General code cleanups

* Use default member initializers
* Use range-based loops
* Don't use 'else' after 'return'
* Removed some unused includes
* Construct empty strings with std::string() instead of ""
* Clear strings with .clear() instead of assigning ""
* Check whether strings are empty with .empty() instead of comparing to ""
* Removed redundant initializations

28 files changed, 48 insertions, 60 deletions

diff --git a/src/gui/beingpopup.cpp b/src/gui/beingpopup.cpp
index 56faed39..9cb585db 100644
--- a/src/gui/beingpopup.cpp
+++ b/src/gui/beingpopup.cpp
@@ -53,9 +53,7 @@ BeingPopup::BeingPopup():
     add(mBeingParty);
 }
 
-BeingPopup::~BeingPopup()
-{
-}
+BeingPopup::~BeingPopup() = default;
 
 void BeingPopup::show(int x, int y, Being *b)
 {
@@ -84,7 +82,7 @@ void BeingPopup::show(int x, int y, Being *b)
     }
     else
     {
-        mBeingParty->setCaption("");
+        mBeingParty->setCaption(std::string());
         setContentSize(minWidth + 10, height + 10);
     }
 
diff --git a/src/gui/charcreatedialog.cpp b/src/gui/charcreatedialog.cpp
index 8cec4279..fd27c89c 100644
--- a/src/gui/charcreatedialog.cpp
+++ b/src/gui/charcreatedialog.cpp
@@ -71,7 +71,7 @@ CharCreateDialog::CharCreateDialog(CharSelectDialog *parent, int slot):
 
     updateHair();
 
-    mNameField = new TextField("");
+    mNameField = new TextField(std::string());
     mNameLabel = new Label(_("Name:"));
 
     mNextHairColorButton = new Button("", "nextcolor", this);
diff --git a/src/gui/charselectdialog.cpp b/src/gui/charselectdialog.cpp
index 02a89ff2..4bd712f6 100644
--- a/src/gui/charselectdialog.cpp
+++ b/src/gui/charselectdialog.cpp
@@ -345,9 +345,9 @@ CharacterDisplay::CharacterDisplay(CharSelectDialog *charSelectDialog):
     mPlayerBox(new PlayerBox)
 {
     mButton = new Button("", "go", charSelectDialog);
-    mName = new Label("");
-    mLevel = new Label("");
-    mMoney = new Label("");
+    mName = new Label(std::string());
+    mLevel = new Label(std::string());
+    mMoney = new Label(std::string());
 
     mDelete = new Button(_("Delete"), "delete", charSelectDialog);
 
diff --git a/src/gui/chatwindow.cpp b/src/gui/chatwindow.cpp
index e1bbed5f..d51c3a25 100644
--- a/src/gui/chatwindow.cpp
+++ b/src/gui/chatwindow.cpp
@@ -22,18 +22,14 @@
 #include "chatwindow.h"
 
 #include "actorspritemanager.h"
-#include "channel.h"
 #include "channelmanager.h"
 #include "configuration.h"
 #include "localplayer.h"
-#include "party.h"
 #include "playerrelations.h"
 
 #include "gui/recorder.h"
 #include "gui/setup.h"
-#include "gui/sdlinput.h"
 
-#include "gui/widgets/channeltab.h"
 #include "gui/widgets/chattab.h"
 #include "gui/widgets/itemlinkhandler.h"
 #include "gui/widgets/layout.h"
@@ -45,7 +41,6 @@
 #include "net/chathandler.h"
 #include "net/net.h"
 
-#include "utils/dtor.h"
 #include "utils/gettext.h"
 #include "utils/stringutils.h"
 
@@ -199,7 +194,7 @@ void ChatWindow::action(const gcn::ActionEvent &event)
             chatInput(message);
 
             // Clear the text from the chat input
-            mChatInput->setText("");
+            mChatInput->setText(std::string());
         }
 
         if (message.empty() || !mReturnToggles)
@@ -294,7 +289,7 @@ void ChatWindow::chatInput(const std::string &msg)
 
 void ChatWindow::doPresent()
 {
-    std::string response = "";
+    std::string response;
     int playercount = 0;
 
     for (auto actor : actorSpriteManager->getAll())
diff --git a/src/gui/connectiondialog.cpp b/src/gui/connectiondialog.cpp
index 963005cf..2ff68a15 100644
--- a/src/gui/connectiondialog.cpp
+++ b/src/gui/connectiondialog.cpp
@@ -32,7 +32,7 @@
 
 ConnectionDialog::ConnectionDialog(const std::string &text,
                                    State cancelState):
-    Window(""),
+    Window(std::string()),
     mCancelState(cancelState)
 {
     setTitleBarHeight(0);
diff --git a/src/gui/debugwindow.cpp b/src/gui/debugwindow.cpp
index 43d84f61..047e4170 100644
--- a/src/gui/debugwindow.cpp
+++ b/src/gui/debugwindow.cpp
@@ -59,12 +59,12 @@ public:
             mFPSText = _("%d FPS");
         }
 
-        mFPSLabel = new Label("");
-        mMusicFileLabel = new Label("");
-        mMapLabel = new Label("");
-        mMinimapLabel = new Label("");
-        mTileMouseLabel = new Label("");
-        mParticleCountLabel = new Label("");
+        mFPSLabel = new Label(std::string());
+        mMusicFileLabel = new Label(std::string());
+        mMapLabel = new Label(std::string());
+        mMinimapLabel = new Label(std::string());
+        mTileMouseLabel = new Label(std::string());
+        mParticleCountLabel = new Label(std::string());
 
         LayoutHelper h(this);
         ContainerPlacer place = h.getPlacer(0, 0);
diff --git a/src/gui/minimap.cpp b/src/gui/minimap.cpp
index 7d6cc618..4a940254 100644
--- a/src/gui/minimap.cpp
+++ b/src/gui/minimap.cpp
@@ -73,7 +73,7 @@ Minimap::~Minimap()
 void Minimap::setMap(Map *map)
 {
     // Set the title for the Minimap
-    std::string caption = "";
+    std::string caption;
     std::string minimapName;
 
     if (map)
diff --git a/src/gui/npcdialog.cpp b/src/gui/npcdialog.cpp
index 13e1ac0d..0ad9e959 100644
--- a/src/gui/npcdialog.cpp
+++ b/src/gui/npcdialog.cpp
@@ -106,7 +106,7 @@ NpcDialog::NpcDialog(int npcId)
     mItemList->setVisible(true);
 
     // Setup string input box
-    mTextField = new TextField("");
+    mTextField = new TextField(std::string());
     mTextField->setVisible(true);
 
     // Setup int input box
@@ -211,7 +211,7 @@ void NpcDialog::action(const gcn::ActionEvent &event)
         }
         else if (mActionState == NPC_ACTION_INPUT)
         {
-            std::string printText = "";  // Text that will get printed in the textbox
+            std::string printText;  // Text that will get printed in the textbox
 
             if (mInputState == NPC_INPUT_LIST)
             {
@@ -243,7 +243,7 @@ void NpcDialog::action(const gcn::ActionEvent &event)
         }
 
         if (!mLogInteraction)
-            setText("");
+            setText(std::string());
     }
     else if (event.getId() == "reset")
     {
@@ -569,7 +569,7 @@ void NpcEventListener::event(Event::Channel channel,
         }
         catch (BadEvent)
         {
-            dialog->textRequest("");
+            dialog->textRequest(std::string());
         }
     }
     else if (event.getType() == Event::Next)
diff --git a/src/gui/npcdialog.h b/src/gui/npcdialog.h
index fc0325a4..36fda2b1 100644
--- a/src/gui/npcdialog.h
+++ b/src/gui/npcdialog.h
@@ -124,7 +124,7 @@ class NpcDialog : public Window,
         /**
          * Requests a text string from the user.
          */
-        void textRequest(const std::string &defaultText = "");
+        void textRequest(const std::string &defaultText = std::string());
 
         bool isInputFocused() const;
 
diff --git a/src/gui/outfitwindow.cpp b/src/gui/outfitwindow.cpp
index d1e060f0..0c37af19 100644
--- a/src/gui/outfitwindow.cpp
+++ b/src/gui/outfitwindow.cpp
@@ -118,7 +118,7 @@ void OutfitWindow::save()
         }
         config.setValue("Outfit" + toString(o), outfitStr);
         config.setValue("OutfitUnequip" + toString(o), mItemsUnequip[o]);
-        outfitStr = "";
+        outfitStr.clear();
     }
 }
 
diff --git a/src/gui/recorder.cpp b/src/gui/recorder.cpp
index 566b160c..07bc5fcd 100644
--- a/src/gui/recorder.cpp
+++ b/src/gui/recorder.cpp
@@ -115,5 +115,5 @@ void Recorder::setRecordingFile(const std::string &msg)
 
 void Recorder::action(const gcn::ActionEvent &event)
 {
-    setRecordingFile("");
+    setRecordingFile(std::string());
 }
diff --git a/src/gui/register.cpp b/src/gui/register.cpp
index e394e59b..b57ee975 100644
--- a/src/gui/register.cpp
+++ b/src/gui/register.cpp
@@ -209,8 +209,8 @@ void RegisterDialog::action(const gcn::ActionEvent &event)
             else if (error == 2)
             {
                 // Reset password confirmation
-                mPasswordField->setText("");
-                mConfirmField->setText("");
+                mPasswordField->setText(std::string());
+                mConfirmField->setText(std::string());
 
                 mWrongDataNoticeListener->setTarget(this->mPasswordField);
             }
diff --git a/src/gui/setup_colors.cpp b/src/gui/setup_colors.cpp
index 9862ee11..69420496 100644
--- a/src/gui/setup_colors.cpp
+++ b/src/gui/setup_colors.cpp
@@ -169,7 +169,7 @@ Setup_Colors::Setup_Colors() :
     place(3, 11, mGradDelaySlider);
     place(5, 11, mGradDelayText).setPadding(1);
 
-    mGradTypeText->setCaption("");
+    mGradTypeText->setCaption(std::string());
 }
 
 Setup_Colors::~Setup_Colors()
diff --git a/src/gui/setup_interface.cpp b/src/gui/setup_interface.cpp
index 619a250c..3697285c 100644
--- a/src/gui/setup_interface.cpp
+++ b/src/gui/setup_interface.cpp
@@ -113,7 +113,7 @@ Setup_Interface::Setup_Interface():
     mPickupParticleCheckBox(new CheckBox(_("as particle"),
                                          mPickupParticleEnabled)),
     mSpeechSlider(new Slider(0, 3)),
-    mSpeechLabel(new Label("")),
+    mSpeechLabel(new Label(std::string())),
     mAlphaSlider(new Slider(0.2, 1.0)),
     mFontSize(config.getIntValue("fontSize"))
 {
diff --git a/src/gui/setup_video.h b/src/gui/setup_video.h
index 1352aa53..6c902bb7 100644
--- a/src/gui/setup_video.h
+++ b/src/gui/setup_video.h
@@ -22,7 +22,6 @@
 #ifndef GUI_SETUP_VIDEO_H
 #define GUI_SETUP_VIDEO_H
 
-#include "being.h"
 #include "guichanfwd.h"
 
 #include "gui/widgets/setuptab.h"
diff --git a/src/gui/shortcutwindow.cpp b/src/gui/shortcutwindow.cpp
index 26f1e928..e13dcd74 100644
--- a/src/gui/shortcutwindow.cpp
+++ b/src/gui/shortcutwindow.cpp
@@ -21,8 +21,6 @@
 
 #include "gui/shortcutwindow.h"
 
-#include "configuration.h"
-
 #include "gui/setup.h"
 
 #include "gui/widgets/layout.h"
diff --git a/src/gui/skilldialog.cpp b/src/gui/skilldialog.cpp
index 6ec7f011..96a57e54 100644
--- a/src/gui/skilldialog.cpp
+++ b/src/gui/skilldialog.cpp
@@ -333,7 +333,7 @@ void SkillDialog::loadSkills()
             auto *skill = new SkillInfo;
             skill->id = 1;
             skill->name = "basic";
-            skill->setIcon("");
+            skill->setIcon(std::string());
             skill->modifiable = true;
             skill->visible = true;
             skill->model = model;
diff --git a/src/gui/socialwindow.cpp b/src/gui/socialwindow.cpp
index 3fda9aa0..96a9c389 100644
--- a/src/gui/socialwindow.cpp
+++ b/src/gui/socialwindow.cpp
@@ -360,7 +360,7 @@ SocialWindow::~SocialWindow()
         mPartyAcceptDialog->scheduleDelete();
         mPartyAcceptDialog = nullptr;
 
-        mPartyInviter = "";
+        mPartyInviter.clear();
     }
     delete mCreatePopup;
 }
@@ -445,7 +445,7 @@ void SocialWindow::action(const gcn::ActionEvent &event)
             Net::getPartyHandler()->inviteResponse(mPartyInviter, false);
         }
 
-        mPartyInviter = "";
+        mPartyInviter.clear();
         mPartyAcceptDialog = nullptr;
     }
     else if (event.getSource() == mGuildAcceptDialog)
diff --git a/src/gui/socialwindow.h b/src/gui/socialwindow.h
index 495d9b54..7ffcec78 100644
--- a/src/gui/socialwindow.h
+++ b/src/gui/socialwindow.h
@@ -70,7 +70,7 @@ public:
     void showGuildCreate();
 
     void showPartyInvite(const std::string &inviter,
-                         const std::string &partyName = "");
+                         const std::string &partyName = std::string());
 
     void showPartyCreate();
 
diff --git a/src/gui/tradewindow.cpp b/src/gui/tradewindow.cpp
index cf237d5a..7094da26 100644
--- a/src/gui/tradewindow.cpp
+++ b/src/gui/tradewindow.cpp
@@ -165,7 +165,7 @@ void TradeWindow::reset()
     mOkMe = false;
     setMoney(0);
     mMoneyField->setEnabled(true);
-    mMoneyField->setText("");
+    mMoneyField->setText(std::string());
     mAddButton->setEnabled(true);
     mMoneyChangeButton->setEnabled(true);
     setStatus(PREPARING);
@@ -219,7 +219,7 @@ void TradeWindow::setStatus(Status s)
             break;
         case PROPOSING:
             mOkButton->setCaption(CAPTION_CONFIRMED);
-            mOkButton->setActionEventId("");
+            mOkButton->setActionEventId(std::string());
             break;
         case ACCEPTING:
             mOkButton->setCaption(CAPTION_ACCEPT);
@@ -227,7 +227,7 @@ void TradeWindow::setStatus(Status s)
             break;
         case ACCEPTED:
             mOkButton->setCaption(CAPTION_ACCEPTED);
-            mOkButton->setActionEventId("");
+            mOkButton->setActionEventId(std::string());
             break;
         default:
             break;
diff --git a/src/gui/updaterwindow.cpp b/src/gui/updaterwindow.cpp
index 728b2464..2861f973 100644
--- a/src/gui/updaterwindow.cpp
+++ b/src/gui/updaterwindow.cpp
@@ -101,7 +101,7 @@ std::vector<UpdateFile> loadTxtFile(const std::string &fileName)
             thisFile.hash = hash;
             thisFile.type = "data";
             thisFile.required = true;
-            thisFile.desc = "";
+            thisFile.desc.clear();
 
             if (!thisFile.name.empty())
                 files.push_back(thisFile);
@@ -402,7 +402,7 @@ void UpdaterWindow::logic()
     {
         case UPDATE_ERROR:
             // TODO: Only send complete sentences to gettext
-            mBrowserBox->addRow("");
+            mBrowserBox->addRow(std::string());
             mBrowserBox->addRow(_("##1  The update process is incomplete."));
             // TRANSLATORS: Continues "you try again later.".
             mBrowserBox->addRow(_("##1  It is strongly recommended that"));
diff --git a/src/gui/widgets/chattab.cpp b/src/gui/widgets/chattab.cpp
index 166ad102..5975684d 100644
--- a/src/gui/widgets/chattab.cpp
+++ b/src/gui/widgets/chattab.cpp
@@ -120,7 +120,6 @@ void ChatTab::chatLog(std::string line, Own own, bool ignoreRecord)
 
     CHATLOG tmp;
     tmp.own = own;
-    tmp.nick = "";
     tmp.text = line;
 
     std::string::size_type pos = line.find(" : ");
@@ -181,7 +180,7 @@ void ChatTab::chatLog(std::string line, Own own, bool ignoreRecord)
             lineColor = "##S";
             break;
         case BY_CHANNEL:
-            tmp.nick = "";
+            tmp.nick.clear();
             // TODO: Use a predefined color
             lineColor = "##2"; // Equiv. to BrowserBox::GREEN
             break;
@@ -193,7 +192,7 @@ void ChatTab::chatLog(std::string line, Own own, bool ignoreRecord)
             lineColor = "##I";
             break;
         case BY_LOGGER:
-            tmp.nick = "";
+            tmp.nick.clear();
             tmp.text = line;
             lineColor = "##L";
             break;
@@ -201,7 +200,7 @@ void ChatTab::chatLog(std::string line, Own own, bool ignoreRecord)
 
     if (tmp.nick == ": ")
     {
-        tmp.nick = "";
+        tmp.nick.clear();
         lineColor = "##S";
     }
 
diff --git a/src/gui/widgets/popup.h b/src/gui/widgets/popup.h
index 2aaa63f7..c77bf814 100644
--- a/src/gui/widgets/popup.h
+++ b/src/gui/widgets/popup.h
@@ -55,7 +55,7 @@ class Popup : public Container, public gcn::MouseListener
          *                debugging purposes.
          * @param skin    The location where the Popup's skin XML can be found.
          */
-        Popup(const std::string &name = "",
+        Popup(const std::string &name = std::string(),
               const std::string &skin = "window.xml");
 
         /**
diff --git a/src/gui/widgets/progressbar.h b/src/gui/widgets/progressbar.h
index d7289816..2f9e665f 100644
--- a/src/gui/widgets/progressbar.h
+++ b/src/gui/widgets/progressbar.h
@@ -116,7 +116,7 @@ class ProgressBar : public gcn::Widget
          */
         static void render(Graphics *graphics, const gcn::Rectangle &area,
                            const gcn::Color &color, float progress,
-                           const std::string &text = "");
+                           const std::string &text = std::string());
 
     private:
         float mProgress, mProgressToGo;
diff --git a/src/gui/widgets/textbox.cpp b/src/gui/widgets/textbox.cpp
index ac1c22c9..419fa16e 100644
--- a/src/gui/widgets/textbox.cpp
+++ b/src/gui/widgets/textbox.cpp
@@ -112,7 +112,7 @@ void TextBox::setTextWrapped(const std::string &text, int minDimension)
                 {
                     mMinWidth = minWidth;
                     wrappedStream.clear();
-                    wrappedStream.str("");
+                    wrappedStream.str(std::string());
                     spacePos = 0;
                     lastNewlinePos = 0;
                     newlinePos = text.find("\n", lastNewlinePos);
diff --git a/src/gui/widgets/textfield.cpp b/src/gui/widgets/textfield.cpp
index 872227ea..3e1665d3 100644
--- a/src/gui/widgets/textfield.cpp
+++ b/src/gui/widgets/textfield.cpp
@@ -207,14 +207,14 @@ void TextField::keyPressed(gcn::KeyEvent &keyEvent)
                 }
                 else
                 {
-                    setText("");
+                    setText(std::string());
                     mHistory->current = prevHist;
                 }
             }
             else if (!getText().empty())
             {
                 // Always clear (easy access to useful function)
-                setText("");
+                setText(std::string());
             }
         } break;
 
diff --git a/src/gui/widgets/textfield.h b/src/gui/widgets/textfield.h
index bb39810b..3b997ba8 100644
--- a/src/gui/widgets/textfield.h
+++ b/src/gui/widgets/textfield.h
@@ -65,7 +65,7 @@ struct TextHistory
 
 class AutoCompleteLister {
 public:
-    virtual ~AutoCompleteLister() {}
+    virtual ~AutoCompleteLister() = default;
     virtual void getAutoCompleteList(std::vector<std::string>&) const {}
 };
 
@@ -80,7 +80,8 @@ class TextField : public gcn::TextField
         /**
          * Constructor, initializes the text field with the given string.
          */
-        TextField(const std::string &text = "", bool loseFocusOnTab = true);
+        TextField(const std::string &text = std::string(),
+                  bool loseFocusOnTab = true);
         ~TextField() override;
 
         /**
diff --git a/src/gui/widgets/windowcontainer.h b/src/gui/widgets/windowcontainer.h
index 3e01bb36..646e5d00 100644
--- a/src/gui/widgets/windowcontainer.h
+++ b/src/gui/widgets/windowcontainer.h
@@ -55,9 +55,7 @@ class WindowContainer : public Container
         /**
          * List of widgets that are scheduled to be deleted.
          */
-        using Widgets = std::list<gcn::Widget *>;
-        using WidgetIterator = Widgets::iterator;
-        Widgets mDeathList;
+        std::list<gcn::Widget *> mDeathList;
 };
 
 extern WindowContainer *windowContainer;