Don't attempt implicit English deinflection of search terms

Details: #41 (comment)

Since 6eb4787, this would report "No
results" for many alphabetic terms in Exact and Forward searches. While
this aspect could have been fixed, the deinflection could also dig up
unrelated words and was slowing down searches with additional queries.

A Forward Search for the stem accomplishes everything this feature was
trying to do, minus the surprise. So let's just drop it.

This reverts commit f01a37c

src/method.cpp

@@ -65,37 +65,3 @@ QString Query::toLogicString() const
 {
  return query;
 }
-
-QStringList stemWords(const QString &words)
-{
- struct {
- const char* suffix;
- const char* stem;
- } dict[] = {
- {"ies", "y"},
- {"ied", "y"},
- {"es", ""},
- {"ting", "te"},
- {"ing", ""},
- {"ing", "e"},
- {"ed", "e"},
- {"ed", ""},
- {"id", "y"},
- {"ices", "ex"},
- {"ves", "fe"},
- {"s", ""},
- };
-
- QStringList list;
- for (size_t i=0; i<sizeof(dict)/sizeof(dict[0]); i++) {
- QString suffix(dict[i].suffix);
- if (words.endsWith(suffix, Qt::CaseInsensitive)) {
- QString stem(dict[i].stem);
- QString t(words);
- t.chop(suffix.length());
- t.append(stem);
- list << t;
- }
- }
- return list;
-}

src/method.h

@@ -60,8 +60,4 @@ struct Query {
  QString toLogicString() const;
 };
 
-QStringList stemWords(const QString &);
-
-#define IGNORE_SEEK_HEADING
-
 #endif

src/searchpage.cpp

@@ -12,22 +12,9 @@ SearchPage::SearchPage(QWidget *parent, const SearchMethod &method)
 
 RET_SEARCH SearchPage::search(const Query& query)
 {
- QStringList queries;
- queries << query.query;
- switch (query.method.direction) {
- case ExactWordSearch:
- case ForwardSearch:
- queries << stemWords(query.query);
- break;
- default:
- break;
- }
- RET_SEARCH retStatus = NOT_HIT;
  PageItems items(CONF->dictSheet);
  int itemIndex = 0;
- foreach (const QString &q, queries) {
- retStatus = doSearch(Query(q, query.method), items, itemIndex);
- }
+ const RET_SEARCH retStatus = doSearch(query, items, itemIndex);
 
  bookTree->insertTopLevelItems(0, items.topItems());
  bookTree->setCurrentItem(bookTree->topLevelItem(0));