLanguageOverride;
  }
}

nsFont::nsFont(const nsString& aName, PRUint8 aStyle, PRUint8 aVariant,
               PRUint16 aWeight, PRInt16 aStretch, PRUint8 aDecoration,
               nscoord aSize, float aSizeAdjust,
               const nsString* aFeatureSettings,
               const nsString* aLanguageOverride)
  : name(aName)
{
  style = aStyle;
  systemFont = false;
  variant = aVariant;
  weight = aWeight;
  stretch = aStretch;
  decorations = aDecoration;
  size = aSize;
  sizeAdjust = aSizeAdjust;
  if (aFeatureSettings) {
    featureSettings = *aFeatureSettings;
  }
  if (aLanguageOverride) {
    languageOverride = *aLanguageOverride;
  }
}

nsFont::nsFont(const nsFont& aOther)
  : name(aOther.name)
{
  style = aOther.style;
  systemFont = aOther.systemFont;
  variant = aOther.variant;
  weight = aOther.weight;
  stretch = aOther.stretch;
  decorations = aOther.decorations;
  size = aOther.size;
  sizeAdjust = aOther.sizeAdjust;
  featureSettings = aOther.featureSettings;
  languageOverride = aOther.languageOverride;
}

nsFont::nsFont()
{
}

nsFont::~nsFont()
{
}

bool nsFont::BaseEquals(const nsFont& aOther) const
{
  if ((style == aOther.style) &&
      (systemFont == aOther.systemFont) &&
      (weight == aOther.weight) &&
      (stretch == aOther.stretch) &&
      (size == aOther.size) &&
      (sizeAdjust == aOther.sizeAdjust) &&
      name.Equals(aOther.name, nsCaseInsensitiveStringComparator()) &&
      (featureSettings == aOther.featureSettings) &&
      (languageOverride == aOther.languageOverride)) {
    return true;
  }
  return false;
}

bool nsFont::Equals(const nsFont& aOther) const
{
  if (BaseEquals(aOther) &&
      (variant == aOther.variant) &&
      (decorations == aOther.decorations)) {
    return true;
  }
  return false;
}

nsFont& nsFont::operator=(const nsFont& aOther)
{
  name = aOther.name;
  style = aOther.style;
  systemFont = aOther.systemFont;
  variant = aOther.variant;
  weight = aOther.weight;
  stretch = aOther.stretch;
  decorations = aOther.decorations;
  size = aOther.size;
  sizeAdjust = aOther.sizeAdjust;
  featureSettings = aOther.featureSettings;
  languageOverride = aOther.languageOverride;
  return *this;
}

static bool IsGenericFontFamily(const nsString& aFamily)
{
  PRUint8 generic;
  nsFont::GetGenericID(aFamily, &generic);
  return generic != kGenericFont_NONE;
}

const PRUnichar kNullCh       = PRUnichar('\0');
const PRUnichar kSingleQuote  = PRUnichar('\'');
const PRUnichar kDoubleQuote  = PRUnichar('\"');
const PRUnichar kComma        = PRUnichar(',');

bool nsFont::EnumerateFamilies(nsFontFamilyEnumFunc aFunc, void* aData) const
{
  const PRUnichar *p, *p_end;
  name.BeginReading(p);
  name.EndReading(p_end);
  nsAutoString family;

  while (p < p_end) {
    while (nsCRT::IsAsciiSpace(*p))
      if (++p == p_end)
        return true;

    bool generic;
    if (*p == kSingleQuote || *p == kDoubleQuote) {
      // quoted font family
      PRUnichar quoteMark = *p;
      if (++p == p_end)
        return true;
      const PRUnichar *nameStart = p;

      // XXX What about CSS character escapes?
      while (*p != quoteMark)
        if (++p == p_end)
          return true;

      family = Substring(nameStart, p);
      generic = false;

      while (++p != p_end && *p != kComma)
        /* nothing */ ;

    } else {
      // unquoted font family
      const PRUnichar *nameStart = p;
      while (++p != p_end && *p != kComma)
        /* nothing */ ;

      family = Substring(nameStart, p);
      family.CompressWhitespace(false, true);
      generic = IsGenericFontFamily(family);
    }

    if (!family.IsEmpty() && !(*aFunc)(family, generic, aData))
      return false;

    ++p; // may advance past p_end
  }

  return true;
}

static bool FontEnumCallback(const nsString& aFamily, bool aGeneric, void *aData)
{
  *((nsString*)aData) = aFamily;
  return false;
}

void nsFont::GetFirstFamily(nsString& aFamily) const
{
  EnumerateFamilies(FontEnumCallback, &aFamily);
}

/*static*/
void nsFont::GetGenericID(const nsString& aGeneric, PRUint8* aID)
{
  *aID = kGenericFont_NONE;
  if (aGeneric.LowerCaseEqualsLiteral("-moz-fixed"))      *aID = kGenericFont_moz_fixed;
  else if (aGeneric.LowerCaseEqualsLiteral("serif"))      *aID = kGenericFont_serif;
  else if (aGeneric.LowerCaseEqualsLiteral("sans-serif")) *aID = kGenericFont_sans_serif;
  else if (aGeneric.LowerCaseEqualsLiteral("cursive"))    *aID = kGenericFont_cursive;
  else if (aGeneric.LowerCaseEqualsLiteral("fantasy"))    *aID = kGenericFont_fantasy;
  else if (aGeneric.LowerCaseEqualsLiteral("monospace"))  *aID = kGenericFont_monospace;
}