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Added option to maintain indentation when wrapping lines.

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Currently only exposed in code, not in UI.  Enabled by default.
This commit is contained in:
Nathan Vegdahl 2015-03-08 12:18:22 -07:00
parent ed510cffbc
commit e1e06633c7
2 changed files with 74 additions and 17 deletions
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32
src/string_utils.rs
View File

@ -19,6 +19,38 @@ pub fn is_line_ending(text: &str) -> bool {
}
}
pub fn is_whitespace(text: &str) -> bool {
// TODO: this is a naive categorization of whitespace characters.
// For better categorization these should be split up into groups
// based on e.g. breaking vs non-breaking spaces, among other things.
match text {
"\u{0020}" // SPACE
| "\u{0009}" // CHARACTER TABULATION
| "\u{00A0}" // NO-BREAK SPACE
//| "\u{1680}" // OGHAM SPACE MARK (here for completeness, but usually displayed as a dash, not as whitespace)
| "\u{180E}" // MONGOLIAN VOWEL SEPARATOR
| "\u{2000}" // EN QUAD
| "\u{2001}" // EM QUAD
| "\u{2002}" // EN SPACE
| "\u{2003}" // EM SPACE
| "\u{2004}" // THREE-PER-EM SPACE
| "\u{2005}" // FOUR-PER-EM SPACE
| "\u{2006}" // SIX-PER-EM SPACE
| "\u{2007}" // FIGURE SPACE
| "\u{2008}" // PUNCTUATION SPACE
| "\u{2009}" // THIN SPACE
| "\u{200A}" // HAIR SPACE
| "\u{200B}" // ZERO WIDTH SPACE
| "\u{202F}" // NARROW NO-BREAK SPACE
| "\u{205F}" // MEDIUM MATHEMATICAL SPACE
| "\u{3000}" // IDEOGRAPHIC SPACE
| "\u{FEFF}" // ZERO WIDTH NO-BREAK SPACE
=> true,
_ => false
}
}
pub fn line_ending_count(text: &str) -> usize {
let mut count = 0;
for g in text.graphemes(true) {

53
src/term_ui/formatter.rs
View File

@ -1,6 +1,6 @@
use std::cmp::max;
use string_utils::{is_line_ending};
use string_utils::{is_line_ending, is_whitespace};
use formatter::{LineFormatter, RoundingBehavior};
pub enum WrapType {
@ -25,7 +25,7 @@ impl ConsoleLineFormatter {
ConsoleLineFormatter {
tab_width: tab_width,
wrap_type: WrapType::CharWrap(40),
maintain_indent: false,
maintain_indent: true,
}
}
@ -51,6 +51,8 @@ impl ConsoleLineFormatter {
grapheme_iter: g_iter,
f: self,
pos: (0, 0),
indent: 0,
indent_found: false,
}
}
}
@ -131,6 +133,8 @@ where T: Iterator<Item=&'a str>
grapheme_iter: T,
f: &'a ConsoleLineFormatter,
pos: (usize, usize),
indent: usize,
indent_found: bool,
}
@ -160,11 +164,32 @@ where T: Iterator<Item=&'a str>
let width = grapheme_vis_width_at_vis_pos(g, self.pos.1, self.f.tab_width as usize);
if (self.pos.1 + width) > wrap_width {
if !self.indent_found {
self.indent = 0;
self.indent_found = true;
}
if self.f.maintain_indent {
let pos = (self.pos.0 + self.f.single_line_height(), self.indent);
self.pos = (self.pos.0 + self.f.single_line_height(), self.indent + width);
return Some((g, pos, width));
}
else {
let pos = (self.pos.0 + self.f.single_line_height(), 0);
self.pos = (self.pos.0 + self.f.single_line_height(), width);
return Some((g, pos, width));
}
}
else {
if !self.indent_found {
if is_whitespace(g) {
self.indent += width;
}
else {
self.indent_found = true;
}
}
let pos = self.pos;
self.pos = (self.pos.0, self.pos.1 + width);
return Some((g, pos, width));
@ -225,7 +250,7 @@ mod tests {
fn dimensions_1() {
let text = "Hello there, stranger!"; // 22 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 80;
f.set_wrap_width(80);
assert_eq!(f.dimensions(text.graphemes(true)), (1, 22));
}
@ -235,7 +260,7 @@ mod tests {
fn dimensions_2() {
let text = "Hello there, stranger! How are you doing this fine day?"; // 56 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 12;
f.set_wrap_width(12);
assert_eq!(f.dimensions(text.graphemes(true)), (5, 12));
}
@ -245,7 +270,7 @@ mod tests {
fn index_to_v2d_1() {
let text = "Hello there, stranger!"; // 22 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 80;
f.set_wrap_width(80);
assert_eq!(f.index_to_v2d(text.graphemes(true), 0), (0, 0));
assert_eq!(f.index_to_v2d(text.graphemes(true), 5), (0, 5));
@ -258,7 +283,7 @@ mod tests {
fn index_to_v2d_2() {
let text = "Hello there, stranger! How are you doing this fine day?"; // 56 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 12;
f.set_wrap_width(12);
assert_eq!(f.index_to_v2d(text.graphemes(true), 0), (0, 0));
assert_eq!(f.index_to_v2d(text.graphemes(true), 5), (0, 5));
@ -288,7 +313,7 @@ mod tests {
fn v2d_to_index_1() {
let text = "Hello there, stranger!"; // 22 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 80;
f.set_wrap_width(80);
assert_eq!(f.v2d_to_index(text.graphemes(true), (0,0), (Floor, Floor)), 0);
assert_eq!(f.v2d_to_index(text.graphemes(true), (0,5), (Floor, Floor)), 5);
@ -303,7 +328,7 @@ mod tests {
fn v2d_to_index_2() {
let text = "Hello there, stranger! How are you doing this fine day?"; // 56 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 12;
f.set_wrap_width(12);
assert_eq!(f.v2d_to_index(text.graphemes(true), (0,0), (Floor, Floor)), 0);
assert_eq!(f.v2d_to_index(text.graphemes(true), (0,11), (Floor, Floor)), 11);
@ -332,7 +357,7 @@ mod tests {
fn index_to_horizontal_v2d_1() {
let b = Buffer::new_from_str("Hello there, stranger!\nHow are you doing this fine day?"); // 55 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 80;
f.set_wrap_width(80);
assert_eq!(f.index_to_horizontal_v2d(&b, 0), 0);
assert_eq!(f.index_to_horizontal_v2d(&b, 5), 5);
@ -346,7 +371,7 @@ mod tests {
fn index_to_horizontal_v2d_2() {
let b = Buffer::new_from_str("Hello there, stranger!\nHow are you doing this fine day?"); // 55 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 12;
f.set_wrap_width(12);
assert_eq!(f.index_to_horizontal_v2d(&b, 0), 0);
assert_eq!(f.index_to_horizontal_v2d(&b, 11), 11);
@ -370,7 +395,7 @@ mod tests {
fn index_set_horizontal_v2d_1() {
let b = Buffer::new_from_str("Hello there, stranger!\nHow are you doing this fine day?"); // 55 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 80;
f.set_wrap_width(80);
assert_eq!(f.index_set_horizontal_v2d(&b, 0, 0, Floor), 0);
assert_eq!(f.index_set_horizontal_v2d(&b, 0, 22, Floor), 22);
@ -402,7 +427,7 @@ mod tests {
fn index_set_horizontal_v2d_2() {
let b = Buffer::new_from_str("Hello there, stranger! How are you doing this fine day?"); // 55 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 12;
f.set_wrap_width(12);
assert_eq!(f.index_set_horizontal_v2d(&b, 0, 0, Floor), 0);
assert_eq!(f.index_set_horizontal_v2d(&b, 0, 11, Floor), 11);
@ -434,7 +459,7 @@ mod tests {
fn index_offset_vertical_v2d_1() {
let b = Buffer::new_from_str("Hello there, stranger!\nHow are you doing this fine day?"); // 55 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 80;
f.set_wrap_width(80);
assert_eq!(f.index_offset_vertical_v2d(&b, 0, 0, (Floor, Floor)), 0);
assert_eq!(f.index_offset_vertical_v2d(&b, 0, 1, (Floor, Floor)), 23);
@ -458,7 +483,7 @@ mod tests {
fn index_offset_vertical_v2d_2() {
let b = Buffer::new_from_str("Hello there, stranger! How are you doing this fine day?"); // 55 graphemes long
let mut f = ConsoleLineFormatter::new(4);
f.wrap_width = 12;
f.set_wrap_width(12);
assert_eq!(f.index_offset_vertical_v2d(&b, 0, 0, (Floor, Floor)), 0);
assert_eq!(f.index_offset_vertical_v2d(&b, 0, 1, (Floor, Floor)), 12);