diff options
Diffstat (limited to 'java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java')
| -rw-r--r-- | java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java | 165 |
1 files changed, 146 insertions, 19 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java b/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java index 519637bf4..ba12676ad 100644 --- a/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java +++ b/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java @@ -30,20 +30,28 @@ import java.util.Arrays; /** * String parser of moreKeys attribute of Key. * The string is comma separated texts each of which represents one "more key". + * - String resource can be embedded into specification @string/name. This is done before parsing + * comma. * Each "more key" specification is one of the following: * - A single letter (Letter) * - Label optionally followed by keyOutputText or code (keyLabel|keyOutputText). * - Icon followed by keyOutputText or code (@icon/icon_name|@integer/key_code) - * Special character, comma ',' backslash '\', and bar '|' can be escaped by '\' - * character. + * Special character, comma ',' backslash '\', and bar '|' can be escaped by '\' character. * Note that the character '@' and '\' are also parsed by XML parser and CSV parser as well. - * See {@link KeyboardIconsSet} about icon_number. + * See {@link KeyboardIconsSet} about icon_name. */ public class KeySpecParser { private static final boolean DEBUG = LatinImeLogger.sDBG; + + // Constants for parsing. + private static int COMMA = ','; + private static final char ESCAPE_CHAR = '\\'; + private static final char PREFIX_AT = '@'; + private static final char SUFFIX_SLASH = '/'; + private static final String PREFIX_STRING = PREFIX_AT + "string"; private static final char LABEL_END = '|'; - private static final String PREFIX_ICON = Utils.PREFIX_AT + "icon" + Utils.SUFFIX_SLASH; - private static final String PREFIX_CODE = Utils.PREFIX_AT + "integer" + Utils.SUFFIX_SLASH; + private static final String PREFIX_ICON = PREFIX_AT + "icon" + SUFFIX_SLASH; + private static final String PREFIX_CODE = PREFIX_AT + "integer" + SUFFIX_SLASH; private static final String ADDITIONAL_MORE_KEY_MARKER = "%"; private KeySpecParser() { @@ -56,7 +64,7 @@ public class KeySpecParser { if (end > 0) { return true; } - throw new MoreKeySpecParserError("outputText or code not specified: " + moreKeySpec); + throw new KeySpecParserError("outputText or code not specified: " + moreKeySpec); } return false; } @@ -71,14 +79,14 @@ public class KeySpecParser { } private static String parseEscape(String text) { - if (text.indexOf(Utils.ESCAPE_CHAR) < 0) { + if (text.indexOf(ESCAPE_CHAR) < 0) { return text; } final int length = text.length(); final StringBuilder sb = new StringBuilder(); for (int pos = 0; pos < length; pos++) { final char c = text.charAt(pos); - if (c == Utils.ESCAPE_CHAR && pos + 1 < length) { + if (c == ESCAPE_CHAR && pos + 1 < length) { // Skip escape char pos++; sb.append(text.charAt(pos)); @@ -90,17 +98,17 @@ public class KeySpecParser { } private static int indexOfLabelEnd(String moreKeySpec, int start) { - if (moreKeySpec.indexOf(Utils.ESCAPE_CHAR, start) < 0) { + if (moreKeySpec.indexOf(ESCAPE_CHAR, start) < 0) { final int end = moreKeySpec.indexOf(LABEL_END, start); if (end == 0) { - throw new MoreKeySpecParserError(LABEL_END + " at " + start + ": " + moreKeySpec); + throw new KeySpecParserError(LABEL_END + " at " + start + ": " + moreKeySpec); } return end; } final int length = moreKeySpec.length(); for (int pos = start; pos < length; pos++) { final char c = moreKeySpec.charAt(pos); - if (c == Utils.ESCAPE_CHAR && pos + 1 < length) { + if (c == ESCAPE_CHAR && pos + 1 < length) { // Skip escape char pos++; } else if (c == LABEL_END) { @@ -118,7 +126,7 @@ public class KeySpecParser { final String label = (end > 0) ? parseEscape(moreKeySpec.substring(0, end)) : parseEscape(moreKeySpec); if (TextUtils.isEmpty(label)) { - throw new MoreKeySpecParserError("Empty label: " + moreKeySpec); + throw new KeySpecParserError("Empty label: " + moreKeySpec); } return label; } @@ -130,7 +138,7 @@ public class KeySpecParser { final int end = indexOfLabelEnd(moreKeySpec, 0); if (end > 0) { if (indexOfLabelEnd(moreKeySpec, end + 1) >= 0) { - throw new MoreKeySpecParserError("Multiple " + LABEL_END + ": " + throw new KeySpecParserError("Multiple " + LABEL_END + ": " + moreKeySpec); } final String outputText = parseEscape( @@ -138,11 +146,11 @@ public class KeySpecParser { if (!TextUtils.isEmpty(outputText)) { return outputText; } - throw new MoreKeySpecParserError("Empty outputText: " + moreKeySpec); + throw new KeySpecParserError("Empty outputText: " + moreKeySpec); } final String label = getLabel(moreKeySpec); if (label == null) { - throw new MoreKeySpecParserError("Empty label: " + moreKeySpec); + throw new KeySpecParserError("Empty label: " + moreKeySpec); } // Code is automatically generated for one letter label. See {@link getCode()}. return (Utils.codePointCount(label) == 1) ? null : label; @@ -152,9 +160,9 @@ public class KeySpecParser { if (hasCode(moreKeySpec)) { final int end = indexOfLabelEnd(moreKeySpec, 0); if (indexOfLabelEnd(moreKeySpec, end + 1) >= 0) { - throw new MoreKeySpecParserError("Multiple " + LABEL_END + ": " + moreKeySpec); + throw new KeySpecParserError("Multiple " + LABEL_END + ": " + moreKeySpec); } - final int resId = Utils.getResourceId(res, + final int resId = getResourceId(res, moreKeySpec.substring(end + /* LABEL_END */1 + /* PREFIX_AT */1), R.string.english_ime_name); final int code = res.getInteger(resId); @@ -251,9 +259,128 @@ public class KeySpecParser { } @SuppressWarnings("serial") - public static class MoreKeySpecParserError extends RuntimeException { - public MoreKeySpecParserError(String message) { + public static class KeySpecParserError extends RuntimeException { + public KeySpecParserError(String message) { super(message); } } + + private static int getResourceId(Resources res, String name, int packageNameResId) { + String packageName = res.getResourcePackageName(packageNameResId); + int resId = res.getIdentifier(name, null, packageName); + if (resId == 0) { + throw new RuntimeException("Unknown resource: " + name); + } + return resId; + } + + private static String resolveStringResource(String text, Resources res, int packageNameResId) { + final int size = text.length(); + if (size < PREFIX_STRING.length()) { + return text; + } + + StringBuilder sb = null; + for (int pos = 0; pos < size; pos++) { + final char c = text.charAt(pos); + if (c == PREFIX_AT && text.startsWith(PREFIX_STRING, pos)) { + if (sb == null) { + sb = new StringBuilder(text.substring(0, pos)); + } + final int end = searchResourceNameEnd(text, pos + PREFIX_STRING.length()); + final String resName = text.substring(pos + 1, end); + final int resId = getResourceId(res, resName, packageNameResId); + sb.append(res.getString(resId)); + pos = end - 1; + } else if (c == ESCAPE_CHAR) { + pos++; + if (sb != null) { + sb.append(c); + if (pos < size) { + sb.append(text.charAt(pos)); + } + } + } else if (sb != null) { + sb.append(c); + } + } + return (sb == null) ? text : sb.toString(); + } + + private static int searchResourceNameEnd(String text, int start) { + final int size = text.length(); + if (start >= size || text.charAt(start) != SUFFIX_SLASH) { + throw new RuntimeException("Resource name not specified"); + } + for (int pos = start + 1; pos < size; pos++) { + final char c = text.charAt(pos); + // String resource name should be consisted of [a-z_0-9]. + if ((c >= 'a' && c <= 'z') || c == '_' || (c >= '0' && c <= '9')) { + continue; + } + return pos; + } + return size; + } + + public static String[] parseCsvString(String rawText, Resources res, int packageNameResId) { + final String text = resolveStringResource(rawText, res, packageNameResId); + final int size = text.length(); + if (size == 0) { + return null; + } + if (Utils.codePointCount(text) == 1) { + return new String[] { text }; + } + + final StringBuilder sb = new StringBuilder(); + ArrayList<String> list = null; + int start = 0; + for (int pos = 0; pos < size; pos++) { + final char c = text.charAt(pos); + if (c == COMMA) { + if (list == null) { + list = new ArrayList<String>(); + } + if (sb.length() == 0) { + list.add(text.substring(start, pos)); + } else { + list.add(sb.toString()); + sb.setLength(0); + } + // Skip comma + start = pos + 1; + continue; + } + // TODO: Only parse escaped comma. Other escaped character should be passed through + // with escaped character prefixed. + // Skip escaped sequence. + if (c == ESCAPE_CHAR) { + if (start == pos) { + // Skip escaping comma at the beginning of the text. + start++; + pos++; + } else { + if (start < pos && sb.length() == 0) { + sb.append(text.substring(start, pos)); + } + // Skip comma + pos++; + if (pos < size) { + sb.append(text.charAt(pos)); + } + } + } else if (sb.length() > 0) { + sb.append(c); + } + } + if (list == null) { + return new String[] { + sb.length() > 0 ? sb.toString() : text.substring(start) + }; + } else { + list.add(sb.length() > 0 ? sb.toString() : text.substring(start)); + return list.toArray(new String[list.size()]); + } + } } |