feat: Add ui.layout_columns() (#856)

CHANGELOG.md

@@ -14,6 +14,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Closed #814: The functions `reactive.Calc` and `reactive.Effect` have been changed to have lowercase names: `reactive.calc`, and `reactive.effect`. The old capitalized names are now aliases to the new lowercase names, so existing code will continue to work. Similarly, the class `reactive.Value` has a new alias, `reactive.value`, but in this case, since the original was a class, it keeps the original capitalized name as the primary name. The examples have not been changed yet, but will be changed in a future release. (#822)
 
+* Added `ui.layout_columns()` for creating responsive column-forward layouts based on Bootstrap's 12-column CSS Grid. (#856)
+
 ### Bug fixes
 
 * Fix support for `shiny.ui.accordion(multiple=)` (#799).

scripts/htmlDependencies.R

@@ -11,7 +11,7 @@ versions <- list()
 message("Installing GitHub packages: bslib, shiny, htmltools")
 withr::local_temp_libpaths()
 ignore <- capture.output({
-  pak::pkg_install(c("cran::bslib", "cran::shiny", "cran::htmltools"))
+  pak::pkg_install(c("rstudio/bslib", "cran::shiny", "cran::htmltools"))
   #pak::pkg_install(c("rstudio/bslib@main", "rstudio/shiny@main", "rstudio/htmltools@main"))
 })
 

shiny/_versions.py

@@ -1,5 +1,5 @@
 shiny_html_deps = "1.8.0"
-bslib = "0.6.1"
+bslib = "0.6.1.9000"
 htmltools = "0.5.7"
 bootstrap = "5.3.1"
 requirejs = "2.3.6"

shiny/express/layout.py

@@ -7,6 +7,7 @@
 
 from .. import ui
 from ..types import MISSING, MISSING_TYPE
+from ..ui._layout_columns import BreakpointsUser
 from ..ui.css import CssUnit
 from . import _run
 from ._recall_context import RecallContextManager, wrap_recall_context_manager
@@ -19,6 +20,7 @@
     "pre",
     "sidebar",
     "layout_column_wrap",
+    "layout_columns",
     "column",
     "row",
     "card",
@@ -206,6 +208,11 @@ def layout_column_wrap(
     -------
     :
         A :class:`~htmltools.Tag` element.
+
+    See Also
+    --------
+    * :func:`~shiny.express.layout.layout_columns` for laying out elements into a
+      responsive 12-column grid.
     """
     return RecallContextManager(
         ui.layout_column_wrap,
@@ -225,6 +232,110 @@ def layout_column_wrap(
     )
 
 
+def layout_columns(
+    *,
+    col_widths: BreakpointsUser[int] = None,
+    row_heights: BreakpointsUser[CssUnit] = None,
+    fill: bool = True,
+    fillable: bool = True,
+    gap: Optional[CssUnit] = None,
+    class_: Optional[str] = None,
+    height: Optional[CssUnit] = None,
+    **kwargs: TagAttrValue,
+):
+    """
+    Create responsive, column-based grid layouts, based on a 12-column grid.
+
+    Parameters
+    ----------
+    col_widths
+        The widths of the columns, possibly at different breakpoints. Can be one of the
+        following:
+
+        * `None` (the default): Automatically determines a sensible number of columns
+          based on the number of children given to the layout.
+        * A list or tuple of integers between 1 and 12, where each element represents
+          the number of columns for the relevant UI element. Column widths are recycled
+          to extend the values in `col_widths` to match the actual number of items in
+          the layout, and children are wrapped onto the next row when a row exceeds 12
+          column units. For example, `col_widths=(4, 8, 12)` allocates 4 columns to the
+          first element, 8 columns to the second element, and 12 columns to the third
+          element (which wraps to the next row). Negative values are also allowed, and
+          are treated as empty columns. For example, `col_widths=(-2, 8, -2)` would
+          allocate 8 columns to an element (with 2 empty columns on either side).
+        * A dictionary of column widths at different breakpoints. The keys should be
+          one of `"xs"`, `"sm"`, `"md"`, `"lg"`, `"xl"`, or `"xxl"`, and the values are
+          either of the above. For example, `col_widths={"sm": (3, 3, 6), "lg": (4)}`.
+
+    row_heights
+        The heights of the rows, possibly at different breakpoints. Can be one of the
+        following:
+
+        * A numeric vector, where each value represents the
+          [fractional unit](https://css-tricks.com/introduction-fr-css-unit/)
+          (`fr`) height of the relevant row. If there are more rows than values
+          provided, the pattern will be repeated. For example, `row_heights=(1, 2)`
+          allows even rows to take up twice as much space as odd rows.
+        * A list of numeric or CSS length units, where each value represents the height
+          of the relevant row. If more rows are needed than values provided, the pattern
+          will repeat. For example, `row_heights=["auto", 1]` allows the height of odd
+          rows to be driven my it's contents and even rows to be
+          [`1fr`](https://css-tricks.com/introduction-fr-css-unit/).
+        * A single string containing CSS length units. In this case, the value is
+          supplied directly to `grid-auto-rows`.
+        * A dictionary of row heights at different breakpoints, where each key is a
+          breakpoint name (one of `"xs"`, `"sm"`, `"md"`, `"lg"`, `"xl"`, or `"xxl"`)
+          and where the values may be any of the above options.
+
+    fill
+        Whether or not to allow the layout to grow/shrink to fit a fillable container
+        with an opinionated height (e.g., :func:`~shiny.ui.page_fillable`).
+
+    fillable
+        Whether or not each element is wrapped in a fillable container.
+
+    gap
+        Any valid CSS unit to use for the gap between columns.
+
+    class_
+        CSS class(es) to apply to the containing element.
+
+    height
+        Any valid CSS unit to use for the height.
+
+    **kwargs
+        Additional attributes to apply to the containing element.
+
+    Returns
+    -------
+    :
+        An :class:`~htmltools.Tag` element.
+
+    See Also
+    --------
+    * :func:`~shiny.express.layout.layout_column_wrap` for laying out elements into a
+      uniform grid.
+
+    Reference
+    --------
+    * [Bootstrap CSS Grid](https://getbootstrap.com/docs/5.3/layout/grid/)
+    * [Bootstrap Breakpoints](https://getbootstrap.com/docs/5.3/layout/breakpoints/)
+    """
+    return RecallContextManager(
+        ui.layout_columns,
+        kwargs=dict(
+            col_widths=col_widths,
+            row_heights=row_heights,
+            fill=fill,
+            fillable=fillable,
+            gap=gap,
+            class_=class_,
+            height=height,
+            **kwargs,
+        ),
+    )
+
+
 def column(width: int, *, offset: int = 0, **kwargs: TagAttrValue):
     """
     Responsive row-column based layout

shiny/ui/__init__.py

@@ -23,6 +23,7 @@
 )
 
 from ._layout import layout_column_wrap
+from ._layout_columns import layout_columns
 
 
 # Expose the following modules for extended usage: ex: ui.fill.as_fill_item(x)
@@ -185,6 +186,7 @@
     "panel_sidebar",
     "panel_main",
     # _layout
+    "layout_columns",
     "layout_column_wrap",
     # _card
     "CardItem",

shiny/ui/_layout.py

@@ -83,6 +83,11 @@ def layout_column_wrap(
     -------
     :
         A :class:`~htmltools.Tag` element.
+
+    See Also
+    --------
+    * :func:`~shiny.ui.layout_columns` for laying out elements into a responsive
+      12-column grid.
     """
     attrs, children = consolidate_attrs(*args, class_=class_, **kwargs)