;;; earnecore-display.el --- Display -*- lexical-binding: t; -*-

;; Copyright (C) 2020-2021 earnest ma
;; SPDX-License-Identifier: MIT
;; Author: earnest ma <me@earne.link>

;;; Code:
;; Misc
(setq frame-title-format (list "%b %* " earnemacs-daemon-name "@" system-name)
      truncate-string-ellipsis "…"
      use-file-dialog nil
      use-dialog-box nil)

;; Show column number in modeline
(setq-default column-number-mode t)

;; Font: More set below, this is just in case for the daemon
(add-to-list 'default-frame-alist '(font . "Fira Code 11"))

;; Modeline
(use-package doom-modeline
  :demand
  :init (doom-modeline-mode 1)
  :config
  (display-time-mode 1)
  (if (equal "Battery status not available"
        (battery))
    ()
    (display-battery-mode 1)))

;; Dashboard
(use-package dashboard
  :demand
  ;; Prevent issues when opening through Daemon - will see scratch buffer instead
  :if (< (length command-line-args) 2)

  :config
  (dashboard-setup-startup-hook)

  ;; Customizations
  (setq dashboard-banner-logo-title "Welcome to earnemacs!")
  (setq dashboard-startup-banner 'logo)
  (setq dashboard-set-footer nil)
  (setq dashboard-items
    '((recents . 5)
       (bookmarks . 5)
       (agenda . 5)
       (projects . 5))))

;; Tabs
(use-package tab-bar
  :straight nil
  :bind
  (:map tab-prefix-map
    ("n" . tab-next)
    ("p" . tab-previous)
    ("t" . tab-new)
    ("x" . tab-close)
    ("X" . tab-close-other)
    ("C-x" . tab-bar-undo-close-tab))
  :general
  (earnemacs-spc-def "T" '(:keymap tab-prefix-map :wk "Tab"))
  :init
  (tab-bar-mode))

;; Scrolling
(setq mouse-wheel-scroll-amount '(2 ((shift) . 1)))
(setq mouse-wheel-progressive-speed nil)
(setq mouse-wheel-follow-mouse 't)
(setq scroll-step 1)

;; Frame opacity
(defun earnemacs-adjust-opacity (frame incr)
  "Adjust the background opacity of FRAME by increment INCR.
From purcell/emacs.d"
  (unless (display-graphic-p frame)
    (error "Cannot adjust opacity of this frame"))
  (let* ((oldalpha (or (frame-parameter frame 'alpha) 100))
         ;; The 'alpha frame param became a pair at some point in
         ;; emacs 24.x, e.g. (100 100)
         (oldalpha (if (listp oldalpha) (car oldalpha) oldalpha))
         (newalpha (+ incr oldalpha)))
    (when (and (<= frame-alpha-lower-limit newalpha) (>= 100 newalpha))
      (modify-frame-parameters frame (list (cons 'alpha newalpha))))))

(earnemacs-spc-def
  ;; Frame opacity keybindings
  "t0" '(:def (lambda () (interactive) (modify-frame-parameters nil
                                         `((alpha . 100))))
          :wk "Reset transparency")
  "t-" '(:def (lambda () (interactive) (earnemacs-adjust-opacity nil -10))
          :wk "Decrease transparency")
  "t=" '(:def (lambda () (interactive) (earnemacs-adjust-opacity nil 10))
          :wk "Increase transparency"))


;; Increase/ decrease font size
(defun font-name-replace-size (font-name new-size)
  (let ((parts (split-string font-name "-")))
    (setcar (nthcdr 7 parts) (format "%d" new-size))
    (mapconcat 'identity parts "-")))

(defun increment-default-font-height (delta)
  "Adjust the default font height by DELTA on every frame.
The pixel size of the frame is kept (approximately) the same.
DELTA should be a multiple of 10, in the units used by the
:height face attribute. From purcell/emacs.d"
  (let* ((new-height (+ (face-attribute 'default :height) delta))
         (new-point-height (/ new-height 10)))
    (dolist (f (frame-list))
      (with-selected-frame f
        ;; Latest 'set-frame-font supports a "frames" arg, but
        ;; we cater to Emacs 23 by looping instead.
        (set-frame-font (font-name-replace-size (face-font 'default)
                                                new-point-height)
                        t)))
    (set-face-attribute 'default nil :height new-height)
    (message "default font size is now %d" new-point-height)))

;; Functions, keybindings for size
(defun increase-default-font-height ()
  (interactive)
  (increment-default-font-height 10))

(defun decrease-default-font-height ()
  (interactive)
  (increment-default-font-height -10))

(earnemacs-spc-def
  ;; -/+ zooms in/out using `text-scale-...'
  "z0" 'text-scale-adjust
  "z-" 'text-scale-decrease
  "z=" 'text-scale-increase
  ;; Shift -/+ increases the default font height
  "z+" 'increase-default-font-height
  "z_" 'decrease-default-font-height)

;; -
;; Setup font/ transparency/ display of frame
(defun earnemacs--frame-hook ()
  "Font and transparency settings. This is in a hook because Emacs doesn't
really like setting fonts/ transparency when run through a daemon."
  (if (not (null earnemacs-transparent-frame))
    (modify-all-frames-parameters `((alpha . 95))))

  (set-face-attribute 'default nil
    :font "Fira Code"
    :height earnemacs-default-face-height)

  (set-face-attribute 'fixed-pitch nil
    :font "Fira Code"
    :height earnemacs-fixed-face-height)

  (set-face-attribute 'variable-pitch nil
    :font "FiraGO"
    :height earnemacs-variable-face-height))

;; Run earnemacs--frame-hook, if daemon nothing will happen, but the hook will
;; set everything when it needs to.
(earnemacs--frame-hook)
(add-hook 'server-after-make-frame-hook 'earnemacs--frame-hook)

;; Give focus when a new client frame is created
(add-hook 'server-after-make-frame-hook
  (lambda () (select-frame-set-input-focus (selected-frame))))

(provide 'earnecore-display)
;;; earnecore-display.el ends here