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authorBas van Kervel <bas@ethdev.com>2016-06-08 18:17:38 +0800
committerBas van Kervel <bas@ethdev.com>2016-06-08 20:21:52 +0800
commitdbcdf83ed8aca3f0b84d67b944fff2f3a8bc7769 (patch)
tree7cb07d719fd687d419ac838cccc2ca01f0b14b5a /console
parentfdd61b83ffe1ac0e3ef0621acbd92dd61df9910d (diff)
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console: ignore round and curly brackets in strings when determining indentation level
Diffstat (limited to 'console')
-rw-r--r--console/console.go47
-rw-r--r--console/console_test.go46
2 files changed, 91 insertions, 2 deletions
diff --git a/console/console.go b/console/console.go
index baa9cf545..9cff8c876 100644
--- a/console/console.go
+++ b/console/console.go
@@ -330,11 +330,11 @@ func (c *Console) Interactive() {
// Append the line to the input and check for multi-line interpretation
input += line + "\n"
- indents = strings.Count(input, "{") + strings.Count(input, "(") - strings.Count(input, "}") - strings.Count(input, ")")
+ indents = countIndents(input)
if indents <= 0 {
prompt = c.prompt
} else {
- prompt = strings.Repeat("..", indents*2) + " "
+ prompt = strings.Repeat(".", indents*3) + " "
}
// If all the needed lines are present, save the command and run
if indents <= 0 {
@@ -353,6 +353,49 @@ func (c *Console) Interactive() {
}
}
+// countIndents returns the number of identations for the given input.
+// In case of invalid input such as var a = } the result can be negative.
+func countIndents(input string) int {
+ var (
+ indents = 0
+ inString = false
+ strOpenChar = ' ' // keep track of the string open char to allow var str = "I'm ....";
+ charEscaped = false // keep track if the previous char was the '\' char, allow var str = "abc\"def";
+ )
+
+ for _, c := range input {
+ switch c {
+ case '\\':
+ // indicate next char as escaped when in string and previous char isn't escaping this backslash
+ if !charEscaped && inString {
+ charEscaped = true
+ }
+ case '\'', '"':
+ if inString && !charEscaped && strOpenChar == c { // end string
+ inString = false
+ } else if !inString && !charEscaped { // begin string
+ inString = true
+ strOpenChar = c
+ }
+ charEscaped = false
+ case '{', '(':
+ if !inString { // ignore brackets when in string, allow var str = "a{"; without indenting
+ indents++
+ }
+ charEscaped = false
+ case '}', ')':
+ if !inString {
+ indents--
+ }
+ charEscaped = false
+ default:
+ charEscaped = false
+ }
+ }
+
+ return indents
+}
+
// Execute runs the JavaScript file specified as the argument.
func (c *Console) Execute(path string) error {
return c.jsre.Exec(path)
diff --git a/console/console_test.go b/console/console_test.go
index 911087824..7738d0c44 100644
--- a/console/console_test.go
+++ b/console/console_test.go
@@ -294,3 +294,49 @@ func TestPrettyError(t *testing.T) {
t.Fatalf("pretty error mismatch: have %s, want %s", output, want)
}
}
+
+// Tests that tests if the number of indents for JS input is calculated correct.
+func TestIndenting(t *testing.T) {
+ testCases := []struct {
+ input string
+ expectedIndentCount int
+ }{
+ {`var a = 1;`, 0},
+ {`"some string"`, 0},
+ {`"some string with (parentesis`, 0},
+ {`"some string with newline
+ ("`, 0},
+ {`function v(a,b) {}`, 0},
+ {`function f(a,b) { var str = "asd("; };`, 0},
+ {`function f(a) {`, 1},
+ {`function f(a, function(b) {`, 2},
+ {`function f(a, function(b) {
+ var str = "a)}";
+ });`, 0},
+ {`function f(a,b) {
+ var str = "a{b(" + a, ", " + b;
+ }`, 0},
+ {`var str = "\"{"`, 0},
+ {`var str = "'("`, 0},
+ {`var str = "\\{"`, 0},
+ {`var str = "\\\\{"`, 0},
+ {`var str = 'a"{`, 0},
+ {`var obj = {`, 1},
+ {`var obj = { {a:1`, 2},
+ {`var obj = { {a:1}`, 1},
+ {`var obj = { {a:1}, b:2}`, 0},
+ {`var obj = {}`, 0},
+ {`var obj = {
+ a: 1, b: 2
+ }`, 0},
+ {`var test = }`, -1},
+ {`var str = "a\""; var obj = {`, 1},
+ }
+
+ for i, tt := range testCases {
+ counted := countIndents(tt.input)
+ if counted != tt.expectedIndentCount {
+ t.Errorf("test %d: invalid indenting: have %d, want %d", i, counted, tt.expectedIndentCount)
+ }
+ }
+}