tdf#141633 use css instead of pango attribs for font size

in GtkEntry. Rendering was using the font set via pango attribs, but
when measuring the mininum size gtk will use the min size of the widget
font so that has to change to allow the GtkEntry to fit the size of the
desired font

bundle together the setting-font-via-css as "WidgetFont"

Change-Id: Ic00d8b84decf528016fe47fc3b142daf3439340d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/123138
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 73 insertions, 58 deletions

diff --git a/vcl/unx/gtk3/gtkinst.cxx b/vcl/unx/gtk3/gtkinst.cxx
index 95c54ef3f669..8f116ab36523 100644
--- a/vcl/unx/gtk3/gtkinst.cxx
+++ b/vcl/unx/gtk3/gtkinst.cxx
@@ -9111,6 +9111,55 @@ public:
     }
 };
 
+class WidgetFont
+{
+private:
+    GtkWidget* m_pWidget;
+    GtkCssProvider* m_pFontCssProvider;
+    std::unique_ptr<vcl::Font> m_xFont;
+public:
+    WidgetFont(GtkWidget* pWidget)
+        : m_pWidget(pWidget)
+        , m_pFontCssProvider(nullptr)
+    {
+    }
+
+    void use_custom_font(const vcl::Font* pFont, std::u16string_view rCSSSelector)
+    {
+        GtkStyleContext *pWidgetContext = gtk_widget_get_style_context(m_pWidget);
+        if (m_pFontCssProvider)
+        {
+            gtk_style_context_remove_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider));
+            m_pFontCssProvider = nullptr;
+        }
+
+        m_xFont.reset();
+
+        if (!pFont)
+            return;
+
+        m_xFont.reset(new vcl::Font(*pFont));
+        m_pFontCssProvider = gtk_css_provider_new();
+        OUString aBuffer = rCSSSelector + OUString::Concat(" { ") + vcl_font_to_css(*pFont) + OUString::Concat(" }");
+        OString aResult = OUStringToOString(aBuffer, RTL_TEXTENCODING_UTF8);
+        css_provider_load_from_data(m_pFontCssProvider, aResult.getStr(), aResult.getLength());
+        gtk_style_context_add_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider),
+                                       GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+    }
+
+    const vcl::Font* get_custom_font() const
+    {
+        return m_xFont.get();
+    }
+
+    ~WidgetFont()
+    {
+        if (m_pFontCssProvider)
+            use_custom_font(nullptr, u"");
+        assert(!m_pFontCssProvider);
+    }
+};
+
 class GtkInstanceButton : public GtkInstanceWidget, public virtual weld::Button
 {
 private:
@@ -12215,7 +12264,7 @@ protected:
     GtkEditable* m_pEditable;
     GtkWidget* m_pDelegate;
 private:
-    std::optional<vcl::Font> m_xFont;
+    WidgetFont m_aCustomFont;
     gulong m_nChangedSignalId;
     gulong m_nInsertTextSignalId;
     gulong m_nCursorPosSignalId;
@@ -12311,6 +12360,7 @@ public:
 #else
         , m_pDelegate(pWidget)
 #endif
+        , m_aCustomFont(m_pWidget)
         , m_nChangedSignalId(g_signal_connect(m_pEditable, "changed", G_CALLBACK(signalChanged), this))
         , m_nInsertTextSignalId(g_signal_connect(m_pEditable, "insert-text", G_CALLBACK(signalInsertText), this))
         , m_nCursorPosSignalId(g_signal_connect(m_pEditable, "notify::cursor-position", G_CALLBACK(signalCursorPosition), this))
@@ -12471,18 +12521,13 @@ public:
 
     virtual void set_font(const vcl::Font& rFont) override
     {
-        m_xFont = rFont;
-        PangoAttrList* pOrigList = get_attributes();
-        PangoAttrList* pAttrList = pOrigList ? pango_attr_list_copy(pOrigList) : pango_attr_list_new();
-        update_attr_list(pAttrList, rFont);
-        set_attributes(pAttrList);
-        pango_attr_list_unref(pAttrList);
+        m_aCustomFont.use_custom_font(&rFont, u"entry");
     }
 
     virtual vcl::Font get_font() override
     {
-        if (m_xFont)
-            return *m_xFont;
+        if (const vcl::Font* pFont = m_aCustomFont.get_custom_font())
+            return *pFont;
         return GtkInstanceWidget::get_font();
     }
 
@@ -16513,8 +16558,7 @@ private:
     GtkTextBuffer* m_pTextBuffer;
     GtkAdjustment* m_pVAdjustment;
     GtkCssProvider* m_pFgCssProvider;
-    GtkCssProvider* m_pFontCssProvider;
-    std::optional<vcl::Font> m_xFont;
+    WidgetFont m_aCustomFont;
     int m_nMaxTextLength;
     gulong m_nChangedSignalId; // we don't disable/enable this one, it's to implement max-length
     gulong m_nInsertTextSignalId;
@@ -16606,7 +16650,7 @@ public:
         , m_pTextBuffer(gtk_text_view_get_buffer(pTextView))
         , m_pVAdjustment(gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(pTextView)))
         , m_pFgCssProvider(nullptr)
-        , m_pFontCssProvider(nullptr)
+        , m_aCustomFont(m_pWidget)
         , m_nMaxTextLength(0)
         , m_nChangedSignalId(g_signal_connect(m_pTextBuffer, "changed", G_CALLBACK(signalChanged), this))
         , m_nInsertTextSignalId(g_signal_connect_after(m_pTextBuffer, "insert-text", G_CALLBACK(signalInserText), this))
@@ -16721,25 +16765,16 @@ public:
                                        GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
     }
 
-    virtual vcl::Font get_font() override
+    virtual void set_font(const vcl::Font& rFont) override
     {
-        if (m_xFont)
-            return *m_xFont;
-        return GtkInstanceWidget::get_font();
+        m_aCustomFont.use_custom_font(&rFont, u"textview");
     }
 
-    virtual void set_font(const vcl::Font& rFont) override
+    virtual vcl::Font get_font() override
     {
-        m_xFont = rFont;
-        GtkStyleContext *pWidgetContext = gtk_widget_get_style_context(GTK_WIDGET(m_pTextView));
-        if (m_pFontCssProvider)
-            gtk_style_context_remove_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider));
-        m_pFontCssProvider = gtk_css_provider_new();
-        OUString aBuffer = "textview { " + vcl_font_to_css(rFont) +  "}";
-        OString aResult = OUStringToOString(aBuffer, RTL_TEXTENCODING_UTF8);
-        css_provider_load_from_data(m_pFontCssProvider, aResult.getStr(), aResult.getLength());
-        gtk_style_context_add_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider),
-                                       GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+        if (const vcl::Font* pFont = m_aCustomFont.get_custom_font())
+            return *pFont;
+        return GtkInstanceWidget::get_font();
     }
 
     virtual void disable_notify_events() override
@@ -17604,13 +17639,12 @@ private:
     GtkWidget* m_pEntry;
     GtkEditable* m_pEditable;
 //    GtkCellView* m_pCellView;
-    GtkCssProvider* m_pFontCssProvider;
     GtkEventController* m_pKeyController;
     GtkEventController* m_pEntryKeyController;
     GtkEventController* m_pMenuKeyController;
     GtkEventController* m_pEntryFocusController;
 //    std::unique_ptr<CustomRenderMenuButtonHelper> m_xCustomMenuButtonHelper;
-    std::optional<vcl::Font> m_xFont;
+    WidgetFont m_aCustomFont;
     std::optional<vcl::Font> m_xEntryFont;
     std::unique_ptr<comphelper::string::NaturalStringSorter> m_xSorter;
     vcl::QuickSelectionEngine m_aQuickSelectionEngine;
@@ -18648,7 +18682,7 @@ public:
 //        , m_pToggleButton(GTK_WIDGET(gtk_builder_get_object(pComboBuilder, "button")))
         , m_pEntry(GTK_IS_ENTRY(gtk_combo_box_get_child(pComboBox)) ? gtk_combo_box_get_child(pComboBox) : nullptr)
         , m_pEditable(GTK_EDITABLE(m_pEntry))
-        , m_pFontCssProvider(nullptr)
+        , m_aCustomFont(m_pWidget)
 //        , m_pCellView(nullptr)
         , m_aQuickSelectionEngine(*this)
 //        , m_bHoverSelection(false)
@@ -19031,22 +19065,13 @@ public:
 
     virtual void set_font(const vcl::Font& rFont) override
     {
-        m_xFont = rFont;
-        GtkStyleContext *pWidgetContext = gtk_widget_get_style_context(GTK_WIDGET(m_pComboBox));
-        if (m_pFontCssProvider)
-            gtk_style_context_remove_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider));
-        m_pFontCssProvider = gtk_css_provider_new();
-        OUString aBuffer = "combobox { " + vcl_font_to_css(rFont) +  "}";
-        OString aResult = OUStringToOString(aBuffer, RTL_TEXTENCODING_UTF8);
-        css_provider_load_from_data(m_pFontCssProvider, aResult.getStr(), aResult.getLength());
-        gtk_style_context_add_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider),
-                                       GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+        m_aCustomFont.use_custom_font(&rFont, u"combobox");
     }
 
     virtual vcl::Font get_font() override
     {
-        if (m_xFont)
-            return *m_xFont;
+        if (const vcl::Font* pFont = m_aCustomFont.get_custom_font())
+            return *pFont;
         return GtkInstanceWidget::get_font();
     }
 
@@ -19381,9 +19406,8 @@ private:
     GtkWidget* m_pToggleButton;
     GtkWidget* m_pEntry;
     GtkCellView* m_pCellView;
-    GtkCssProvider* m_pFontCssProvider;
+    WidgetFont m_aCustomFont;
     std::unique_ptr<CustomRenderMenuButtonHelper> m_xCustomMenuButtonHelper;
-    std::optional<vcl::Font> m_xFont;
     std::optional<vcl::Font> m_xEntryFont;
     std::unique_ptr<comphelper::string::NaturalStringSorter> m_xSorter;
     vcl::QuickSelectionEngine m_aQuickSelectionEngine;
@@ -20421,7 +20445,7 @@ public:
         , m_pToggleButton(GTK_WIDGET(gtk_builder_get_object(pComboBuilder, "button")))
         , m_pEntry(GTK_WIDGET(gtk_builder_get_object(pComboBuilder, "entry")))
         , m_pCellView(nullptr)
-        , m_pFontCssProvider(nullptr)
+        , m_aCustomFont(m_pWidget)
         , m_aQuickSelectionEngine(*this)
         , m_bHoverSelection(false)
         , m_bMouseInOverlayButton(false)
@@ -20840,23 +20864,14 @@ public:
 
     virtual void set_font(const vcl::Font& rFont) override
     {
-        m_xFont = rFont;
-        GtkStyleContext *pWidgetContext = gtk_widget_get_style_context(GTK_WIDGET(getContainer()));
-        if (m_pFontCssProvider)
-            gtk_style_context_remove_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider));
-        m_pFontCssProvider = gtk_css_provider_new();
-        OUString aBuffer = "box#combobox { " + vcl_font_to_css(rFont) +  "}";
-        OString aResult = OUStringToOString(aBuffer, RTL_TEXTENCODING_UTF8);
-        css_provider_load_from_data(m_pFontCssProvider, aResult.getStr(), aResult.getLength());
-        gtk_style_context_add_provider(pWidgetContext, GTK_STYLE_PROVIDER(m_pFontCssProvider),
-                                       GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+        m_aCustomFont.use_custom_font(&rFont, u"box#combobox");
     }
 
     virtual vcl::Font get_font() override
     {
-        if (m_xFont)
-            return *m_xFont;
-        return GtkInstanceContainer::get_font();
+        if (const vcl::Font* pFont = m_aCustomFont.get_custom_font())
+            return *pFont;
+        return GtkInstanceWidget::get_font();
     }
 
     virtual void set_entry_font(const vcl::Font& rFont) override