fixes #302 merge extended terminfo definitions into default

This makes the default build about 150k larger, but includes all
the good terminals needed to make most folks happy.  In addition,
it allows a build tag of tcell_minimal to suppress that.  Finally,
we do not include infocmp support on platforms unlikely to support
it, such as Windows, nacl, android, etc.

terms_default.go

@@ -0,0 +1,23 @@
+// +build !tcell_minimal
+
+// Copyright 2019 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	// This imports the default terminal entries.  To disable, use the
+	// tcell_minimal build tag.
+	_ "github.com/gdamore/tcell/terminfo/extended"
+)

terms_dynamic.go

@@ -0,0 +1,37 @@
+// +build !tcell_minimal,!nacl,!js,!zos,!plan9,!windows,!android
+
+// Copyright 2019 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	// This imports a dynamic version of the terminal database, which
+	// is built using infocmp.  This relies on a working installation
+	// of infocmp (typically supplied with ncurses).  We only do this
+	// for systems likely to have that -- i.e. UNIX based hosts.  We
+	// also don't support Android here, because you really don't want
+	// to run external programs there.  Generally the android terminals
+	// will be automatically included anyway.
+	"github.com/gdamore/tcell/terminfo"
+	"github.com/gdamore/tcell/terminfo/dynamic"
+)
+
+func loadDynamicTerminfo(term string) (*terminfo.Terminfo, error) {
+	ti, _, e := dynamic.LoadTerminfo(term)
+	if e != nil {
+		return nil, e
+	}
+	return ti, nil
+}

terms_static.go

@@ -0,0 +1,27 @@
+// +build tcell_minimal nacl js zos plan9 windows android
+
+// Copyright 2019 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"errors"
+
+	"github.com/gdamore/tcell/terminfo"
+)
+
+func loadDynamicTerminfo(term string) (*terminfo.Terminfo, error) {
+	return nil, errors.New("terminal type unsupported")
+}

tscreen.go

@@ -1,4 +1,4 @@
-// Copyright 2017 The TCell Authors
+// Copyright 2019 The TCell Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use file except in compliance with the License.
@@ -26,7 +26,6 @@ import (
 	"golang.org/x/text/transform"
 
 	"github.com/gdamore/tcell/terminfo"
-	"github.com/gdamore/tcell/terminfo/dynamic"
 
 	// import the stock terminals
 	_ "github.com/gdamore/tcell/terminfo/base"
@@ -43,7 +42,7 @@ import (
 func NewTerminfoScreen() (Screen, error) {
 	ti, e := terminfo.LookupTerminfo(os.Getenv("TERM"))
 	if e != nil {
-		ti, _, e = dynamic.LoadTerminfo(os.Getenv("TERM"))
+		ti, e = loadDynamicTerminfo(os.Getenv("TERM"))
 		if e != nil {
 			return nil, e
 		}