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Cosmetic: move function up in file.

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This just moves keep_pointer_in_view() to be adjacent to recenter_view()
in the file.

(imported from commit 27056e2a949ffef262ac21130436f7303fd2935f)
This commit is contained in:
Steve Howell
2013-06-05 11:56:43 -04:00
parent 042cd8f222
commit 8be0ea972a
1 changed files with 44 additions and 44 deletions
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88
zephyr/static/js/zephyr.js
View File

@@ -81,6 +81,50 @@ function within_viewport(row_offset, row_height) {
return (message_top > viewport_top) && (message_bottom < viewport_bottom);
}
function keep_pointer_in_view() {
// See recenter_view() for related logic to keep the pointer onscreen.
// This function mostly comes into place for mouse scrollers, and it
// keeps the pointer in view. For people who purely scroll with the
// mouse, the pointer is kind of meaningless to them, but keyboard
// users will occasionally do big mouse scrolls, so this gives them
// a pointer reasonably close to the middle of the screen.
var candidate;
var next_row = current_msg_list.selected_row();
if (next_row.length === 0)
return;
var info = ui.message_viewport_info();
var top_threshold = info.visible_top + (1/10 * info.visible_height);
var bottom_threshold = info.visible_top + (9/10 * info.visible_height);
function above_view_threshold() {
var bottom_offset = next_row.offset().top + next_row.outerHeight(true);
return bottom_offset < top_threshold;
}
function below_view_threshold() {
return next_row.offset().top > bottom_threshold;
}
function adjust(past_threshold, at_end, advance) {
if (!past_threshold(next_row) || at_end())
return false; // try other side
while (past_threshold(next_row)) {
candidate = advance(next_row);
if (candidate.length === 0)
break;
next_row = candidate;
}
return true;
}
if (! adjust(above_view_threshold, viewport.at_top, rows.next_visible))
adjust(below_view_threshold, viewport.at_bottom, rows.prev_visible);
current_msg_list.select_id(rows.id(next_row), {from_scroll: true});
}
function recenter_view(message, from_scroll) {
// Barnowl-style recentering: if the pointer is too high, move it to
// the 1/2 marks. If the pointer is too low, move it to the 1/7 mark.
@@ -1141,50 +1185,6 @@ setInterval(function () {
watchdog_time = new_time;
}, 5000);
function keep_pointer_in_view() {
// See recenter_view() for related logic to keep the pointer onscreen.
// This function mostly comes into place for mouse scrollers, and it
// keeps the pointer in view. For people who purely scroll with the
// mouse, the pointer is kind of meaningless to them, but keyboard
// users will occasionally do big mouse scrolls, so this gives them
// a pointer reasonably close to the middle of the screen.
var candidate;
var next_row = current_msg_list.selected_row();
if (next_row.length === 0)
return;
var info = ui.message_viewport_info();
var top_threshold = info.visible_top + (1/10 * info.visible_height);
var bottom_threshold = info.visible_top + (9/10 * info.visible_height);
function above_view_threshold() {
var bottom_offset = next_row.offset().top + next_row.outerHeight(true);
return bottom_offset < top_threshold;
}
function below_view_threshold() {
return next_row.offset().top > bottom_threshold;
}
function adjust(past_threshold, at_end, advance) {
if (!past_threshold(next_row) || at_end())
return false; // try other side
while (past_threshold(next_row)) {
candidate = advance(next_row);
if (candidate.length === 0)
break;
next_row = candidate;
}
return true;
}
if (! adjust(above_view_threshold, viewport.at_top, rows.next_visible))
adjust(below_view_threshold, viewport.at_bottom, rows.prev_visible);
current_msg_list.select_id(rows.id(next_row), {from_scroll: true});
}
// The idea here is when you've scrolled to the very
// bottom of the page, e.g., the scroll handler isn't
// going to fire anymore. But if I continue to use