fix: boolean conversion

Author: attilaolah

src/parse/config.h

@@ -57,18 +57,18 @@ namespace pdflib
 
     j["page_boundary"] = page_boundary;
 
-    j["do_sanitization"] = do_sanitization;
+    j["do_sanitization"] = nlohmann::json(do_sanitization);
 
-    j["keep_char_cells"] = keep_char_cells;
-    j["keep_shapes"] = keep_shapes;
-    j["keep_bitmaps"] = keep_bitmaps;
+    j["keep_char_cells"] = nlohmann::json(keep_char_cells);
+    j["keep_shapes"] = nlohmann::json(keep_shapes);
+    j["keep_bitmaps"] = nlohmann::json(keep_bitmaps);
 
     j["max_num_lines"] = max_num_lines;
     j["max_num_bitmaps"] = max_num_bitmaps;
 
-    j["create_word_cells"] = create_word_cells;
-    j["create_line_cells"] = create_line_cells;
-    j["enforce_same_font"] = enforce_same_font;
+    j["create_word_cells"] = nlohmann::json(create_word_cells);
+    j["create_line_cells"] = nlohmann::json(create_line_cells);
+    j["enforce_same_font"] = nlohmann::json(enforce_same_font);
 
     j["horizontal_cell_tolerance"] = horizontal_cell_tolerance;
 
@@ -77,10 +77,10 @@ namespace pdflib
     j["line_space_width_factor_for_merge"] = line_space_width_factor_for_merge;
     j["line_space_width_factor_for_merge_with_space"] = line_space_width_factor_for_merge_with_space;
 
-    j["populate_json_objects"] = populate_json_objects;
+    j["populate_json_objects"] = nlohmann::json(populate_json_objects);
 
-    j["keep_glyphs"] = keep_glyphs;
-    j["keep_qpdf_warnings"] = keep_qpdf_warnings;
+    j["keep_glyphs"] = nlohmann::json(keep_glyphs);
+    j["keep_qpdf_warnings"] = nlohmann::json(keep_qpdf_warnings);
 
     return j;
   }

src/parse/page_item_sanitators/cells.h

@@ -118,8 +118,8 @@ namespace pdflib
 
 	  item["rendering_mode"] = cell.rendering_mode;
 
-	  item["widget"] = cell.widget;
-	  item["left_to_right"] = cell.left_to_right;
+	  item["widget"] = nlohmann::json(cell.widget);
+	  item["left_to_right"] = nlohmann::json(cell.left_to_right);
 	}
 
 	result.push_back(item);

src/parse/page_items/page_cell.h

@@ -209,10 +209,10 @@ namespace pdflib
       cell.push_back(font_key); // 17
       cell.push_back(font_name); // 18
 
-      cell.push_back(widget); // 19
-      cell.push_back(left_to_right); // 20
+      cell.push_back(nlohmann::json(widget)); // 19
+      cell.push_back(nlohmann::json(left_to_right)); // 20
 
-      cell.push_back(has_graphics_state); // 21
+      cell.push_back(nlohmann::json(has_graphics_state)); // 21
       cell.push_back(utils::values::round(line_width)); // 22
       cell.push_back(rgb_stroking_ops); // 23
       cell.push_back(rgb_filling_ops);  // 24

src/parse/page_items/page_image.h

@@ -137,7 +137,7 @@ namespace pdflib
       image.push_back(bits_per_component);
       image.push_back(color_space);
       image.push_back(intent);
-      image.push_back(has_graphics_state);
+      image.push_back(nlohmann::json(has_graphics_state));
       image.push_back(rgb_stroking_ops);
       image.push_back(rgb_filling_ops);
     }

src/parse/page_items/page_shape.h

@@ -137,7 +137,7 @@ namespace pdflib
       result["y"] = y;
       result["i"] = i;
 
-      result["has-graphics-state"] = has_graphics_state;
+      result["has-graphics-state"] = nlohmann::json(has_graphics_state);
 
       result["line-width"]  = utils::values::round(line_width);
       result["miter-limit"] = utils::values::round(miter_limit);

src/parse/qpdf/to_json.h

@@ -184,7 +184,7 @@ namespace pdflib
         else if(obj.isBool())
           {
             bool val = obj.getBoolValue();
-            result = val;
+            result = nlohmann::json(val);
           }
         else
           {