xfree86: store the InputAttributes in the input device.

InputAttributes largely decide which configuration values get merged from
the xorg.conf.d snippets. While they are available in the config backend,
they are not available for any other callers of NewInputDeviceRequest().

Drivers implementing driver-side hotplugging do not have access to these
attributes and cannot have xorg.conf.d snippets specific to dependent
devices. For example, the following case cannot work right now:

Section "InputClass"
        MatchProduct "Wacom"
        Option "PressCurve" "0 0 100 100"
        ...
EndSection

Section "InputClass"
        MatchProduct "Wacom"
        MatchProduct "eraser"
        Option "PressCurve" "10 10 50 50"
        ...
EndSection

The second section is not triggered, as the wacom driver cannot supply the
InputAttributes to NewInputDeviceRequest().

Add the attributes to the IDevRec and merge them into the InputInfoRec to
make them accessible in the driver. This changes the ABI for input drivers.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

hw/xfree86/common/xf86Helper.c

@@ -330,6 +330,8 @@ xf86DeleteInput(InputInfoPtr pInp, int flags)
     if (pInp->private)
 	free(pInp->private);
 
+    FreeInputAttributes(pInp->attrs);
+
     /* Remove the entry from the list. */
     if (pInp == xf86InputDevs)
 	xf86InputDevs = pInp->next;

hw/xfree86/common/xf86Option.c

@@ -164,6 +164,10 @@ xf86CollectInputOptions(InputInfoPtr pInfo, const char **defaultOpts,
 	else
 	    pInfo->options = tmp;
     }
+
+    if (pInfo->conf_idev && pInfo->conf_idev->attrs) {
+        pInfo->attrs = pInfo->conf_idev->attrs;
+    }
 }
 
 /* Created for new XInput stuff -- essentially extensions to the parser	*/

hw/xfree86/common/xf86Xinput.c

@@ -622,7 +622,6 @@ MergeInputClasses(IDevPtr idev, InputAttributes *attrs)
         mergedopts = xf86ReplaceStrOption(mergedopts, "driver", idev->driver);
     }
     idev->commonOptions = xf86optionListMerge(idev->commonOptions, mergedopts);
-
     return Success;
 }
 
@@ -822,6 +821,8 @@ NewInputDeviceRequest (InputOption *options, InputAttributes *attrs,
         rval = MergeInputClasses(idev, attrs);
         if (rval != Success)
             goto unwind;
+
+        idev->attrs = DuplicateInputAttributes(attrs);
     }
 
     if (!idev->driver || !idev->identifier) {

hw/xfree86/common/xf86Xinput.h

@@ -148,6 +148,7 @@ typedef struct _LocalDeviceRec {
     pointer		    module;
     pointer		    options;
     unsigned int            history_size;
+    InputAttributes         *attrs;
 } LocalDeviceRec, *LocalDevicePtr, InputInfoRec, *InputInfoPtr;
 
 typedef struct _DeviceAssocRec 

hw/xfree86/common/xf86str.h

@@ -406,6 +406,7 @@ typedef struct {
    char *			driver;
    pointer		 	commonOptions;
    pointer			extraOptions;
+   InputAttributes              *attrs;
 } IDevRec, *IDevPtr;
 
 typedef struct {