diff options
Diffstat (limited to 'modules/calibredb-epub-config.el')
| -rw-r--r-- | modules/calibredb-epub-config.el | 49 |
1 files changed, 31 insertions, 18 deletions
diff --git a/modules/calibredb-epub-config.el b/modules/calibredb-epub-config.el index a17bf8c91..6d5963515 100644 --- a/modules/calibredb-epub-config.el +++ b/modules/calibredb-epub-config.el @@ -241,6 +241,29 @@ layout passes -- each pass narrows the body width but not the natural width." "Return the preferred EPUB text column count for WINDOW." (cj/nov--text-width (cj/nov--natural-window-width window))) +(defun cj/nov--rerender-preserving-position () + "Re-render the nov document, restoring point's relative position. +Capture point as a fraction of the buffer, re-render, then move point to the +same fraction of the re-rendered buffer so the reading position is kept +approximately." + (let ((frac (when (> (point-max) (point-min)) + (/ (float (- (point) (point-min))) + (- (point-max) (point-min)))))) + (nov-render-document) + (when frac + (goto-char (+ (point-min) + (round (* frac (- (point-max) (point-min))))))))) + +(defun cj/nov--center-in-window (win total width) + "Center a WIDTH-column text block in WIN, given its TOTAL natural width. +Set equal left/right display margins and push the fringes to the window edge." + ;; floor: never let the margins squeeze the text area below WIDTH. + (let ((margin (max 0 (/ (- total width) 2)))) + (set-window-margins win margin margin)) + ;; Push the fringes out to the window's edge; otherwise they sit between the + ;; margin and the text and show as thin vertical lines beside it. + (set-window-fringes win nil nil t)) + (defun cj/nov-update-layout (&optional _frame) "Size the EPUB text column for this buffer and center it in its window. `nov-text-width' is set so nov's `shr' fills the text to roughly 80% of the @@ -256,20 +279,9 @@ command." (width (cj/nov--text-width total))) (unless (eql nov-text-width width) (setq-local nov-text-width width) - (let ((frac (when (> (point-max) (point-min)) - (/ (float (- (point) (point-min))) - (- (point-max) (point-min)))))) - (nov-render-document) - (when frac - (goto-char (+ (point-min) - (round (* frac (- (point-max) (point-min))))))))) + (cj/nov--rerender-preserving-position)) (when win - ;; floor: never let the margins squeeze the text area below WIDTH. - (let ((margin (max 0 (/ (- total width) 2)))) - (set-window-margins win margin margin)) - ;; Push the fringes out to the window's edge; otherwise they sit between - ;; the margin and the text and show as thin vertical lines beside it. - (set-window-fringes win nil nil t))))) + (cj/nov--center-in-window win total width))))) (defun cj/--nov-adjust-margin (delta) "Add DELTA to `cj/nov-margin-percent' (clamped 0..25), re-lay-out, and report. @@ -293,11 +305,12 @@ A positive DELTA narrows the text column; a negative DELTA widens it." (defun cj/nov-apply-preferences () "Apply preferences after nov-mode has launched." (interactive) - ;; Use Merriweather for comfortable reading with appropriate scaling - ;; Darker sepia color (#E8DCC0) is easier on the eyes than pure white - (face-remap-add-relative 'variable-pitch :family "Merriweather" :height 1.0 :foreground "#E8DCC0") - (face-remap-add-relative 'default :family "Merriweather" :height 180 :foreground "#E8DCC0") - (face-remap-add-relative 'fixed-pitch :height 180 :foreground "#E8DCC0") + ;; Use Merriweather for comfortable reading with appropriate scaling. + ;; Darker sepia color (#E8DCC0) is easier on the eyes than pure white. + (let ((sepia "#E8DCC0")) + (face-remap-add-relative 'variable-pitch :family "Merriweather" :height 1.0 :foreground sepia) + (face-remap-add-relative 'default :family "Merriweather" :height 180 :foreground sepia) + (face-remap-add-relative 'fixed-pitch :height 180 :foreground sepia)) ;; Enable visual-line-mode for proper text wrapping (visual-line-mode 1) ;; Set fill-column as a fallback |