|
- /*
- * Copyright 2007 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- using System;
-
- namespace ZXing.QrCode.Internal
- {
- /// <summary>
- /// <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
- /// data can be encoded to bits in the QR code standard.</p>
- /// </summary>
- /// <author>Sean Owen</author>
- public sealed class Mode
- {
- /// <summary>
- /// Gets the name.
- /// </summary>
- public String Name
- {
- get
- {
- return name;
- }
- }
-
- // No, we can't use an enum here. J2ME doesn't support it.
-
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode TERMINATOR = new Mode(new int[] { 0, 0, 0 }, 0x00, "TERMINATOR"); // Not really a mode...
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode NUMERIC = new Mode(new int[] { 10, 12, 14 }, 0x01, "NUMERIC");
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode ALPHANUMERIC = new Mode(new int[] { 9, 11, 13 }, 0x02, "ALPHANUMERIC");
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode STRUCTURED_APPEND = new Mode(new int[] { 0, 0, 0 }, 0x03, "STRUCTURED_APPEND"); // Not supported
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode BYTE = new Mode(new int[] { 8, 16, 16 }, 0x04, "BYTE");
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode ECI = new Mode(null, 0x07, "ECI"); // character counts don't apply
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode KANJI = new Mode(new int[] { 8, 10, 12 }, 0x08, "KANJI");
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode FNC1_FIRST_POSITION = new Mode(null, 0x05, "FNC1_FIRST_POSITION");
- /// <summary>
- ///
- /// </summary>
- public static readonly Mode FNC1_SECOND_POSITION = new Mode(null, 0x09, "FNC1_SECOND_POSITION");
- /// <summary>See GBT 18284-2000; "Hanzi" is a transliteration of this mode name.</summary>
- public static readonly Mode HANZI = new Mode(new int[] { 8, 10, 12 }, 0x0D, "HANZI");
-
- private readonly int[] characterCountBitsForVersions;
- private readonly int bits;
- private readonly String name;
-
- private Mode(int[] characterCountBitsForVersions, int bits, System.String name)
- {
- this.characterCountBitsForVersions = characterCountBitsForVersions;
- this.bits = bits;
- this.name = name;
- }
-
- /// <summary>
- /// Fors the bits.
- /// </summary>
- /// <param name="bits">four bits encoding a QR Code data mode</param>
- /// <returns>
- /// <see cref="Mode"/> encoded by these bits
- /// </returns>
- /// <exception cref="ArgumentException">if bits do not correspond to a known mode</exception>
- public static Mode forBits(int bits)
- {
- switch (bits)
- {
- case 0x0:
- return TERMINATOR;
- case 0x1:
- return NUMERIC;
- case 0x2:
- return ALPHANUMERIC;
- case 0x3:
- return STRUCTURED_APPEND;
- case 0x4:
- return BYTE;
- case 0x5:
- return FNC1_FIRST_POSITION;
- case 0x7:
- return ECI;
- case 0x8:
- return KANJI;
- case 0x9:
- return FNC1_SECOND_POSITION;
- case 0xD:
- // 0xD is defined in GBT 18284-2000, may not be supported in foreign country
- return HANZI;
- default:
- throw new ArgumentException();
- }
- }
-
- /// <param name="version">version in question
- /// </param>
- /// <returns> number of bits used, in this QR Code symbol {@link Version}, to encode the
- /// count of characters that will follow encoded in this {@link Mode}
- /// </returns>
- public int getCharacterCountBits(Version version)
- {
- if (characterCountBitsForVersions == null)
- {
- throw new ArgumentException("Character count doesn't apply to this mode");
- }
- int number = version.VersionNumber;
- int offset;
- if (number <= 9)
- {
- offset = 0;
- }
- else if (number <= 26)
- {
- offset = 1;
- }
- else
- {
- offset = 2;
- }
- return characterCountBitsForVersions[offset];
- }
-
- /// <summary>
- /// Gets the bits.
- /// </summary>
- public int Bits
- {
- get
- {
- return bits;
- }
- }
-
- /// <summary>
- /// Returns a <see cref="System.String"/> that represents this instance.
- /// </summary>
- /// <returns>
- /// A <see cref="System.String"/> that represents this instance.
- /// </returns>
- public override String ToString()
- {
- return name;
- }
- }
- }
|