[elpa] master dfeaec0 029/399: swiper.el (swiper--update-input-ivy): Don't rely on window-start in terminal

[Oleh Krehel]

branch: master
commit dfeaec0d5410a57ee5b55af5d9e1a25067bf28c3
Author: Oleh Krehel <address@hidden>
Commit: Oleh Krehel <address@hidden>

    swiper.el (swiper--update-input-ivy): Don't rely on window-start in terminal
    
    `window-start' and `window-end' is not reliable when in a terminal. It
    can be made reliable if a `redisplay' is performed, but then we get
    annoying blinking.
    
    So let's define `window-start' as the location of `window-height'
    lines above `point'. We may add a few extra overlays here and there,
    but the performance shouldn't suffer, since the area is roughly equal
    to the window size anyway.
    
    Fixes #1928
---
 swiper.el | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/swiper.el b/swiper.el
index 224d13e..5480465 100644
--- a/swiper.el
+++ b/swiper.el
@@ -700,8 +700,16 @@ Matched candidates should have `swiper-invocation-face'."
                 (setq swiper--current-window-start (window-start))))
             (swiper--add-overlays
              re
-             (max (window-start) swiper--point-min)
-             (min (window-end (selected-window) t) swiper--point-max))))))))
+             (max
+              (if (display-graphic-p)
+                  (window-start)
+                (line-beginning-position (- (window-height))))
+              swiper--point-min)
+             (min
+              (if (display-graphic-p)
+                  (window-end (selected-window) t)
+                (line-end-position (window-height)))
+              swiper--point-max))))))))
 
 (defun swiper--add-overlays (re &optional beg end wnd)
   "Add overlays for RE regexp in visible part of the current buffer.