Merge(#1): Add Cocoa Dock icon progress bar implemenetation

CONTRIBUTORS.md

@@ -98,6 +98,7 @@ video tutorials.
  - IntellectualKitty
  - Aaron Jacobs
  - JannikGM
+ - Andreas O. Jansen
  - Erik S. V. Jansson
  - jjYBdx4IL
  - Toni Jovanoski

docs/window.dox

@@ -1161,7 +1161,7 @@ attention, the system will automatically end the request.
 
 @subsection window_taskbar_progress Window taskbar progress
 
-If you whish to display the progress of some action on the taskbar, you can
+If you wish to display the progress of some action on the taskbar, you can
 do this with @ref glfwSetWindowTaskbarProgress.
 
 @code

include/GLFW/glfw3.h

@@ -1289,6 +1289,8 @@ extern "C" {
  *
  *  @remark @x11 @wayland This behaves like @ref GLFW_TASKBAR_PROGRESS_NORMAL.
  *
+ *  @remark @macos This displays a standard indeterminate `NSProgressIndicator`.
+ *
  *  Used by @ref window_taskbar_progress.
  */
 #define GLFW_TASKBAR_PROGRESS_INDETERMINATE 1
@@ -1305,7 +1307,7 @@ extern "C" {
  *
  *  @remark @win32 This displays a red progress bar with 100% progress.
  *
- *  @remark @x11 @wayland This behaves like @ref GLFW_TASKBAR_PROGRESS_NORMAL.
+ *  @remark @x11 @wayland @macos This behaves like @ref GLFW_TASKBAR_PROGRESS_NORMAL.
  *
  *  Used by @ref window_taskbar_progress.
  */
@@ -1316,7 +1318,7 @@ extern "C" {
  *
  *  @remark @win32 This displays a yellow filled progress bar.
  *
- *  @remark @x11 @wayland This behaves like @ref GLFW_TASKBAR_PROGRESS_NORMAL.
+ *  @remark @x11 @wayland @macos This behaves like @ref GLFW_TASKBAR_PROGRESS_NORMAL.
  *
  *  Used by @ref window_taskbar_progress.
  */
@@ -3374,7 +3376,8 @@ GLFWAPI void glfwSetWindowIcon(GLFWwindow* window, int count, const GLFWimage* i
  *
  *  @remark @win32 On Windows Vista and earlier, this function will emit @ref GLFW_FEATURE_UNAVAILABLE.
  *
- *  @remark @macos This function will emit @ref GLFW_FEATURE_UNIMPLEMENTED.
+ *  @remark @macos There exists only one Dock icon progress bar, and this
+ *  displays the combined values of all the windows.
  *
  *  @remark @x11 @wayland Requires a valid application desktop file with the same name
  *  as the compiled executable. Due to limitations in the Unity Launcher API
@@ -3391,7 +3394,7 @@ GLFWAPI void glfwSetWindowIcon(GLFWwindow* window, int count, const GLFWimage* i
  *
  *  @ingroup window
  */
-GLFWAPI void glfwSetWindowTaskbarProgress(GLFWwindow* window, const int progressState, double value);
+GLFWAPI void glfwSetWindowTaskbarProgress(GLFWwindow* window, int progressState, double value);
 
 /*! @brief Retrieves the position of the content area of the specified window.
  *

src/cocoa_init.m

@@ -650,6 +650,12 @@ void _glfwTerminateCocoa(void)
 {
     @autoreleasepool {
         
+    if (_glfw.ns.dockProgressIndicator.view != nil)
+    {
+        [_glfw.ns.dockProgressIndicator.view removeFromSuperview];
+        [_glfw.ns.dockProgressIndicator.view release];
+    }
+
     if (_glfw.ns.inputSource)
     {
         CFRelease(_glfw.ns.inputSource);

src/cocoa_platform.h

@@ -156,6 +156,11 @@ typedef struct _GLFWwindowNS
     // since the last cursor motion event was processed
     // This is kept to counteract Cocoa doing the same internally
     double          cursorWarpDeltaX, cursorWarpDeltaY;
+    
+    struct {
+        int state;
+        double value;
+    } dockProgressIndicator;
 } _GLFWwindowNS;
 
 // Cocoa-specific global data
@@ -189,6 +194,13 @@ typedef struct _GLFWlibraryNS
         PFN_LMGetKbdType GetKbdType;
         CFStringRef     kPropertyUnicodeKeyLayoutData;
     } tis;
+    
+    struct {
+        id view;
+        int windowCount;
+        int indeterminateCount;
+        double totalValue;
+    } dockProgressIndicator;
 } _GLFWlibraryNS;
 
 // Cocoa-specific per-monitor data
@@ -218,7 +230,7 @@ GLFWbool _glfwCreateWindowCocoa(_GLFWwindow* window, const _GLFWwndconfig* wndco
 void _glfwDestroyWindowCocoa(_GLFWwindow* window);
 void _glfwSetWindowTitleCocoa(_GLFWwindow* window, const char* title);
 void _glfwSetWindowIconCocoa(_GLFWwindow* window, int count, const GLFWimage* images);
-void _glfwSetWindowTaskbarProgressCocoa(_GLFWwindow* window, const int taskbarState, double value);
+void _glfwSetWindowTaskbarProgressCocoa(_GLFWwindow* window, int progressState, double value);
 void _glfwGetWindowPosCocoa(_GLFWwindow* window, int* xpos, int* ypos);
 void _glfwSetWindowPosCocoa(_GLFWwindow* window, int xpos, int ypos);
 void _glfwGetWindowSizeCocoa(_GLFWwindow* window, int* width, int* height);

src/cocoa_window.m

@@ -197,6 +197,83 @@ static NSUInteger translateKeyToModifierFlag(int key)
 //
 static const NSRange kEmptyRange = { NSNotFound, 0 };
 
+static NSProgressIndicator* createProgressIndicator(const NSDockTile* dockTile)
+{
+    NSView* contentView = [dockTile contentView];
+
+    NSProgressIndicator* indicator = [[NSProgressIndicator alloc] initWithFrame:NSMakeRect(0.0f, 0.0f, contentView.frame.size.width, 15.0f)];
+    
+    [indicator setStyle:NSProgressIndicatorStyleBar];
+    
+    if (@available(macOS 11.0, *))
+    {
+        [indicator setControlSize:NSControlSizeLarge];
+    }
+    
+    [indicator setMinValue:0.0f];
+    [indicator setMaxValue:1.0f];
+    
+    [indicator sizeToFit];
+
+    [contentView addSubview:indicator];
+
+    _glfw.ns.dockProgressIndicator.view = indicator;
+    
+    return indicator;
+}
+
+static void setDockProgressIndicator(int progressState, double value)
+{
+    NSProgressIndicator* indicator = _glfw.ns.dockProgressIndicator.view;
+    
+    NSDockTile* dockTile = [[NSApplication sharedApplication] dockTile];
+    
+    if (indicator == nil)
+    {
+        if ([dockTile contentView] == nil)
+        {
+            NSImageView *iconView = [[NSImageView alloc] init];
+            [iconView setImage:[[NSApplication sharedApplication] applicationIconImage]];
+            [dockTile setContentView:iconView];
+            [iconView release];
+        }
+    
+        indicator = createProgressIndicator(dockTile);
+    }
+    
+    // ### Switching from INDETERMINATE to NORMAL, PAUSED or ERROR requires 2 invocations in different frames.
+    // In MacOS 12 (and probably other versions), an indeterminate progress bar is rendered as a normal bar
+    // with 0.0 progress. So when calling [progressIndicator setIndeterminate:YES], the indicator actually
+    // sets its doubleValue to 0.0.
+    // The bug is caused by NSProgressIndicator not immediately updating its value when it's increasing.
+    // This code illustrates the exact same problem, but this time from NORMAL, PAUSED and ERROR to INDETERMINATE:
+    //
+    // if (progressState == GLFW_TASKBAR_PROGRESS_INDETERMINATE)
+    //     [progressIndicator setDoubleValue:0.75];
+    // else
+    //     [progressIndicator setDoubleValue:0.25];
+    //
+    // This is likely a bug in Cocoa.
+    //
+    // ### Progress increments are delayed
+    // What this also means, is that each time the progress increments, the bar's progress will be 1 frame delayed,
+    // and only updated once a higher or similar value is again set the next frame.
+    
+    // Workaround for the aforementioned issues. If there's any versions of MacOS where
+    // this issue is not present, this should be ommitted in those versions.
+    if ([indicator isIndeterminate] || [indicator doubleValue] < value)
+    {
+        [indicator removeFromSuperview];
+        [indicator release];
+        indicator = createProgressIndicator(dockTile);
+    }
+    
+    [indicator setIndeterminate:progressState == GLFW_TASKBAR_PROGRESS_INDETERMINATE];
+    [indicator setHidden:progressState == GLFW_TASKBAR_PROGRESS_DISABLED];
+    [indicator setDoubleValue:value];
+    
+    [dockTile display];
+}
 
 //------------------------------------------------------------------------
 // Delegate for window related notifications
@@ -987,6 +1064,8 @@ void _glfwDestroyWindowCocoa(_GLFWwindow* window)
 {
     @autoreleasepool {
         
+    _glfwSetWindowTaskbarProgressCocoa(window, GLFW_TASKBAR_PROGRESS_DISABLED, 0.0);
+
     if (_glfw.ns.disabledCursorWindow == window)
         _glfw.ns.disabledCursorWindow = NULL;
 
@@ -1032,10 +1111,60 @@ void _glfwSetWindowIconCocoa(_GLFWwindow* window,
                     "Cocoa: Regular windows do not have icons on macOS");
 }
 
-void _glfwSetWindowTaskbarProgressCocoa(_GLFWwindow* window, const int progressState, double value)
+void _glfwSetWindowTaskbarProgressCocoa(_GLFWwindow* window, int progressState, double value)
 {
-    _glfwInputError(GLFW_FEATURE_UNIMPLEMENTED,
+    if (progressState == GLFW_TASKBAR_PROGRESS_ERROR || progressState == GLFW_TASKBAR_PROGRESS_PAUSED)
-                    "Cocoa: Window taskbar progress is not implemented");
+        progressState = GLFW_TASKBAR_PROGRESS_NORMAL;
+        
+    const int oldState = window->ns.dockProgressIndicator.state;
+    const int state = progressState;
+    
+    const double oldValue = window->ns.dockProgressIndicator.value;
+    
+    if (oldState == state)
+    {
+        if (state == GLFW_TASKBAR_PROGRESS_DISABLED ||
+            state == GLFW_TASKBAR_PROGRESS_INDETERMINATE ||
+            oldValue == value)
+            return;
+    }
+    
+    if (oldState != state)
+    {
+        // Reset
+        if (oldState == GLFW_TASKBAR_PROGRESS_INDETERMINATE)
+            --_glfw.ns.dockProgressIndicator.indeterminateCount;
+        if (oldState != GLFW_TASKBAR_PROGRESS_DISABLED)
+        {
+            --_glfw.ns.dockProgressIndicator.windowCount;
+            _glfw.ns.dockProgressIndicator.totalValue -= oldValue;
+        }
+        
+        // Set
+        if (state == GLFW_TASKBAR_PROGRESS_INDETERMINATE)
+            ++_glfw.ns.dockProgressIndicator.indeterminateCount;
+        if (state != GLFW_TASKBAR_PROGRESS_DISABLED)
+        {
+            ++_glfw.ns.dockProgressIndicator.windowCount;
+            _glfw.ns.dockProgressIndicator.totalValue += value;
+        }
+    }
+    else if (state != GLFW_TASKBAR_PROGRESS_DISABLED)
+        _glfw.ns.dockProgressIndicator.totalValue += (value - oldValue);
+    
+    
+    if (_glfw.ns.dockProgressIndicator.windowCount > _glfw.ns.dockProgressIndicator.indeterminateCount)
+    {
+        const double finalValue = _glfw.ns.dockProgressIndicator.totalValue / _glfw.ns.dockProgressIndicator.windowCount;
+        setDockProgressIndicator(GLFW_TASKBAR_PROGRESS_NORMAL, finalValue);
+    }
+    else if (_glfw.ns.dockProgressIndicator.indeterminateCount > 0)
+        setDockProgressIndicator(GLFW_TASKBAR_PROGRESS_INDETERMINATE, 0.0f);
+    else
+        setDockProgressIndicator(GLFW_TASKBAR_PROGRESS_DISABLED, 0.0f);
+    
+    window->ns.dockProgressIndicator.state = state;
+    window->ns.dockProgressIndicator.value = value;
 }
 
 void _glfwGetWindowPosCocoa(_GLFWwindow* window, int* xpos, int* ypos)

src/null_platform.h

@@ -89,7 +89,7 @@ GLFWbool _glfwCreateWindowNull(_GLFWwindow* window, const _GLFWwndconfig* wndcon
 void _glfwDestroyWindowNull(_GLFWwindow* window);
 void _glfwSetWindowTitleNull(_GLFWwindow* window, const char* title);
 void _glfwSetWindowIconNull(_GLFWwindow* window, int count, const GLFWimage* images);
-void _glfwSetWindowTaskbarProgressNull(_GLFWwindow* window, const int taskbarState, double value);
+void _glfwSetWindowTaskbarProgressNull(_GLFWwindow* window, int progressState, double value);
 void _glfwSetWindowMonitorNull(_GLFWwindow* window, _GLFWmonitor* monitor, int xpos, int ypos, int width, int height, int refreshRate);
 void _glfwGetWindowPosNull(_GLFWwindow* window, int* xpos, int* ypos);
 void _glfwSetWindowPosNull(_GLFWwindow* window, int xpos, int ypos);

src/null_window.c

@@ -187,7 +187,7 @@ void _glfwSetWindowIconNull(_GLFWwindow* window, int count, const GLFWimage* ima
 {
 }
 
-void _glfwSetWindowTaskbarProgressNull(_GLFWwindow* window, const int progressState, double value)
+void _glfwSetWindowTaskbarProgressNull(_GLFWwindow* window, int progressState, double value)
 {
 }
 

src/win32_platform.h

@@ -618,7 +618,7 @@ GLFWbool _glfwCreateWindowWin32(_GLFWwindow* window, const _GLFWwndconfig* wndco
 void _glfwDestroyWindowWin32(_GLFWwindow* window);
 void _glfwSetWindowTitleWin32(_GLFWwindow* window, const char* title);
 void _glfwSetWindowIconWin32(_GLFWwindow* window, int count, const GLFWimage* images);
-void _glfwSetWindowTaskbarProgressWin32(_GLFWwindow* window, const int taskbarState, double value);
+void _glfwSetWindowTaskbarProgressWin32(_GLFWwindow* window, int progressState, double value);
 void _glfwGetWindowPosWin32(_GLFWwindow* window, int* xpos, int* ypos);
 void _glfwSetWindowPosWin32(_GLFWwindow* window, int xpos, int ypos);
 void _glfwGetWindowSizeWin32(_GLFWwindow* window, int* width, int* height);

src/win32_window.c

@@ -1596,7 +1596,7 @@ void _glfwSetWindowIconWin32(_GLFWwindow* window, int count, const GLFWimage* im
     }
 }
 
-void _glfwSetWindowTaskbarProgressWin32(_GLFWwindow* window, const int progressState, double value)
+void _glfwSetWindowTaskbarProgressWin32(_GLFWwindow* window, int progressState, double value)
 {
     HRESULT res = S_OK;
     int winProgressState = 0;

src/window.c

@@ -558,7 +558,7 @@ GLFWAPI void glfwSetWindowIcon(GLFWwindow* handle,
     _glfw.platform.setWindowIcon(window, count, images);
 }
 
-GLFWAPI void glfwSetWindowTaskbarProgress(GLFWwindow* handle, const int progressState, double value)
+GLFWAPI void glfwSetWindowTaskbarProgress(GLFWwindow* handle, int progressState, double value)
 {
     _GLFWwindow* window = (_GLFWwindow*) handle;
 

src/wl_platform.h

@@ -446,7 +446,7 @@ GLFWbool _glfwCreateWindowWayland(_GLFWwindow* window, const _GLFWwndconfig* wnd
 void _glfwDestroyWindowWayland(_GLFWwindow* window);
 void _glfwSetWindowTitleWayland(_GLFWwindow* window, const char* title);
 void _glfwSetWindowIconWayland(_GLFWwindow* window, int count, const GLFWimage* images);
-void _glfwSetWindowTaskbarProgressWayland(_GLFWwindow* window, const int taskbarState, double value);
+void _glfwSetWindowTaskbarProgressWayland(_GLFWwindow* window, int progressState, double value);
 void _glfwGetWindowPosWayland(_GLFWwindow* window, int* xpos, int* ypos);
 void _glfwSetWindowPosWayland(_GLFWwindow* window, int xpos, int ypos);
 void _glfwGetWindowSizeWayland(_GLFWwindow* window, int* width, int* height);

src/wl_window.c

@@ -1902,11 +1902,11 @@ void _glfwSetWindowIconWayland(_GLFWwindow* window,
                     "Wayland: The platform does not support setting the window icon");
 }
 
-void _glfwSetWindowTaskbarProgressWayland(_GLFWwindow* window, const int taskbarState, double value)
+void _glfwSetWindowTaskbarProgressWayland(_GLFWwindow* window, const int progressState, double value)
 {
     (void)window;
 
-    const dbus_bool_t progressVisible = (taskbarState != GLFW_TASKBAR_PROGRESS_DISABLED);
+    const dbus_bool_t progressVisible = (progressState != GLFW_TASKBAR_PROGRESS_DISABLED);
 
     _glfwUpdateTaskbarProgressDBusPOSIX(progressVisible, value);
 }

src/x11_platform.h

@@ -905,7 +905,7 @@ GLFWbool _glfwCreateWindowX11(_GLFWwindow* window, const _GLFWwndconfig* wndconf
 void _glfwDestroyWindowX11(_GLFWwindow* window);
 void _glfwSetWindowTitleX11(_GLFWwindow* window, const char* title);
 void _glfwSetWindowIconX11(_GLFWwindow* window, int count, const GLFWimage* images);
-void _glfwSetWindowTaskbarProgressX11(_GLFWwindow* window, const int taskbarState, double value);
+void _glfwSetWindowTaskbarProgressX11(_GLFWwindow* window, int progressState, double value);
 void _glfwGetWindowPosX11(_GLFWwindow* window, int* xpos, int* ypos);
 void _glfwSetWindowPosX11(_GLFWwindow* window, int xpos, int ypos);
 void _glfwGetWindowSizeX11(_GLFWwindow* window, int* width, int* height);

src/x11_window.c

@@ -2152,11 +2152,11 @@ void _glfwSetWindowIconX11(_GLFWwindow* window, int count, const GLFWimage* imag
     XFlush(_glfw.x11.display);
 }
 
-void _glfwSetWindowTaskbarProgressX11(_GLFWwindow* window, const int taskbarState, double value)
+void _glfwSetWindowTaskbarProgressX11(_GLFWwindow* window, int progressState, double value)
 {
     (void)window;
 
-    const dbus_bool_t progressVisible = (taskbarState != GLFW_TASKBAR_PROGRESS_DISABLED);
+    const dbus_bool_t progressVisible = (progressState != GLFW_TASKBAR_PROGRESS_DISABLED);
 
     _glfwUpdateTaskbarProgressDBusPOSIX(progressVisible, value);
 }

tests/window.c

@@ -418,20 +418,22 @@ int main(int argc, char** argv)
 
             nk_layout_row_dynamic(nk, 30, 5);
 
+            static int state = GLFW_TASKBAR_PROGRESS_DISABLED;
             static float progress = 0;
             if(nk_button_label(nk, "No progress"))
-                glfwSetWindowTaskbarProgress(window, GLFW_TASKBAR_PROGRESS_DISABLED, (double)progress);
+                glfwSetWindowTaskbarProgress(window, state = GLFW_TASKBAR_PROGRESS_DISABLED, (double) progress);
             if (nk_button_label(nk, "Indeterminate"))
-                glfwSetWindowTaskbarProgress(window, GLFW_TASKBAR_PROGRESS_INDETERMINATE, (double)progress);
+                glfwSetWindowTaskbarProgress(window, state = GLFW_TASKBAR_PROGRESS_INDETERMINATE, (double) progress);
             if (nk_button_label(nk, "Normal"))
-                glfwSetWindowTaskbarProgress(window, GLFW_TASKBAR_PROGRESS_NORMAL, (double)progress);
+                glfwSetWindowTaskbarProgress(window, state = GLFW_TASKBAR_PROGRESS_NORMAL, (double) progress);
             if (nk_button_label(nk, "Error"))
-                glfwSetWindowTaskbarProgress(window, GLFW_TASKBAR_PROGRESS_ERROR, (double)progress);
+                glfwSetWindowTaskbarProgress(window, state = GLFW_TASKBAR_PROGRESS_ERROR, (double) progress);
             if (nk_button_label(nk, "Paused"))
-                glfwSetWindowTaskbarProgress(window, GLFW_TASKBAR_PROGRESS_PAUSED, (double)progress);
+                glfwSetWindowTaskbarProgress(window, state = GLFW_TASKBAR_PROGRESS_PAUSED, (double) progress);
 
             nk_label(nk, "Progress: ", NK_TEXT_ALIGN_LEFT);
-            nk_slider_float(nk, 0.0f, &progress, 1.0f, 0.05f);
+            if (nk_slider_float(nk, 0.0f, &progress, 1.0f, 0.05f))
+                glfwSetWindowTaskbarProgress(window, state, (double) progress);
         }
         nk_end(nk);