renderer: render fonts with pango, add global `font_family` config option (#6138)

1 files changed, 52 insertions, 57 deletions

diff --git a/src/debug/HyprNotificationOverlay.cpp b/src/debug/HyprNotificationOverlay.cpp
index 80c80601..e1fc810b 100644
--- a/src/debug/HyprNotificationOverlay.cpp
+++ b/src/debug/HyprNotificationOverlay.cpp
@@ -1,6 +1,20 @@
+#include <numeric>
+#include <pango/pangocairo.h>
 #include "HyprNotificationOverlay.hpp"
 #include "../Compositor.hpp"
-#include <pango/pangocairo.h>
+#include "../config/ConfigValue.hpp"
+
+inline auto iconBackendFromLayout(PangoLayout* layout) {
+    // preference: Nerd > FontAwesome > text
+    auto eIconBackendChecks = std::array<eIconBackend, 2>{ICONS_BACKEND_NF, ICONS_BACKEND_FA};
+    for (auto iconID : eIconBackendChecks) {
+        auto iconsText = std::accumulate(ICONS_ARRAY[iconID].begin(), ICONS_ARRAY[iconID].end(), std::string());
+        pango_layout_set_text(layout, iconsText.c_str(), -1);
+        if (pango_layout_get_unknown_glyphs_count(layout) == 0)
+            return iconID;
+    }
+    return ICONS_BACKEND_NONE;
+}
 
 CHyprNotificationOverlay::CHyprNotificationOverlay() {
     static auto P = g_pHookSystem->hookDynamic("focusedMon", [&](void* self, SCallbackInfo& info, std::any param) {
@@ -9,31 +23,6 @@ CHyprNotificationOverlay::CHyprNotificationOverlay() {
 
         g_pHyprRenderer->damageBox(&m_bLastDamage);
     });
-
-    // check for the icon backend
-    std::string fonts      = execAndGet("fc-list");
-    std::string fontsLower = fonts;
-    std::transform(fontsLower.begin(), fontsLower.end(), fontsLower.begin(), [&](char& i) { return std::tolower(i); });
-
-    size_t index = 0;
-
-    if (index = fontsLower.find("nerd"); index != std::string::npos) {
-        m_eIconBackend = ICONS_BACKEND_NF;
-    } else if (index = fontsLower.find("font awesome"); index != std::string::npos) {
-        m_eIconBackend = ICONS_BACKEND_FA;
-    } else if (index = fontsLower.find("fontawesome"); index != std::string::npos) {
-        m_eIconBackend = ICONS_BACKEND_FA;
-    } else {
-        return;
-    }
-
-    const auto LASTNEWLINE = fonts.find_last_of('\n', index);
-    const auto COLON       = fonts.find(':', LASTNEWLINE);
-    const auto COMMA       = fonts.find(',', COLON);
-    const auto NEWLINE     = fonts.find('\n', COLON);
-    const auto LASTCHAR    = COMMA < NEWLINE ? COMMA : NEWLINE;
-
-    m_szIconFontName = fonts.substr(COLON + 2, LASTCHAR - (COLON + 2));
 }
 
 CHyprNotificationOverlay::~CHyprNotificationOverlay() {
@@ -81,25 +70,24 @@ CBox CHyprNotificationOverlay::drawNotifications(CMonitor* pMonitor) {
     float                 offsetY  = 10;
     float                 maxWidth = 0;
 
-    const auto            SCALE = pMonitor->scale;
-
+    const auto            SCALE   = pMonitor->scale;
     const auto            MONSIZE = pMonitor->vecTransformedSize;
 
-    cairo_text_extents_t  cairoExtents;
-    int                   iconW = 0, iconH = 0;
+    static auto           fontFamily = CConfigValue<std::string>("misc:font_family");
 
-    cairo_select_font_face(m_pCairo, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
+    PangoLayout*          layout  = pango_cairo_create_layout(m_pCairo);
+    PangoFontDescription* pangoFD = pango_font_description_new();
 
-    const auto PBEZIER = g_pAnimationManager->getBezier("default");
+    pango_font_description_set_family(pangoFD, (*fontFamily).c_str());
+    pango_font_description_set_style(pangoFD, PANGO_STYLE_NORMAL);
+    pango_font_description_set_weight(pangoFD, PANGO_WEIGHT_NORMAL);
 
-    for (auto& notif : m_dNotifications) {
-        const auto            ICONPADFORNOTIF = notif->icon == ICON_NONE ? 0 : ICON_PAD;
-        const auto            FONTSIZE        = std::clamp((int)(notif->fontSize * ((pMonitor->vecPixelSize.x * SCALE) / 1920.f)), 8, 40);
+    const auto iconBackendID = iconBackendFromLayout(layout);
+    const auto PBEZIER       = g_pAnimationManager->getBezier("default");
 
-        PangoLayout*          pangoLayout = pango_cairo_create_layout(m_pCairo);
-        PangoFontDescription* pangoFD     = pango_font_description_from_string(("Sans " + std::to_string(FONTSIZE * ICON_SCALE)).c_str());
-        pango_layout_set_font_description(pangoLayout, pangoFD);
-        cairo_set_font_size(m_pCairo, FONTSIZE);
+    for (auto& notif : m_dNotifications) {
+        const auto ICONPADFORNOTIF = notif->icon == ICON_NONE ? 0 : ICON_PAD;
+        const auto FONTSIZE        = std::clamp((int)(notif->fontSize * ((pMonitor->vecPixelSize.x * SCALE) / 1920.f)), 8, 40);
 
         // first rect (bg, col)
         const float FIRSTRECTANIMP =
@@ -122,31 +110,37 @@ CBox CHyprNotificationOverlay::drawNotifications(CMonitor* pMonitor) {
         const float THIRDRECTPERC = notif->started.getMillis() / notif->timeMs;
 
         // get text size
-        cairo_text_extents(m_pCairo, notif->text.c_str(), &cairoExtents);
-        const auto ICON      = ICONS_ARRAY[m_eIconBackend][notif->icon];
+        const auto ICON      = ICONS_ARRAY[iconBackendID][notif->icon];
         const auto ICONCOLOR = ICONS_COLORS[notif->icon];
-        pango_layout_set_text(pangoLayout, ICON.c_str(), -1);
-        pango_layout_set_font_description(pangoLayout, pangoFD);
-        pango_cairo_update_layout(m_pCairo, pangoLayout);
-        pango_layout_get_size(pangoLayout, &iconW, &iconH);
+
+        int        iconW = 0, iconH = 0;
+        pango_font_description_set_absolute_size(pangoFD, PANGO_SCALE * FONTSIZE * ICON_SCALE);
+        pango_layout_set_font_description(layout, pangoFD);
+        pango_layout_set_text(layout, ICON.c_str(), -1);
+        pango_layout_get_size(layout, &iconW, &iconH);
         iconW /= PANGO_SCALE;
         iconH /= PANGO_SCALE;
 
-        cairo_set_source_rgba(m_pCairo, notif->color.r, notif->color.g, notif->color.b, notif->color.a);
+        int textW = 0, textH = 0;
+        pango_font_description_set_absolute_size(pangoFD, PANGO_SCALE * FONTSIZE);
+        pango_layout_set_font_description(layout, pangoFD);
+        pango_layout_set_text(layout, notif->text.c_str(), -1);
+        pango_layout_get_size(layout, &textW, &textH);
+        textW /= PANGO_SCALE;
+        textH /= PANGO_SCALE;
 
-        const auto NOTIFSIZE = Vector2D{cairoExtents.width + 20 + iconW + 2 * ICONPADFORNOTIF, cairoExtents.height + 10};
+        const auto NOTIFSIZE = Vector2D{textW + 20 + iconW + 2 * ICONPADFORNOTIF, textH + 10};
 
         // draw rects
+        cairo_set_source_rgba(m_pCairo, notif->color.r, notif->color.g, notif->color.b, notif->color.a);
         cairo_rectangle(m_pCairo, MONSIZE.x - (NOTIFSIZE.x + NOTIF_LEFTBAR_SIZE) * FIRSTRECTPERC, offsetY, (NOTIFSIZE.x + NOTIF_LEFTBAR_SIZE) * FIRSTRECTPERC, NOTIFSIZE.y);
         cairo_fill(m_pCairo);
 
         cairo_set_source_rgb(m_pCairo, 0.f, 0.f, 0.f);
-
         cairo_rectangle(m_pCairo, MONSIZE.x - NOTIFSIZE.x * SECONDRECTPERC, offsetY, NOTIFSIZE.x * SECONDRECTPERC, NOTIFSIZE.y);
         cairo_fill(m_pCairo);
 
         cairo_set_source_rgba(m_pCairo, notif->color.r, notif->color.g, notif->color.b, notif->color.a);
-
         cairo_rectangle(m_pCairo, MONSIZE.x - NOTIFSIZE.x * SECONDRECTPERC + 3, offsetY + NOTIFSIZE.y - 4, THIRDRECTPERC * (NOTIFSIZE.x - 6), 2);
         cairo_fill(m_pCairo);
 
@@ -164,26 +158,27 @@ CBox CHyprNotificationOverlay::drawNotifications(CMonitor* pMonitor) {
 
             // draw icon
             cairo_set_source_rgb(m_pCairo, 1.f, 1.f, 1.f);
-            cairo_move_to(m_pCairo, MONSIZE.x - NOTIFSIZE.x * SECONDRECTPERC + NOTIF_LEFTBAR_SIZE + ICONPADFORNOTIF - 1, offsetY + std::round((NOTIFSIZE.y - iconH - 4) / 2.0));
-            pango_cairo_show_layout(m_pCairo, pangoLayout);
+            cairo_move_to(m_pCairo, MONSIZE.x - NOTIFSIZE.x * SECONDRECTPERC + NOTIF_LEFTBAR_SIZE + ICONPADFORNOTIF - 1, offsetY - 2 + std::round((NOTIFSIZE.y - iconH) / 2.0));
+            pango_layout_set_text(layout, ICON.c_str(), -1);
+            pango_cairo_show_layout(m_pCairo, layout);
         }
 
         // draw text
-        cairo_set_font_size(m_pCairo, FONTSIZE);
         cairo_set_source_rgb(m_pCairo, 1.f, 1.f, 1.f);
-        cairo_move_to(m_pCairo, MONSIZE.x - NOTIFSIZE.x * SECONDRECTPERC + NOTIF_LEFTBAR_SIZE + iconW + 2 * ICONPADFORNOTIF, offsetY + FONTSIZE + (FONTSIZE / 10.0));
-        cairo_show_text(m_pCairo, notif->text.c_str());
+        cairo_move_to(m_pCairo, MONSIZE.x - NOTIFSIZE.x * SECONDRECTPERC + NOTIF_LEFTBAR_SIZE + iconW + 2 * ICONPADFORNOTIF, offsetY - 2 + std::round((NOTIFSIZE.y - textH) / 2.0));
+        pango_layout_set_text(layout, notif->text.c_str(), -1);
+        pango_cairo_show_layout(m_pCairo, layout);
 
         // adjust offset and move on
         offsetY += NOTIFSIZE.y + 10;
 
         if (maxWidth < NOTIFSIZE.x)
             maxWidth = NOTIFSIZE.x;
-
-        pango_font_description_free(pangoFD);
-        g_object_unref(pangoLayout);
     }
 
+    pango_font_description_free(pangoFD);
+    g_object_unref(layout);
+
     // cleanup notifs
     std::erase_if(m_dNotifications, [](const auto& notif) { return notif->started.getMillis() > notif->timeMs; });