Dropping support for Bokeh 2

holoviews/plotting/bokeh/callbacks.py

@@ -25,7 +25,7 @@
     BoxEdit, PointDraw, PolyDraw, PolyEdit, CDSStream, FreehandDraw,
     CurveEdit, SelectionXY, Lasso, SelectMode
 )
-from .util import bokeh3, convert_timestamp
+from .util import convert_timestamp
 
 
 class Callback:
@@ -617,23 +617,6 @@ class RangeXYCallback(Callback):
         'y1': 'cb_obj.y1',
     }
 
-    _js_on_event = """
-    if (this._updating)
-        return
-    const plot = this.origin
-    const plots = plot.x_range.plots.concat(plot.y_range.plots)
-    for (const p of plots) {
-      const event = new this.constructor(p.x_range.start, p.x_range.end, p.y_range.start, p.y_range.end)
-      event._updating = true
-      p.trigger_event(event)
-    }
-    """
-
-    def set_callback(self, handle):
-        super().set_callback(handle)
-        if not bokeh3:
-            handle.js_on_event('rangesupdate', CustomJS(code=self._js_on_event))
-
     def _process_msg(self, msg):
         if self.plot.state.x_range is not self.plot.handles['x_range']:
             x_range = self.plot.handles['x_range']

holoviews/plotting/bokeh/element.py

@@ -49,7 +49,7 @@
 )
 from .tabular import TablePlot
 from .util import (
-    TOOL_TYPES, bokeh_version, bokeh3, bokeh32, date_to_integer,
+    TOOL_TYPES, bokeh_version, bokeh32, date_to_integer,
     decode_bytes, get_tab_title, glyph_order, py2js_tickformatter,
     recursive_model_update, theme_attr_json, cds_column_replace,
     hold_policy, match_dim_specs, compute_layout_properties,
@@ -58,12 +58,8 @@
     get_scale, get_axis_class
 )
 
-if bokeh3:
-    from bokeh.models.formatters import CustomJSTickFormatter
-    from bokeh.models.layouts import TabPanel
-else:
-    from bokeh.models.formatters import FuncTickFormatter as CustomJSTickFormatter
-    from bokeh.models.layouts import Panel as TabPanel
+from bokeh.models.formatters import CustomJSTickFormatter
+from bokeh.models.layouts import TabPanel
 
 try:
     TOOLS_MAP = Tool._known_aliases
@@ -629,10 +625,7 @@ def _init_plot(self, key, element, plots, ranges=None):
 
         properties.update(**self._plot_properties(key, element))
 
-        if bokeh3:
-            figure = bokeh.plotting.figure
-        else:
-            figure = bokeh.plotting.Figure
+        figure = bokeh.plotting.figure
 
         with warnings.catch_warnings():
             # Bokeh raises warnings about duplicate tools but these
@@ -1633,18 +1626,13 @@ def _update_glyph(self, renderer, properties, mapping, glyph, source, data):
             server = self.renderer.mode == 'server'
             with hold_policy(self.document, 'collect', server=server):
                 empty_data = {c: [] for c in columns}
-                if bokeh3:
-                    event = ModelChangedEvent(
-                        document=self.document,
-                        model=source,
-                        attr='data',
-                        new=empty_data,
-                        setter='empty'
-                    )
-                else:
-                    event = ModelChangedEvent(
-                        self.document, source, 'data', source.data, empty_data, empty_data, setter='empty'
-                    )
+                event = ModelChangedEvent(
+                    document=self.document,
+                    model=source,
+                    attr='data',
+                    new=empty_data,
+                    setter='empty'
+                )
                 self.document.callbacks._held_events.append(event)
 
         if legend is not None:
@@ -2474,7 +2462,7 @@ def _process_legend(self, plot=None):
             or not self.show_legend):
             legend.items[:] = []
         else:
-            if bokeh3 and self.legend_cols:
+            if self.legend_cols:
                 plot.legend.nrows = self.legend_cols
             else:
                 plot.legend.orientation = 'horizontal' if self.legend_cols else 'vertical'
@@ -2576,8 +2564,6 @@ def _process_legend(self, overlay):
             options[k] = v
 
         pos = self.legend_position
-        if not bokeh3:
-            options['orientation'] = 'horizontal' if self.legend_cols else 'vertical'
         if pos in ['top', 'bottom'] and not self.legend_cols:
             options['orientation'] = 'horizontal'
 
@@ -2587,7 +2573,7 @@ def _process_legend(self, overlay):
 
         options.update(self._fontsize('legend', 'label_text_font_size'))
         options.update(self._fontsize('legend_title', 'title_text_font_size'))
-        if bokeh3 and self.legend_cols:
+        if self.legend_cols:
             options.update({"ncols": self.legend_cols})
         legend.update(**options)
 

holoviews/plotting/bokeh/graphs.py

@@ -19,7 +19,6 @@
     base_properties, line_properties, fill_properties, text_properties,
     rgba_tuple
 )
-from .util import bokeh3
 
 
 class GraphPlot(GraphMixin, CompositeElementPlot, ColorbarPlot, LegendPlot):
@@ -185,8 +184,6 @@ def get_data(self, element, ranges, style):
             index = nodes.astype(np.int32)
             layout = {k: (y, x) if self.invert_axes else (x, y)
                       for k, (x, y) in zip(index, node_positions)}
-        if not bokeh3:
-            layout = {str(k): v for k, v in layout.items()}
 
         point_data = {'index': index}
 

holoviews/plotting/bokeh/links.py

@@ -2,20 +2,15 @@
 
 from bokeh.models import CustomJS
 from bokeh.models.tools import RangeTool
+from bokeh.models import Toolbar
 
-from .util import bokeh3
 from ...core.util import isscalar
 from ..links import (
     Link, RectanglesTableLink, DataLink, RangeToolLink,
     SelectionLink, VertexTableLink
 )
 from ..plot import GenericElementPlot, GenericOverlayPlot
 
-if bokeh3:
-    from bokeh.models import Toolbar
-else:
-    from bokeh.models import ToolbarBox as Toolbar  # Not completely correct
-
 
 class LinkCallback:
 
@@ -158,11 +153,8 @@ def __init__(self, root_model, link, source_plot, target_plot):
 
         tool = RangeTool(**axes)
         source_plot.state.add_tools(tool)
-        if bokeh3 and toolbars:
+        if toolbars:
             toolbars[0].tools.append(tool)
-        elif toolbars:
-            toolbar = toolbars[0].toolbar
-            toolbar.tools.append(tool)
 
 
 class DataLinkCallback(LinkCallback):
@@ -206,8 +198,6 @@ def __init__(self, root_model, link, source_plot, target_plot):
             renderer.update(data_source=src_cds)
         else:
             renderer.update(source=src_cds)
-        if not bokeh3 and hasattr(renderer, 'view'):
-            renderer.view.update(source=src_cds)
         target_plot.handles['source'] = src_cds
         target_plot.handles['cds'] = src_cds
         for callback in target_plot.callbacks:

holoviews/plotting/bokeh/plot.py

@@ -30,14 +30,11 @@
 from ..util import attach_streams, displayable, collate
 from .links import LinkCallback
 from .util import (
-    bokeh3, filter_toolboxes, make_axis, sync_legends, update_shared_sources, empty_plot,
+    filter_toolboxes, make_axis, sync_legends, update_shared_sources, empty_plot,
     decode_bytes, theme_attr_json, cds_column_replace, get_default, merge_tools, select_legends
 )
 
-if bokeh3:
-    from bokeh.models.layouts import TabPanel
-else:
-    from bokeh.models.layouts import Panel as TabPanel
+from bokeh.models.layouts import TabPanel
 
 
 class BokehPlot(DimensionedPlot, CallbackPlot):
@@ -271,10 +268,9 @@ def _get_title_div(self, key, default_fontsize='15pt', width=450):
 
         if 'title' in self.handles:
             title_div = self.handles['title']
-        elif bokeh3:
-            title_div = Div(width=width, styles={"white-space": "nowrap"})  # so it won't wrap long titles easily
         else:
-            title_div = Div(width=width, style={"white-space": "nowrap"})  # so it won't wrap long titles easily
+            # so it won't wrap long titles easily
+            title_div = Div(width=width, styles={"white-space": "nowrap"})
         title_div.text = title_tags
 
         return title_div
@@ -310,8 +306,6 @@ def sync_sources(self):
                         renderer.update(data_source=new_source)
                     else:
                         renderer.update(source=new_source)
-                    if not bokeh3 and hasattr(renderer, 'view'):
-                        renderer.view.update(source=new_source)
                     plot.handles['source'] = plot.handles['cds'] = new_source
                     plots.append(plot)
                 shared_sources.append(new_source)
@@ -592,7 +586,7 @@ def initialize_plot(self, ranges=None, plots=[]):
         if self.sync_legends:
             sync_legends(plot)
         plot = self._make_axes(plot)
-        if bokeh3 and hasattr(plot, "toolbar") and self.merge_tools:
+        if hasattr(plot, "toolbar") and self.merge_tools:
             plot.toolbar = merge_tools(plots)
 
         title = self._get_title_div(self.keys[-1])
@@ -645,7 +639,7 @@ def _make_axes(self, plot):
                 x_axis.margin = (0, 0, 0, 50)
                 r1, r2 = r1[::-1], r2[::-1]
             plot = gridplot([r1, r2], merge_tools=False)
-            if bokeh3 and self.merge_tools:
+            if self.merge_tools:
                 plot.toolbar = merge_tools([r1, r2])
         elif y_axis:
             models = [y_axis, plot]
@@ -952,7 +946,7 @@ def initialize_plot(self, plots=None, ranges=None):
                                         merge_tools=False,
                                         toolbar_location=self.toolbar,
                                         sizing_mode=sizing_mode)
-                        if bokeh3 and self.merge_tools:
+                        if self.merge_tools:
                             grid.toolbar = merge_tools(children)
                     tab_plots.append((title, grid))
                     continue
@@ -994,7 +988,7 @@ def initialize_plot(self, plots=None, ranges=None):
             )
             if self.sync_legends:
                 sync_legends(layout_plot)
-            if bokeh3 and self.merge_tools:
+            if self.merge_tools:
                 layout_plot.toolbar = merge_tools(plot_grid)
 
         title = self._get_title_div(self.keys[-1])

holoviews/plotting/bokeh/raster.py

@@ -12,7 +12,7 @@
 from .element import ColorbarPlot, LegendPlot
 from .selection import BokehOverlaySelectionDisplay
 from .styles import base_properties, fill_properties, line_properties, mpl_to_bokeh
-from .util import bokeh3, colormesh
+from .util import colormesh
 
 
 class RasterPlot(ColorbarPlot):
@@ -102,10 +102,6 @@ def get_data(self, element, ranges, style):
                 l, b, r, t = b, l, t, r
 
         dh, dw = t-b, r-l
-        if self.invert_xaxis and not bokeh3:
-            l, r = r, l
-        if self.invert_yaxis and not bokeh3:
-            b, t = t, b
         data = dict(x=[l], y=[b], dw=[dw], dh=[dh])
 
         for i, vdim in enumerate(element.vdims, 2):
@@ -118,10 +114,6 @@ def get_data(self, element, ranges, style):
                 img = np.array([[np.NaN]])
             if self.invert_axes ^ (type(element) is Raster):
                 img = img.T
-            if self.invert_xaxis and not bokeh3:
-                img = img[:, ::-1]
-            if self.invert_yaxis and not bokeh3:
-                img = img[::-1]
             key = 'image' if i == 2 else dimension_sanitizer(vdim.name)
             data[key] = [img]
 
@@ -212,12 +204,6 @@ def get_data(self, element, ranges, style):
             l, b, r, t = b, l, t, r
 
         dh, dw = t-b, r-l
-        if self.invert_xaxis and not bokeh3:
-            l, r = r, l
-            img = img[:, ::-1]
-        if self.invert_yaxis and not bokeh3:
-            img = img[::-1]
-            b, t = t, b
 
         if 0 in img.shape:
             img = np.zeros((1, 1), dtype=np.uint32)