Map gestures to configurable actions

src/pyj/read_book/flow_mode.pyj

@@ -23,7 +23,6 @@ from __python__ import bound_methods, hash_literals
 from dom import set_css
 from range_utils import wrap_range, unwrap
 from read_book.cfi import scroll_to as cfi_scroll_to
-from read_book.touch import GESTURE
 from read_book.globals import current_spine_item, get_boss, rtl_page_progression, ltr_page_progression
 from read_book.settings import opts
 from read_book.viewport import line_height, rem_size, scroll_viewport
@@ -537,9 +536,9 @@ def start_drag_scroll(delta):
 
 def handle_gesture(gesture):
     flick_animator.stop()
-    if gesture.type is GESTURE.flick_block_forward or gesture.type is GESTURE.flick_block_backward:
+    if gesture.resolved_action is 'animated_scroll':
         flick_animator.start(gesture)
-    elif gesture.type.startsWith('swipe_') and gesture.type.endsWith('_in_progress'):
+    elif gesture.resolved_action is 'pan':
         if gesture.points.length > 1 and not gesture.is_held:
             delta = gesture.points[-2] - gesture.points[-1]
             if Math.abs(delta) >= 1:
@@ -559,11 +558,11 @@ def handle_gesture(gesture):
                     # In horizontal modes, just move by the delta.
                     else:
                         scroll_viewport.scroll_by(delta, 0)
-    elif gesture.type is GESTURE.back_zone_tap:
+    elif gesture.resolved_action is 'prev_page' or gesture.resolved_action is 'prev_screen':
         # should flip = False - previous is previous whether RTL or LTR.
         # flipping of this command is handled higher up
         scroll_by_page(-1, False)
-    elif gesture.type is GESTURE.forward_zone_tap:
+    elif gesture.resolved_action is 'next_page' or gesture.resolved_action is 'next_screen':
         # should flip = False - next is next whether RTL or LTR.
         # flipping of this command is handled higher up
         scroll_by_page(1, False)

src/pyj/read_book/gestures.pyj

@@ -0,0 +1,49 @@
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2023, Kovid Goyal <kovid at kovidgoyal.net>
+from __python__ import bound_methods, hash_literals
+
+from read_book.touch import GESTURE
+from read_book.settings import opts
+
+default_actions_for_gesture = {
+    'common': {
+        GESTURE.back_zone_tap: 'prev_page',
+        GESTURE.forward_zone_tap: 'next_page',
+        GESTURE.control_zone_tap: 'show_chrome',
+        GESTURE.two_finger_tap: 'show_chrome',
+        GESTURE.long_tap: 'highlight_or_inspect',
+        GESTURE.pinch_in: 'decrease_font_size',
+        GESTURE.pinch_out: 'increase_font_size',
+    },
+    'flow_mode': {
+        GESTURE.swipe_inline_backward_in_progress: 'pan',
+        GESTURE.swipe_inline_forward_in_progress: 'pan',
+        GESTURE.swipe_block_backward_in_progress: 'pan',
+        GESTURE.swipe_block_forward_in_progress: 'pan',
+        GESTURE.flick_block_forward: 'animated_scroll',
+        GESTURE.flick_block_backward: 'animated_scroll',
+        GESTURE.flick_inline_forward: 'animated_scroll',
+        GESTURE.flick_inline_backward: 'animated_scroll',
+    },
+    'paged_mode': {
+        GESTURE.flick_block_forward: 'next_section',
+        GESTURE.flick_block_backward: 'prev_section',
+        GESTURE.flick_inline_forward: 'next_screen',
+        GESTURE.flick_inline_backward: 'prev_screen',
+        GESTURE.swipe_inline_forward_hold: 'next_screen',
+        GESTURE.swipe_inline_backward_hold: 'prev_screen',
+    },
+}
+
+def action_for_gesture(gesture, in_flow_mode):
+    overrides = opts.gesture_overrides
+    mode = 'flow_mode' if in_flow_mode else 'paged_mode'
+    mode_overrides = overrides[mode] or {}
+    if mode_overrides[gesture.type]:
+        return mode_overrides[gesture.type]
+    common_overrides = overrides.common or {}
+    if common_overrides[gesture.type]:
+        return common_overrides[gesture.type]
+    if default_actions_for_gesture[mode][gesture.type]:
+        return default_actions_for_gesture[mode][gesture.type]
+    return default_actions_for_gesture.common[gesture.type] or 'none'

src/pyj/read_book/iframe.pyj

@@ -9,7 +9,6 @@ from range_utils import (
     all_annots_in_selection, highlight_associated_with_selection, last_span_for_crw,
     reset_highlight_counter, select_crw, unwrap_all_crw, unwrap_crw, wrap_text_in_range
 )
-from read_book.touch import GESTURE
 from read_book.cfi import cfi_for_selection, range_from_cfi
 from read_book.extract import get_elements
 from read_book.find import (
@@ -27,6 +26,7 @@ from read_book.flow_mode import (
     start_drag_scroll as start_drag_scroll_flow
 )
 from read_book.footnotes import is_footnote_link
+from read_book.gestures import action_for_gesture
 from read_book.globals import (
     annot_id_uuid_map, clear_annot_id_uuid_map, current_book, current_layout_mode,
     current_spine_item, runtime, set_boss, set_current_spine_item, set_layout_mode,
@@ -316,13 +316,14 @@ class IframeBoss:
         self.auto_scroll_action('toggle')
 
     def handle_gesture(self, gesture):
-        if gesture.type is GESTURE.control_zone_tap or gesture.type is GESTURE.two_finger_tap:
+        gesture.resolved_action = action_for_gesture(gesture, current_layout_mode() is 'flow')
+        if gesture.resolved_action is 'show_chrome':
             self.send_message('show_chrome')
-        elif gesture.type is GESTURE.pinch_in:
+        elif gesture.resolved_action is 'decrease_font_size':
             self.send_message('bump_font_size', increase=False)
-        elif gesture.type is GESTURE.pinch_out:
+        elif gesture.resolved_action is 'increase_font_size':
             self.send_message('bump_font_size', increase=True)
-        elif gesture.type is GESTURE.long_tap:
+        elif gesture.resolved_action is 'highlight_or_inspect':
             self.handle_long_tap(gesture)
         else:
             self._handle_gesture(gesture)

src/pyj/read_book/paged_mode.pyj

@@ -32,7 +32,6 @@ from read_book.cfi import (
     scroll_to as cfi_scroll_to
 )
 from read_book.globals import current_spine_item, get_boss, rtl_page_progression
-from read_book.touch import GESTURE
 from read_book.settings import opts
 from read_book.viewport import scroll_viewport, line_height, rem_size, get_unit_size_in_pixels
 from utils import (
@@ -811,18 +810,18 @@ def handle_shortcut(sc_name, evt):
 def handle_gesture(gesture):
     # Gesture progression direction is determined in the gesture code,
     # don't set flip_if_rtl_page_progression=True here.
-    if gesture.type is GESTURE.flick_block_forward:
+    if gesture.resolved_action is 'next_section':
         get_boss().send_message('next_section', forward=True)
-    elif gesture.type is GESTURE.flick_block_backward:
+    elif gesture.resolved_action is 'prev_section':
         get_boss().send_message('next_section', forward=False)
-    elif gesture.type is GESTURE.flick_inline_forward or gesture.type is GESTURE.swipe_inline_forward_hold:
+    elif gesture.resolved_action is 'next_screen':
         scroll_by_page(False, True)
-    elif gesture.type is GESTURE.flick_inline_backward or gesture.type is GESTURE.swipe_inline_backward_hold:
+    elif gesture.resolved_action is 'prev_screen':
         scroll_by_page(True, True)
-    elif gesture.type is GESTURE.back_zone_tap:
+    elif gesture.resolved_action is 'prev_page':
-        scroll_by_page(True, opts.paged_taps_scroll_by_screen)
+        scroll_by_page(True, False)
-    elif gesture.type is GESTURE.forward_zone_tap:
+    elif gesture.resolved_action is 'next_page':
-        scroll_by_page(False, opts.paged_taps_scroll_by_screen)
+        scroll_by_page(False, False)
 
 
 anchor_funcs = {

src/pyj/read_book/prefs/scrolling.pyj

@@ -69,8 +69,6 @@ def create_scrolling_panel(container, apply_func, cancel_func):
         'paged_wheel_scrolls_by_screen', _('Mouse wheel scrolls by screen fulls instead of pages')))
     container.lastChild.appendChild(cb(
         'paged_margin_clicks_scroll_by_screen', _('Clicking on the margins scrolls by screen fulls instead of pages')))
-    container.lastChild.appendChild(cb(
-        'paged_taps_scroll_by_screen', _('Tapping scrolls by screen fulls instead of pages')))
     container.lastChild.appendChild(
         E.div(style='display:grid;margin-top:1ex;align-items:center;grid-template-columns:auto min-content;grid-gap:1ex; max-width: 30em',
             *spinner(

src/pyj/read_book/settings.pyj

@@ -27,11 +27,11 @@ def update_settings(settings):
     opts.override_book_colors = settings.override_book_colors
     opts.paged_wheel_scrolls_by_screen = v'!!settings.paged_wheel_scrolls_by_screen'
     opts.paged_pixel_scroll_threshold = settings.paged_pixel_scroll_threshold
-    opts.paged_taps_scroll_by_screen = v'!!settings.paged_taps_scroll_by_screen'
     opts.scroll_auto_boundary_delay = settings.scroll_auto_boundary_delay
     opts.scroll_stop_boundaries = v'!!settings.scroll_stop_boundaries'
     opts.reverse_page_turn_zones = v'!!settings.reverse_page_turn_zones'
     opts.user_stylesheet = settings.user_stylesheet
+    opts.gesture_overrides = settings.gesture_overrides
 
 update_settings()
 

src/pyj/read_book/touch.pyj

@@ -20,6 +20,7 @@ GESTURE_NAMES = {
     'two_finger_tap': _('Two finger tap'),
     'pinch_in': _('Pinch in'),
     'pinch_out': _('Pinch out'),
+
     'flick_inline_backward': _('Flick in writing direction, backwards'),
     'flick_inline_forward': _('Flick in writing direction, forwards'),
     'flick_block_backward': _('Flick perpendicular to writing direction, backwards'),

src/pyj/read_book/view.pyj

@@ -1017,12 +1017,12 @@ class View:
             'cover_preserve_aspect_ratio': sd.get('cover_preserve_aspect_ratio'),
             'paged_wheel_scrolls_by_screen': sd.get('paged_wheel_scrolls_by_screen'),
             'paged_pixel_scroll_threshold': sd.get('paged_pixel_scroll_threshold'),
-            'paged_taps_scroll_by_screen': sd.get('paged_taps_scroll_by_screen'),
             'lines_per_sec_auto': sd.get('lines_per_sec_auto'),
             'lines_per_sec_smooth': sd.get('lines_per_sec_smooth'),
             'scroll_auto_boundary_delay': sd.get('scroll_auto_boundary_delay'),
             'scroll_stop_boundaries': sd.get('scroll_stop_boundaries'),
             'reverse_page_turn_zones': sd.get('reverse_page_turn_zones'),
+            'gesture_overrides': sd.get('gesture_overrides'),
         }
 
     def show_name(self, name, initial_position=None):

src/pyj/session.pyj

@@ -53,7 +53,6 @@ defaults = {
     'override_book_colors': 'never',
     'paged_margin_clicks_scroll_by_screen': True,
     'paged_wheel_scrolls_by_screen': False,
-    'paged_taps_scroll_by_screen': False,
     'paged_pixel_scroll_threshold': 60,
     'read_mode': 'paged',
     'scroll_auto_boundary_delay': 5,
@@ -78,6 +77,7 @@ defaults = {
     'book_search_mode': 'contains',
     'book_search_case_sensitive': False,
     'reverse_page_turn_zones': False,
+    'gesture_overrides': {},
 }
 
 is_local_setting = {