1 /*

     2  * Copyright (C) 2010 Google Inc. All rights reserved.

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    10  *     * Redistributions in binary form must reproduce the above

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    16  * this software without specific prior written permission.

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    18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

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    20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

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    28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    29  */

    30 

    31 #include "config.h"

    32 #include "MockSpellCheck.h"

    33 

    34 #include "public/WebString.h"

    35 #include <wtf/ASCIICType.h>

    36 #include <wtf/Assertions.h>

    37 

    38 using namespace WebCore;

    39 using namespace WebKit;

    40 

    41 MockSpellCheck::MockSpellCheck()

    42     : m_initialized(false) {}

    43 

    44 MockSpellCheck::~MockSpellCheck() {}

    45 

    46 static bool isNotASCIIAlpha(UChar ch) { return !isASCIIAlpha(ch); }

    47 

    48 bool MockSpellCheck::spellCheckWord(const WebString& text, int* misspelledOffset, int* misspelledLength)

    49 {

    50     ASSERT(misspelledOffset);

    51     ASSERT(misspelledLength);

    52 

    53     // Initialize this spellchecker.

    54     initializeIfNeeded();

    55 

    56     // Reset the result values as our spellchecker does.

    57     *misspelledOffset = 0;

    58     *misspelledLength = 0;

    59 

    60     // Convert to a String because we store String instances in

    61     // m_misspelledWords and WebString has no find().

    62     const String stringText(text.data(), text.length());

    63 

    64     // Extract the first possible English word from the given string.

    65     // The given string may include non-ASCII characters or numbers. So, we

    66     // should filter out such characters before start looking up our

    67     // misspelled-word table.

    68     // (This is a simple version of our SpellCheckWordIterator class.)

    69     // If the given string doesn't include any ASCII characters, we can treat the

    70     // string as valid one.

    71     // Unfortunately, This implementation splits a contraction, i.e. "isn't" is

    72     // split into two pieces "isn" and "t". This is OK because webkit tests

    73     // don't have misspelled contractions.

    74     int wordOffset = stringText.find(isASCIIAlpha);

    75     if (wordOffset == -1)

    76         return true;

    77     int wordEnd = stringText.find(isNotASCIIAlpha, wordOffset);

    78     int wordLength = wordEnd == -1 ? stringText.length() - wordOffset : wordEnd - wordOffset;

    79 

    80     // Look up our misspelled-word table to check if the extracted word is a

    81     // known misspelled word, and return the offset and the length of the

    82     // extracted word if this word is a known misspelled word.

    83     // (See the comment in MockSpellCheck::initializeIfNeeded() why we use a

    84     // misspelled-word table.)

    85     String word = stringText.substring(wordOffset, wordLength);

    86     if (!m_misspelledWords.contains(word))

    87         return true;

    88 

    89     *misspelledOffset = wordOffset;

    90     *misspelledLength = wordLength;

    91     return false;

    92 }

    93 

    94 bool MockSpellCheck::initializeIfNeeded()

    95 {

    96     // Exit if we have already initialized this object.

    97     if (m_initialized)

    98         return false;

    99 

   100     // Create a table that consists of misspelled words used in WebKit layout

   101     // tests.

   102     // Since WebKit layout tests don't have so many misspelled words as

   103     // well-spelled words, it is easier to compare the given word with misspelled

   104     // ones than to compare with well-spelled ones.

   105     static const char* misspelledWords[] = {

   106         // These words are known misspelled words in webkit tests.

   107         // If there are other misspelled words in webkit tests, please add them in

   108         // this array.

   109         "foo",

   110         "Foo",

   111         "baz",

   112         "fo",

   113         "LibertyF",

   114         "chello",

   115         "xxxtestxxx",

   116         "XXxxx",

   117         "Textx",

   118         "blockquoted",

   119         "asd",

   120         "Lorem",

   121         "Nunc",

   122         "Curabitur",

   123         "eu",

   124         "adlj",

   125         "adaasj",

   126         "sdklj",

   127         "jlkds",

   128         "jsaada",

   129         "jlda",

   130         "zz",

   131         "contentEditable",

   132         // The following words are used by unit tests.

   133         "ifmmp",

   134         "qwertyuiopasd",

   135         "qwertyuiopasdf",

   136     };

   137 

   138     m_misspelledWords.clear();

   139     for (size_t i = 0; i < arraysize(misspelledWords); ++i)

   140         m_misspelledWords.add(String::fromUTF8(misspelledWords[i]), false);

   141 

   142     // Mark as initialized to prevent this object from being initialized twice

   143     // or more.

   144     m_initialized = true;

   145 

   146     // Since this MockSpellCheck class doesn't download dictionaries, this

   147     // function always returns false.

   148     return false;

   149 }