kconfig: qconf: make debug links work again

The Qt5 conversion broke support for debug info links.

Restore the behaviour added by changeset
ab45d190fd4a ("kconfig: create links in info window").

The original approach was to pass a pointer for a data struct
via an <a href>. That doesn't sound a good idea, as, if something
gets wrong, the app could crash. So, instead, pass the name of
the symbol, and validate such symbol at the hyperlink handling
logic.

Link: https://lore.kernel.org/lkml/20200628125421.12458086@coco.lan/
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 9def594..1fddbdf 100644 (file)
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -7,6 +7,7 @@
 #include <QAction>
 #include <QApplication>
 #include <QCloseEvent>
+#include <QDebug>
 #include <QDesktopWidget>
 #include <QFileDialog>
 #include <QLabel>
@@ -1012,7 +1013,7 @@ ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
        : Parent(parent), sym(0), _menu(0)
 {
        setObjectName(name);
-
+       setOpenLinks(false);
 
        if (!objectName().isEmpty()) {
                configSettings->beginGroup(objectName());
@@ -1085,7 +1086,7 @@ void ConfigInfoView::menuInfo(void)
                        if (sym->name) {
                                head += " (";
                                if (showDebug())
-                                       head += QString().sprintf("<a href=\"s%p\">", sym);
+                                       head += QString().sprintf("<a href=\"s%s\">", sym->name);
                                head += print_filter(sym->name);
                                if (showDebug())
                                        head += "</a>";
@@ -1094,7 +1095,7 @@ void ConfigInfoView::menuInfo(void)
                } else if (sym->name) {
                        head += "<big><b>";
                        if (showDebug())
-                               head += QString().sprintf("<a href=\"s%p\">", sym);
+                               head += QString().sprintf("<a href=\"s%s\">", sym->name);
                        head += print_filter(sym->name);
                        if (showDebug())
                                head += "</a>";
@@ -1145,7 +1146,7 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
                switch (prop->type) {
                case P_PROMPT:
                case P_MENU:
-                       debug += QString().sprintf("prompt: <a href=\"m%p\">", prop->menu);
+                       debug += QString().sprintf("prompt: <a href=\"m%s\">", sym->name);
                        debug += print_filter(prop->text);
                        debug += "</a><br>";
                        break;
@@ -1217,13 +1218,74 @@ void ConfigInfoView::expr_print_help(void *data, struct symbol *sym, const char
        QString str2 = print_filter(str);
 
        if (sym && sym->name && !(sym->flags & SYMBOL_CONST)) {
-               *text += QString().sprintf("<a href=\"s%p\">", sym);
+               *text += QString().sprintf("<a href=\"s%s\">", sym->name);
                *text += str2;
                *text += "</a>";
        } else
                *text += str2;
 }
 
+void ConfigInfoView::clicked(const QUrl &url)
+{
+       QByteArray str = url.toEncoded();
+       const std::size_t count = str.size();
+       char *data = new char[count + 1];
+       struct symbol **result;
+       struct menu *m = NULL;
+       char type;
+
+       if (count < 1) {
+               qInfo() << "Clicked link is empty";
+               delete data;
+               return;
+       }
+
+       memcpy(data, str.constData(), count);
+       data[count] = '\0';
+       type = data[0];
+
+       /* Seek for exact match */
+       data[0] = '^';
+       strcat(data, "$");
+       result = sym_re_search(data);
+       if (!result) {
+               qInfo() << "Clicked symbol is invalid:" << data;
+               delete data;
+               return;
+       }
+
+       sym = *result;
+       if (type == 's') {
+               symbolInfo();
+               emit showDebugChanged(true);
+               free(result);
+               delete data;
+               return;
+       }
+
+       /* URL is a menu */
+       for (struct property *prop = sym->prop; prop; prop = prop->next) {
+                   if (prop->type != P_PROMPT && prop->type != P_MENU)
+                           continue;
+                   m = prop->menu;
+                   break;
+       }
+
+       if (!m) {
+               qInfo() << "Clicked menu is invalid:" << data;
+               free(result);
+               delete data;
+               return;
+       }
+
+       _menu = m;
+       menuInfo();
+
+       emit showDebugChanged(true);
+       free(result);
+       delete data;
+}
+
 QMenu* ConfigInfoView::createStandardContextMenu(const QPoint & pos)
 {
        QMenu* popup = Parent::createStandardContextMenu(pos);
@@ -1497,6 +1559,9 @@ ConfigMainWindow::ConfigMainWindow(void)
        helpMenu->addAction(showIntroAction);
        helpMenu->addAction(showAboutAction);
 
+       connect (helpText, SIGNAL (anchorClicked (const QUrl &)),
+                helpText, SLOT (clicked (const QUrl &)) );
+
        connect(configList, SIGNAL(menuChanged(struct menu *)),
                helpText, SLOT(setInfo(struct menu *)));
        connect(configList, SIGNAL(menuSelected(struct menu *)),

diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index d913a02..a193137 100644 (file)
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -250,6 +250,7 @@ public slots:
        void setInfo(struct menu *menu);
        void saveSettings(void);
        void setShowDebug(bool);
+       void clicked (const QUrl &url);
 
 signals:
        void showDebugChanged(bool);