[−][src]Struct colonnade::Colonnade
A struct holding formatting information. This is the object which tabulates data.
Fields
columns: Vec<Column>
Methods
impl Colonnade
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pub fn new(columns: usize, width: usize) -> Result<Colonnade, ColonnadeError>
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Construct a Colonnade
with default values: left alignment, no column size
constraints, no blank lines between rows, 1 space margin between columns.
Arguments
columns
- The number of columns of data to expectwidth
- Viewport size in characters
Errors
ColonnadeError::InsufficientSpace
- the viewport isn't wide enough for the columns and their margins
Example
let colonnade = Colonnade::new(4, 100);
pub fn tabulate<T>(
&mut self,
table: &Vec<Vec<T>>
) -> Result<Vec<String>, ColonnadeError> where
T: ToString,
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&mut self,
table: &Vec<Vec<T>>
) -> Result<Vec<String>, ColonnadeError> where
T: ToString,
Converts the raw data in table
into a vector of strings representing the data in tabular form.
Blank lines will be zero-width rather than full-width lines of whitespace.
If you need finer control over the text, for instance, if you want to add color codes, see
macerate
.
Arguments
table
- The data to display.
Errors
Any errors of lay_out
. If the data has already been laid out, this method will throw no errors.
Example
let mut colonnade = Colonnade::new(4, 100)?; let data = vec![vec!["some", "words", "for", "example"]]; let lines = colonnade.tabulate(&data)?;
pub fn macerate<T>(
&mut self,
table: &Vec<Vec<T>>
) -> Result<Vec<Vec<(String, String)>>, ColonnadeError> where
T: ToString,
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&mut self,
table: &Vec<Vec<T>>
) -> Result<Vec<Vec<(String, String)>>, ColonnadeError> where
T: ToString,
Chew up the text into bits suitable for piecemeal layout.
More specifically, macerate
digests the raw data in table
into a vector of vectors of (String, String)
tuples
representing the data in tabular form. Each tuple consists of a whitespace left margin and
the contents of a column. Separator lines will consist of a margin and text tuple where the
text is zero-width and the "margin" is as wide as the table.
Maceration is useful if you wish to insert color codes to colorize the data or otherwise
manipulate the data post-layout. If you don't want to do this, see tabulate
.
Arguments
table
- The data to display.
Errors
Any errors of lay_out
. If the data has already been laid out, this method will throw no errors.
Example
extern crate term; // ... [some details omitted] // text to put in tabular form let text = vec![ vec![ "Colonnade lets you format text in columns.", "As you can see, it supports text alignment, viewport width, and column widths.", "It doesn't natively support color codes, but it is easy enough to combine with a crate like term.", ], vec!["", "Two or more rows of columns makes a table.", ""], ]; let mut colonnade = Colonnade::new(3, 80).unwrap(); // configure the table a bit colonnade.left_margin(4); colonnade.columns[0].left_margin(8); colonnade.fixed_width(15); colonnade.columns[1].clear_limits(); colonnade.columns[0].alignment(Alignment::Right); colonnade.columns[1].alignment(Alignment::Center); colonnade.spaces_between_rows(1); // if the text is in colored cells, you will probably want some padding colonnade.padding(1); // now print out the table let mut t = term::stdout().unwrap(); for line in colonnade.macerate(&text)? { for (i, (margin, text)) in line.iter().enumerate() { write!(t, "{}", margin); let background_color = if i % 2 == 0 { term::color::WHITE } else { term::color::BLACK }; let foreground_color = match i % 3 { 1 => term::color::GREEN, 2 => term::color::RED, _ => term::color::BLUE, }; t.bg(background_color)?; t.fg(foreground_color)?; write!(t, "{}", text)?; t.reset(); } println!(); }
pub fn lay_out<T>(&mut self, table: &Vec<Vec<T>>) -> Result<(), ColonnadeError> where
T: ToString,
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T: ToString,
Determine column widths given data.
Normally you do not need to call this method because it is called when you tabulate
the first batch of data. However, this initial layout will then be used for every subsequent batch
of data regardless of its size. If you want to re-flow the table to better fit the new data, you acn
call layout
.
Arguments
table
- The data to display.
Errors
ColonnadeError::InconsistentColumns
- The number of columns in some row oftable
does not match the spec.
Example
let mut colonnade = Colonnade::new(4, 100)?; let data = vec![vec!["some", "words", "for", "example"]]; let lines = colonnade.tabulate(&data)?; // ... later let data = vec![vec!["a very different, wider", "set of", "words that won't fit comfortably in the old layout"]]; // reflow table colonnade.lay_out(&data)?; let lines = colonnade.tabulate(&data)?;
pub fn spaces_between_rows(&mut self, n: usize)
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Specify a number of blank lines to insert between table rows.
Arguments
n
- A number of spaces.
Example
let mut colonnade = Colonnade::new(4, 100)?; // we want rows to be separated by a single blank line colonnade.spaces_between_rows(1);
pub fn priority(&mut self, priority: usize)
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Assign the same priority to all columns. By default, all columns have the lowest priority.
Priority determines the order in which columns give up space when the viewport lacks sufficient space to display all columns without wrapping. Lower priority columns give up space first.
Arguments
priority
- The common priority. Lower numbers confer higher priority; 0 is the highest priority.
Example
let mut colonnade = Colonnade::new(4, 100)?; // assign all columns the highest priority colonnade.priority(0); // now demote the last column colonnade.columns[3].priority(1);
pub fn max_width(&mut self, max_width: usize) -> Result<(), ColonnadeError>
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Assign the same maximum width to all columns. By default columns have no maximum width.
Arguments
max_width
- The common maximum width.
Errors
ColonnadeError::MinGreaterThanMax
- Assigning a maximum width in conflict with some assigned minimum width.
Example
let mut colonnade = Colonnade::new(4, 100)?; // assign all columns a maximum width of 20 colonnade.max_width(20)?; // at most we will now use only 83 of the characters provided by the viewport (until we mess with margins)
pub fn min_width(&mut self, min_width: usize) -> Result<(), ColonnadeError>
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Assign the same minimum width to all columns. By default columns have no minimum width.
Arguments
min_width
- The common minimum width.
Errors
ColonnadeError::MinGreaterThanMax
- Assigning a maximum width in conflict with some assigned minimum width.ColonnadeError::InsufficientSpace
- Assigning this minimum width means the columns require more space than the viewport provides.
Example
let mut colonnade = Colonnade::new(4, 100)?; // assign all columns a minimum width of 20 colonnade.min_width(20)?; // we will now use at least 83 of the characters provided by the viewport (until we mess with margins)
pub fn fixed_width(&mut self, width: usize) -> Result<(), ColonnadeError>
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Assign the same maximum and minimum width to all columns. By default columns have neither a maximum nor a minimum width.
Arguments
width
- The common width.
Errors
This method is a convenience method which assigns all columns the same maximum and minimum width. Therefore
the errors thrown are those thrown by max_width
and min_width
.
Example
let mut colonnade = Colonnade::new(4, 100)?; // assign all columns a width of 20 colonnade.fixed_width(20)?; // we will now use at exactly 83 of the characters provided by the viewport (until we mess with margins)
pub fn clear_limits(&mut self)
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Remove any maximum or minimum column widths.
Example
let mut colonnade = Colonnade::new(4, 100)?; // assign all columns a width of 20 colonnade.fixed_width(20)?; // later ... colonnade.clear_limits();
pub fn alignment(&mut self, alignment: Alignment)
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Assign all columns the same alignment. The default alignment is left.
Arguments
alignment
- The desired alignment.
Example
let mut colonnade = Colonnade::new(4, 100)?; // all columns should be right-aligned (they're numeric) colonnade.alignment(Alignment::Right);
pub fn vertical_alignment(&mut self, vertical_alignment: VerticalAlignment)
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Assign all columns the same vertical alignment. The default alignment is top.
Arguments
vertical_alignment
- The desired alignment.
Example
let mut colonnade = Colonnade::new(4, 100)?; // all columns should be right-aligned (they're numeric) colonnade.vertical_alignment(VerticalAlignment::Middle);
pub fn left_margin(&mut self, left_margin: usize) -> Result<(), ColonnadeError>
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Assign all columns the same left margin. The left margin is a number of blank spaces before the content of the column. By default the first column has a left margin of 0 and the other columns have a left margin of 1.
Arguments
left_margin
- The width in blank spaces of the desired margin.
Errors
ColonnadeError::InsufficientSpace
- This margin will require more space than is available in the viewport.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.left_margin(2)?;
pub fn padding(&mut self, padding: usize) -> Result<(), ColonnadeError>
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Assign all columns the same padding. The padding is a number of blank spaces before and after the contents of the column and a number of blank lines above and below it. By default the padding is 0. You most likely don't want any padding unless you are colorizing the text -- text immediately after color transitions is more difficult to read and less aesthetically pleasing.
Arguments
padding
- The width in blank spaces/lines of the desired padding.
Errors
ColonnadeError::InsufficientSpace
- This padding will require more space than is available in the viewport.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.padding(1)?;
pub fn padding_horizontal(
&mut self,
padding: usize
) -> Result<(), ColonnadeError>
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&mut self,
padding: usize
) -> Result<(), ColonnadeError>
Assign all columns the same horizontal padding -- space before and after the column's text.
See padding
.
Arguments
padding
- The width in blank spaces/lines of the desired padding.
Errors
ColonnadeError::InsufficientSpace
- This padding will require more space than is available in the viewport.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.padding_horizontal(1)?;
pub fn padding_left(&mut self, padding: usize) -> Result<(), ColonnadeError>
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Assign all columns the same left padding -- space before the column's text.
See padding
.
Arguments
padding
- The width in blank spaces/lines of the desired padding.
Errors
ColonnadeError::InsufficientSpace
- This padding will require more space than is available in the viewport.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.padding_left(1)?;
pub fn padding_right(&mut self, padding: usize) -> Result<(), ColonnadeError>
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Assign all columns the same right padding -- space after the column's text.
See padding
.
Arguments
padding
- The width in blank spaces/lines of the desired padding.
Errors
ColonnadeError::InsufficientSpace
- This padding will require more space than is available in the viewport.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.padding_right(1)?;
pub fn padding_vertical(&mut self, padding: usize)
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Assign all columns the same vertical padding -- blank lines before and after the column's text.
See padding
.
Arguments
padding
- The width in blank spaces/lines of the desired padding.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.padding_vertical(1);
pub fn padding_top(&mut self, padding: usize)
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Assign all columns the same top padding -- blank lines before the column's text.
See padding
.
Arguments
padding
- The width in blank spaces/lines of the desired padding.
Example
let mut colonnade = Colonnade::new(4, 100)?; colonnade.padding_top(1);
pub fn padding_bottom(&mut self, padding: usize)
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Trait Implementations
Auto Trait Implementations
impl Send for Colonnade
impl Sync for Colonnade
impl Unpin for Colonnade
impl UnwindSafe for Colonnade
impl RefUnwindSafe for Colonnade
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = !
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,