config: make various sections accessible via global vars

There is only one instance of AercConfig which is associated to the Aerc
widget. Everywhere we need to access configuration options, we need
somehow to get a reference either to the Aerc widget or to a pointer to
the AercConfig instance. This makes the code cluttered.

Remove the AercConfig structure and every place where it is referenced.
Instead, declare global variables for every configuration section and
access them directly from the `config` module.

Since bindings and ui sections can be "contextual" (i.e. per account,
per folder or per subject), leave most local references intact.
Replacing them with config.{Ui,Binds}.For{Account,Folder,Subject} would
make this patch even more unreadable. This is something that may be
addressed in the future.

Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Tim Culverhouse <tim@timculverhouse.com>

1 files changed, 9 insertions, 7 deletions

diff --git a/config/viewer.go b/config/viewer.go
index 3f7c6934..d5e32ac8 100644
--- a/config/viewer.go
+++ b/config/viewer.go
@@ -18,8 +18,8 @@ type ViewerConfig struct {
 	CloseOnReply   bool       `ini:"close-on-reply"`
 }
 
-func defaultViewerConfig() ViewerConfig {
-	return ViewerConfig{
+func defaultViewerConfig() *ViewerConfig {
+	return &ViewerConfig{
 		Pager:        "less -R",
 		Alternatives: []string{"text/plain", "text/html"},
 		ShowHeaders:  false,
@@ -34,23 +34,25 @@ func defaultViewerConfig() ViewerConfig {
 	}
 }
 
-func (config *AercConfig) parseViewer(file *ini.File) error {
+var Viewer = defaultViewerConfig()
+
+func parseViewer(file *ini.File) error {
 	viewer, err := file.GetSection("viewer")
 	if err != nil {
 		goto out
 	}
-	if err := viewer.MapTo(&config.Viewer); err != nil {
+	if err := viewer.MapTo(&Viewer); err != nil {
 		return err
 	}
 	for key, val := range viewer.KeysHash() {
 		switch key {
 		case "alternatives":
-			config.Viewer.Alternatives = strings.Split(val, ",")
+			Viewer.Alternatives = strings.Split(val, ",")
 		case "header-layout":
-			config.Viewer.HeaderLayout = parseLayout(val)
+			Viewer.HeaderLayout = parseLayout(val)
 		}
 	}
 out:
-	log.Debugf("aerc.conf: [viewer] %#v", config.Viewer)
+	log.Debugf("aerc.conf: [viewer] %#v", Viewer)
 	return nil
 }