fortrangoingonforty/facsimile / 47b313d

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feat: add LSP hover tooltip with Ctrl+H trigger

Co-Authored-By: mfwolffe <wolffemf@dukes.jmu.edu>
Authored by espadonne
SHA
47b313de316a3faedceefc325de5e0ac77627c98
Parents
caaf9cb
Tree
f47a7cd

5 changed files

StatusFile+-
M Makefile 1 0
M src/commands/command_handler_module.f90 25 0
M src/editor_state_module.f90 9 0
M src/terminal/input_handler_module.f90 2 2
A src/ui/hover_tooltip_module.f90 168 0
Makefilemodified
@@ -80,6 +80,7 @@ SOURCES = src/version_module.f90 \
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           src/lsp/lsp_server_manager_module.f90 \
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           src/lsp/lsp_client_module.f90 \
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           src/ui/completion_popup_module.f90 \
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+          src/ui/hover_tooltip_module.f90 \
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           src/editor_state_module.f90 \
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           src/undo/undo_stack_module.f90 \
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           src/workspace/file_tree_module.f90 \
src/commands/command_handler_module.f90modified
@@ -28,6 +28,8 @@ module command_handler_module
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                                         handle_completion_response, navigate_completion_up, &
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                                         navigate_completion_down, get_selected_completion, &
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                                         is_completion_visible
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+    use hover_tooltip_module, only: show_hover_tooltip, hide_hover_tooltip, &
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+                                     handle_hover_response, is_hover_visible
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     implicit none
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     private
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@@ -130,6 +132,12 @@ contains
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                 return
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             end if
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+            ! If hover tooltip is visible, hide it
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+            if (is_hover_visible(editor%hover_tooltip)) then
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+                call hide_hover_tooltip(editor%hover_tooltip)
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+                return
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+            end if
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+
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             ! ESC - Clear selections and return to single cursor mode
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             if (size(editor%cursors) > 1) then
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                 ! Keep only the active cursor
@@ -268,6 +276,11 @@ contains
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             call update_viewport(editor)
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         case('left')
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+            ! Hide hover tooltip on movement
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+            if (is_hover_visible(editor%hover_tooltip)) then
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+                call hide_hover_tooltip(editor%hover_tooltip)
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+            end if
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+
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             if (size(editor%cursors) > 1) then
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                 ! Move all cursors
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                 do i = 1, size(editor%cursors)
@@ -282,6 +295,11 @@ contains
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             call update_viewport(editor)
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         case('right')
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+            ! Hide hover tooltip on movement
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+            if (is_hover_visible(editor%hover_tooltip)) then
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+                call hide_hover_tooltip(editor%hover_tooltip)
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+            end if
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+
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             if (size(editor%cursors) > 1) then
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                 ! Move all cursors
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                 do i = 1, size(editor%cursors)
@@ -958,6 +976,13 @@ contains
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                             editor%tabs(editor%active_tab_index)%lsp_server_index, &
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                             editor%tabs(editor%active_tab_index)%filename, &
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                             lsp_line, lsp_char)
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+
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+                        if (request_id > 0) then
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+                            ! Show tooltip at cursor position (will populate when response arrives)
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+                            call show_hover_tooltip(editor%hover_tooltip, &
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+                                editor%cursors(editor%active_cursor)%line - editor%viewport_line + 2, &
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+                                editor%cursors(editor%active_cursor)%column - editor%viewport_column + 1)
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+                        end if
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                     end block
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                 end if
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             end if
src/editor_state_module.f90modified
@@ -8,6 +8,8 @@ module editor_state_module
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                                          request_completion, request_hover
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     use completion_popup_module, only: completion_popup_t, init_completion_popup, &
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                                        cleanup_completion_popup
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+    use hover_tooltip_module, only: hover_tooltip_t, init_hover_tooltip, &
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+                                    cleanup_hover_tooltip
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     implicit none
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     private
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@@ -101,6 +103,7 @@ module editor_state_module
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         ! LSP support
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         type(lsp_manager_t) :: lsp_manager
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         type(completion_popup_t) :: completion_popup
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+        type(hover_tooltip_t) :: hover_tooltip
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     end type editor_state_t
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 contains
@@ -132,6 +135,9 @@ contains
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         ! Initialize completion popup
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         call init_completion_popup(editor%completion_popup)
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+
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+        ! Initialize hover tooltip
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+        call init_hover_tooltip(editor%hover_tooltip)
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     end subroutine init_editor
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     subroutine cleanup_editor(editor)
@@ -155,6 +161,9 @@ contains
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         ! Cleanup completion popup
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         call cleanup_completion_popup(editor%completion_popup)
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+
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+        ! Cleanup hover tooltip
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+        call cleanup_hover_tooltip(editor%hover_tooltip)
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     end subroutine cleanup_editor
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     ! Helper to cleanup a single tab
src/terminal/input_handler_module.f90modified
@@ -63,8 +63,8 @@ contains
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             key_str = 'tab'
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         case(10, 13)  ! Enter
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             key_str = 'enter'
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-        case(8)  ! Ctrl-H (backspace)
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-            key_str = 'backspace'
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+        case(8)  ! Ctrl-H
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+            key_str = 'ctrl-h'
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         case(26)  ! Ctrl-Z
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             key_str = 'ctrl-z'
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         case(31)  ! Ctrl-/ and Ctrl-? (both send ASCII 31)
src/ui/hover_tooltip_module.f90added
@@ -0,0 +1,168 @@
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+module hover_tooltip_module
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+    use iso_fortran_env, only: int32
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+    use terminal_io_module, only: terminal_move_cursor, terminal_write
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+    use json_module, only: json_value_t, json_get_string, &
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+                           json_get_object, json_has_key
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+    implicit none
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+    private
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+
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+    public :: hover_tooltip_t
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+    public :: init_hover_tooltip, cleanup_hover_tooltip
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+    public :: show_hover_tooltip, hide_hover_tooltip
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+    public :: handle_hover_response
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+    public :: is_hover_visible
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+
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+    integer, parameter :: MAX_WIDTH = 60
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+    integer, parameter :: MAX_HEIGHT = 10
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+
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+    type :: hover_tooltip_t
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+        character(len=:), allocatable :: content
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+        logical :: visible = .false.
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+
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+        ! Position on screen
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+        integer :: row = 0
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+        integer :: col = 0
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+        integer :: width = 0
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+        integer :: height = 0
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+    end type hover_tooltip_t
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+
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+contains
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+
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+    subroutine init_hover_tooltip(tooltip)
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+        type(hover_tooltip_t), intent(out) :: tooltip
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+
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+        tooltip%visible = .false.
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+        tooltip%row = 0
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+        tooltip%col = 0
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+        tooltip%width = 0
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+        tooltip%height = 0
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+
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+        if (allocated(tooltip%content)) deallocate(tooltip%content)
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+    end subroutine init_hover_tooltip
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+
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+    subroutine cleanup_hover_tooltip(tooltip)
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+        type(hover_tooltip_t), intent(inout) :: tooltip
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+
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+        if (allocated(tooltip%content)) deallocate(tooltip%content)
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+        tooltip%visible = .false.
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+    end subroutine cleanup_hover_tooltip
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+
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+    ! Handle LSP hover response and populate tooltip
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+    subroutine handle_hover_response(tooltip, response)
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+        type(hover_tooltip_t), intent(inout) :: tooltip
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+        type(json_value_t), intent(in) :: response
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+        type(json_value_t) :: contents
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+        character(len=:), allocatable :: hover_text
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+
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+        call cleanup_hover_tooltip(tooltip)
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+
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+        ! Check if response has contents
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+        if (json_has_key(response, "contents")) then
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+            contents = json_get_object(response, "contents")
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+
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+            ! Try to get value from MarkupContent or MarkedString
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+            if (json_has_key(contents, "value")) then
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+                hover_text = json_get_string(contents, "value")
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+            else
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+                ! Might be a plain string
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+                hover_text = json_get_string(response, "contents")
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+            end if
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+
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+            if (len_trim(hover_text) > 0) then
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+                tooltip%content = hover_text
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+                call calculate_tooltip_dimensions(tooltip)
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+            end if
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+        end if
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+    end subroutine handle_hover_response
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+
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+    subroutine calculate_tooltip_dimensions(tooltip)
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+        type(hover_tooltip_t), intent(inout) :: tooltip
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+        integer :: content_len, lines, i, line_start, line_len, max_line_len
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+
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+        if (.not. allocated(tooltip%content)) return
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+
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+        content_len = len(tooltip%content)
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+        lines = 1
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+        max_line_len = 0
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+        line_start = 1
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+
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+        ! Count lines and find max line length
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+        do i = 1, content_len
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+            if (tooltip%content(i:i) == char(10)) then  ! newline
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+                line_len = i - line_start
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+                if (line_len > max_line_len) max_line_len = line_len
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+                lines = lines + 1
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+                line_start = i + 1
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+            end if
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+        end do
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+
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+        ! Check last line
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+        line_len = content_len - line_start + 1
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+        if (line_len > max_line_len) max_line_len = line_len
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+
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+        tooltip%width = min(max_line_len + 4, MAX_WIDTH)  ! +4 for borders and padding
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+        tooltip%height = min(lines + 2, MAX_HEIGHT)  ! +2 for borders
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+    end subroutine calculate_tooltip_dimensions
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+
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+    subroutine show_hover_tooltip(tooltip, row, col)
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+        type(hover_tooltip_t), intent(inout) :: tooltip
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+        integer, intent(in) :: row, col
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+        integer :: display_row, i, line_start, line_end
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+        character(len=256) :: line
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+
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+        if (.not. allocated(tooltip%content)) return
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+        if (len_trim(tooltip%content) == 0) return
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+
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+        tooltip%row = row
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+        tooltip%col = col
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+        tooltip%visible = .true.
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+
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+        ! Draw top border
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+        call terminal_move_cursor(tooltip%row, tooltip%col)
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+        call terminal_write("┌" // repeat("─", tooltip%width - 2) // "┐")
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+
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+        ! Draw content lines
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+        display_row = tooltip%row + 1
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+        line_start = 1
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+
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+        do i = 1, len(tooltip%content)
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+            if (tooltip%content(i:i) == char(10) .or. i == len(tooltip%content)) then
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+                if (i == len(tooltip%content) .and. tooltip%content(i:i) /= char(10)) then
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+                    line_end = i
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+                else
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+                    line_end = i - 1
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+                end if
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+
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+                call terminal_move_cursor(display_row, tooltip%col)
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+                write(line, '(a,a,a)') "│ ", &
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+                    tooltip%content(line_start:line_end), " "
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+                call terminal_write(line(1:min(len_trim(line), tooltip%width - 1)))
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+                call terminal_move_cursor(display_row, tooltip%col + tooltip%width - 1)
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+                call terminal_write("│")
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+
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+                display_row = display_row + 1
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+                line_start = i + 1
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+
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+                if (display_row - tooltip%row >= tooltip%height - 1) exit
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+            end if
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+        end do
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+
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+        ! Draw bottom border
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+        call terminal_move_cursor(display_row, tooltip%col)
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+        call terminal_write("└" // repeat("─", tooltip%width - 2) // "┘")
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+
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+    end subroutine show_hover_tooltip
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+
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+    subroutine hide_hover_tooltip(tooltip)
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+        type(hover_tooltip_t), intent(inout) :: tooltip
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+        tooltip%visible = .false.
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+    end subroutine hide_hover_tooltip
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+
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+    function is_hover_visible(tooltip) result(visible)
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+        type(hover_tooltip_t), intent(in) :: tooltip
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+        logical :: visible
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+
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+        visible = tooltip%visible
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+    end function is_hover_visible
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+
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+end module hover_tooltip_module