Merge g537 via gui_bech32_errpos

src/qt/bitcoinaddressvalidator.cpp

@@ -6,6 +6,8 @@
 
 #include <key_io.h>
 
+#include <vector>
+
 /* Base58 characters are:
      "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
 
@@ -20,10 +22,8 @@ BitcoinAddressEntryValidator::BitcoinAddressEntryValidator(QObject *parent) :
 {
 }
 
-QValidator::State BitcoinAddressEntryValidator::validate(QString &input, int &pos) const
+QValidator::State BitcoinAddressEntryValidator::validate(QString &input, std::vector<int>&error_locations) const
 {
-    Q_UNUSED(pos);
-
     // Empty address is "intermediate" input
     if (input.isEmpty())
         return QValidator::Intermediate;
@@ -73,6 +73,7 @@ QValidator::State BitcoinAddressEntryValidator::validate(QString &input, int &po
         }
         else
         {
+            error_locations.push_back(idx);
             state = QValidator::Invalid;
         }
     }
@@ -80,16 +81,25 @@ QValidator::State BitcoinAddressEntryValidator::validate(QString &input, int &po
     return state;
 }
 
+QValidator::State BitcoinAddressEntryValidator::validate(QString &input, int &pos) const
+{
+    std::vector<int> error_locations;
+    const auto ret = validate(input, error_locations);
+    if (!error_locations.empty()) pos = error_locations.at(0);
+    return ret;
+}
+
 BitcoinAddressCheckValidator::BitcoinAddressCheckValidator(QObject *parent) :
-    QValidator(parent)
+    BitcoinAddressEntryValidator(parent)
 {
 }
 
-QValidator::State BitcoinAddressCheckValidator::validate(QString &input, int &pos) const
+QValidator::State BitcoinAddressCheckValidator::validate(QString &input, std::vector<int>&error_locations) const
 {
-    Q_UNUSED(pos);
     // Validate the passed Bitcoin address
-    if (IsValidDestinationString(input.toStdString())) {
+    std::string error_msg;
+    CTxDestination dest = DecodeDestination(input.toStdString(), error_msg, &error_locations);
+    if (IsValidDestination(dest)) {
         return QValidator::Acceptable;
     }
 

src/qt/bitcoinaddressvalidator.h

@@ -7,6 +7,8 @@
 
 #include <QValidator>
 
+#include <vector>
+
 /** Base58 entry widget validator, checks for valid characters and
  * removes some whitespace.
  */
@@ -17,19 +19,21 @@ class BitcoinAddressEntryValidator : public QValidator
 public:
     explicit BitcoinAddressEntryValidator(QObject *parent);
 
-    State validate(QString &input, int &pos) const override;
+    virtual State validate(QString &input, std::vector<int>&error_locations) const;
+    virtual State validate(QString &input, int &pos) const override;
 };
 
 /** Bitcoin address widget validator, checks for a valid bitcoin address.
  */
-class BitcoinAddressCheckValidator : public QValidator
+class BitcoinAddressCheckValidator : public BitcoinAddressEntryValidator
 {
     Q_OBJECT
 
 public:
     explicit BitcoinAddressCheckValidator(QObject *parent);
 
-    State validate(QString &input, int &pos) const override;
+    using BitcoinAddressEntryValidator::validate;
+    State validate(QString &input, std::vector<int>&error_locations) const override;
 };
 
 #endif // BITCOIN_QT_BITCOINADDRESSVALIDATOR_H

src/qt/qvalidatedlineedit.cpp

@@ -7,6 +7,15 @@
 #include <qt/bitcoinaddressvalidator.h>
 #include <qt/guiconstants.h>
 
+#include <cmath>
+
+#include <QColor>
+#include <QCoreApplication>
+#include <QFont>
+#include <QInputMethodEvent>
+#include <QList>
+#include <QTextCharFormat>
+
 QValidatedLineEdit::QValidatedLineEdit(QWidget* parent)
     : QLineEdit(parent)
 {
@@ -24,15 +33,25 @@ void QValidatedLineEdit::setText(const QString& text)
     checkValidity();
 }
 
-void QValidatedLineEdit::setValid(bool _valid, bool with_warning)
+double ColourLuminosity(QColor c)
 {
-    if(_valid == this->valid)
+    const auto Lr = std::pow(c.redF(),   2.2) * .2126;
+    const auto Lg = std::pow(c.greenF(), 2.2) * .7152;
+    const auto Lb = std::pow(c.blueF(),  2.2) * .0722;
+    return Lr + Lg + Lb;
+}
+
+void QValidatedLineEdit::setValid(bool _valid, bool with_warning, const std::vector<int>&error_locations)
+{
+    if(_valid && this->valid)
     {
-        if (with_warning == m_has_warning || !valid) {
+        if (with_warning == m_has_warning) {
             return;
         }
     }
 
+    QList<QInputMethodEvent::Attribute> attributes;
+
     if(_valid)
     {
         m_has_warning = with_warning;
@@ -45,7 +64,38 @@ void QValidatedLineEdit::setValid(bool _valid, bool with_warning)
     else
     {
         setStyleSheet("QValidatedLineEdit { " STYLE_INVALID "}");
+        if (!error_locations.empty()) {
+            const QColor normal_text_colour = palette().color(foregroundRole());
+            const QColor bg_colour = palette().color(backgroundRole());
+            const bool dark_mode = ColourLuminosity(bg_colour) < .36;
+            QColor error_colour;
+            if (normal_text_colour.red() > normal_text_colour.green() && normal_text_colour.red() > normal_text_colour.blue()) {
+                // red is dominant, avoid fg red
+                if (bg_colour.red() > bg_colour.blue() && bg_colour.green() > bg_colour.blue()) {
+                    // bg is yellowish, fallback to blues
+                    error_colour = dark_mode ? Qt::cyan : Qt::blue;
+                } else {
+                    error_colour = dark_mode ? Qt::yellow : Qt::darkYellow;
+                }
+            } else {
+                error_colour = dark_mode ? QColor(255, 159, 159) : Qt::red;
+            }
+
+            QTextCharFormat format;
+            format.setFontUnderline(true);
+            format.setUnderlineStyle(QTextCharFormat::SpellCheckUnderline);
+            format.setUnderlineColor(error_colour);
+            format.setForeground(error_colour);
+            format.setFontWeight(QFont::Bold);
+            for (auto error_pos : error_locations) {
+                attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, error_pos - cursorPosition(), /*length=*/ 1, format));
+            }
+        }
     }
+
+    QInputMethodEvent event(QString(), attributes);
+    QCoreApplication::sendEvent(this, &event);
+
     this->valid = _valid;
 }
 
@@ -107,11 +157,20 @@ void QValidatedLineEdit::checkValidity()
         if (checkValidator)
         {
             QString address = text();
-            int pos = 0;
-            if (checkValidator->validate(address, pos) == QValidator::Acceptable)
+            QValidator::State validation_result;
+            std::vector<int> error_locations;
+            const BitcoinAddressEntryValidator * const address_validator = dynamic_cast<const BitcoinAddressEntryValidator*>(checkValidator);
+            if (address_validator) {
+                validation_result = address_validator->validate(address, error_locations);
+            } else {
+                int pos = 0;
+                validation_result = checkValidator->validate(address, pos);
+                error_locations.push_back(pos);
+            }
+            if (validation_result == QValidator::Acceptable)
                 setValid(true, has_warning);
             else
-                setValid(false);
+                setValid(/* valid= */ false, /* with_warning= */ false, error_locations);
         }
     }
     else

src/qt/qvalidatedlineedit.h

@@ -35,7 +35,7 @@ private:
 
 public Q_SLOTS:
     void setText(const QString&);
-    void setValid(bool valid, bool with_warning=false);
+    void setValid(bool valid, bool with_warning=false, const std::vector<int>&error_locations=std::vector<int>());
     void setEnabled(bool enabled);
 
 Q_SIGNALS: