fix(lsp/java): on-demand imports cause definition and reference providers to fail (fixes #1449, #1211)

lsp/java/src/main/java/com/itsaky/androidide/lsp/java/utils/FindHelper.java

@@ -191,7 +191,7 @@ public class FindHelper {
     } catch (IOException e) {
       throw new RuntimeException(e);
     }
-    Matcher matcher = Pattern.compile("\\b" + name + "\\b").matcher(contents);
+    Matcher matcher = Pattern.compile("\\b" + Pattern.quote(name.toString()) + "\\b").matcher(contents);
     matcher.region(start, end);
     if (matcher.find()) {
       return matcher.start();

lsp/java/src/test/java/com/itsaky/androidide/lsp/java/utils/FindHelperTest.kt

@@ -0,0 +1,58 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.lsp.java.utils
+
+import com.google.common.truth.Truth.assertThat
+import com.itsaky.androidide.lsp.java.JavaLSPTest
+import com.itsaky.androidide.lsp.models.DefinitionParams
+import com.itsaky.androidide.models.Position
+import com.itsaky.androidide.progress.ICancelChecker
+import kotlinx.coroutines.runBlocking
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+/**
+ * @author Akash Yadav
+ */
+@RunWith(RobolectricTestRunner::class)
+@Config(manifest = Config.DEFAULT_VALUE_STRING)
+class FindHelperTest {
+
+  @Before
+  fun setup() {
+    JavaLSPTest.setup()
+  }
+
+  @Test
+  fun `test FindHelper#findNameIn behavior with on-demand import`() {
+    JavaLSPTest.apply {
+      openFile("utils/FindHelperRegexElements")
+
+      // Find definition for 'field' class of type 'String'
+      val position = Position(9, 7)
+      val params = DefinitionParams(file!!, position, ICancelChecker.NOOP)
+      val definitions = runBlocking { server.findDefinition(params) }
+      assertThat(definitions).isNotNull()
+      assertThat(definitions.locations).hasSize(1)
+      assertThat(definitions.locations[0].range.contains(Position(6, 20))).isTrue()
+    }
+  }
+}

shared/src/main/java/com/itsaky/androidide/models/Locations.kt

@@ -145,7 +145,15 @@ constructor(
   fun compareByEnd(other: Range): Int = end.compareTo(other.end)
 
   fun contains(position: Position): Boolean {
-    return !(position.line < start.line || position.line > end.line)
+    if (position.line < start.line || position.line > end.line) {
+      return false
+    }
+
+    if (start.line == end.line) {
+      return position.column >= start.column && position.column <= end.column
+    }
+
+    return false
   }
 
   /**

testing/resources/test-project/app/src/main/resources/utils/FindHelperRegexElements_template.java

@@ -0,0 +1,16 @@
+package com.itsaky.androidide.lsp.java.test;
+
+import java.util.*;
+
+public class Main {
+
+  private String field;
+
+  public static void main(String[] args) {
+    field = "Hello World!";
+
+    System.out.println(field);
+
+    final var list = new ArrayList<String>();
+  }
+}